阅读说明：本技术 一种盐酸异丙肾上腺素的制备方法 (Preparation method of isoproterenol hydrochloride ) 是由 常章锋 邢兴龙 樊根遥 张倩如 赵晓雷 赵亚翡 田志国 李军 龚清 李萍 于 2021-01-19 设计创作，主要内容包括：本发明涉及原料药合成技术领域,具体涉及一种盐酸异丙肾上腺素的制备方法。该制备方法以水、N,N-二甲基甲酰胺,或N,N-二甲基甲酰胺的水溶液为溶剂,以硼氢化物为还原剂对异丙基肾上腺酮或其盐进行还原反应,反应条件温和,与常规加氢还原工艺相比显著提高了生产的安全性,大大降低了生产成本,并且硼氢化物使用量较少,一定程度上增加了对环境的保护。该制备方法所得产物纯度很高,适用于盐酸异丙肾上腺素作为医药原料药产品的工业化生产,可有效避免杂质引起的毒副作用。(The invention relates to the technical field of raw material medicine synthesis, in particular to a preparation method of isoproterenol hydrochloride. The preparation method takes water, N-dimethylformamide or an aqueous solution of the N, N-dimethylformamide as a solvent, takes borohydride as a reducing agent to carry out reduction reaction on the isopropyl adrenalone or the salt thereof, has mild reaction conditions, obviously improves the production safety compared with the conventional hydrogenation reduction process, greatly reduces the production cost, has less borohydride consumption and increases the environmental protection to a certain extent. The product obtained by the preparation method has high purity, is suitable for industrial production of isoproterenol hydrochloride serving as a medicinal raw material product, and can effectively avoid toxic and side effects caused by impurities.)

1. A preparation method of isoproterenol hydrochloride is characterized by comprising the steps of carrying out reduction reaction on isoproterenone or salt thereof and borohydride in a solvent, and then reacting with hydrochloric acid to form salt so as to obtain a crude product of isoproterenol hydrochloride; the solvent is water, N-dimethylformamide, or an aqueous solution of N, N-dimethylformamide.

2. The method for preparing isoproterenol hydrochloride according to claim 1, wherein the borohydride comprises at least one of sodium borohydride, potassium borohydride, lithium borohydride, and zinc borohydride; and/or

The molar ratio of the isopropyl adrenalone or the salt thereof to the borohydride hydrogen borate radical is 1: 0.25-1.9; and/or

The reaction temperature is 2-18 ℃.

3. The method for preparing isoproterenol hydrochloride according to claim 1, wherein the volume ratio of water to N, N-dimethylformamide in the aqueous solution of N, N-dimethylformamide is 1: 0.1 to 10.

4. The method for preparing isoproterenol hydrochloride according to claim 1, wherein the solvent is water.

5. The method for preparing isoproterenol hydrochloride according to claim 1, wherein the amount of the solvent used per gram of the isoproterenol or the salt thereof is 5 to 20 ml.

6. The method for preparing isoproterenol hydrochloride according to any one of claims 1 to 5, wherein the method further comprises purifying the crude isoproterenol hydrochloride by: refluxing the isoproterenol hydrochloride crude product in a purification solvent, carrying out hot filtration, cooling and crystallizing filtrate, carrying out solid-liquid separation to obtain a solid, placing the obtained solid in a mixed solution, stirring, filtering and drying; the purification solvent is methanol or ethanol; the mixed solution is a mixture of an organic solvent and water, and the organic solvent is any one of isopropanol, n-propanol, tert-butanol, acetonitrile or acetone.

7. The method for preparing isoproterenol hydrochloride according to claim 6, wherein the refluxing time is 10 to 60 min; and/or

Cooling the filtrate to 10-20 ℃; and/or

And controlling the temperature of the solid in the mixed solution to be 20-40 ℃ and stirring.

8. The method for preparing isoproterenol hydrochloride according to claim 6, wherein the volume of the purification solvent per gram of the isoproterenol hydrochloride crude product is 5 to 20ml, and the volume of the mixed solution is 5 to 20 ml.

9. The method for preparing isoproterenol hydrochloride according to claim 7, wherein the volume ratio of the organic solvent to the water in the mixed solution is 4 to 15: 1.

10. A method for producing high-purity isoproterenol hydrochloride is characterized by comprising the following steps:

s1, synthesizing isopropyl adrenalone or salt thereof;

s2, carrying out reduction reaction on the isopropyl adrenalone or the salt thereof and borohydride in a solvent at the temperature of 2-18 ℃, and reacting with hydrochloric acid to form salt to obtain a crude product of isoproterenol hydrochloride; the solvent is N, N-dimethylformamide, water or an aqueous solution of N, N-dimethylformamide; the volume ratio of water to the N, N-dimethylformamide in the N, N-dimethylformamide aqueous solution is 1: 0.1-10; the molar ratio of the isopropyl adrenalone or the salt thereof to the borohydride salt is 1: 0.25-1.9;

s3, sequentially purifying the isoproterenol hydrochloride crude product by using a purification solvent and a mixed solution; the purification solvent is methanol or ethanol, the mixed solution is a mixture of an organic solvent and water, and the organic solvent is any one of isopropanol, n-propanol, tert-butanol, acetonitrile or acetone.

Technical Field

The invention belongs to the technical field of raw material medicine synthesis, and particularly relates to a preparation method of isoproterenol hydrochloride.

Background

Isoproterenol hydrochloride [3, 4-dihydroxy-alpha- (isopropylaminomethyl) -benzyl alcohol hydrochloride ] is a vasoactive drug, belongs to a beta receptor agonist, is used for bronchial asthma, cardiogenic or infectious shock, complete atrioventricular block and sudden cardiac arrest, and is widely applied clinically at present.

However, the synthesis of isoproterenol hydrochloride is difficult, and the currently known processes mainly include: (1) tyrosine is taken as a raw material and synthesized by a bio-enzyme catalysis method, but the method has not realized large-scale industrial production; (2) pyrocatechol is used as an initial raw material, 3, 4-dihydroxy-alpha-chloroacetophenone is generated through chloroacetylation, then sodium borohydride is used for reduction, and finally the product is synthesized through amine, wherein the product yield and the product purity are low; (3) the isopropyl adrenalone is hydrogenated under the catalytic action of palladium carbon, and a product is obtained through post-treatment, but the palladium carbon catalyst is extremely easy to spontaneously combust and inactivate, certain hydrogen pressure needs to be kept in the reaction process, and the hydrogen is extremely easy to explode, so that the potential safety hazard is very large; (4) isopropyl adrenalone is reduced under the action of sodium borohydride in methanol, the reaction is heterogeneous, the required sodium borohydride is large in amount (4 to 10 times of the molar amount of isopropyl adrenalone), ethyl acetate is used for extraction after concentration, inorganic salts in a reaction system are difficult to remove in the post-treatment process, the detection item of the burning residues of the products does not meet the medical quality requirement, the content of the products entering the ethyl acetate in the extraction process is very small, the product yield is extremely low, and industrial production cannot be realized. Meanwhile, excessive sodium borohydride three-waste treatment products have great harm to the environment.

Disclosure of Invention

Aiming at the technical problems, the invention provides the preparation method of isoproterenol hydrochloride, which has the advantages of simple operation, mild conditions, easy industrialization, qualified product quality and high purity of over 99.9 percent.

In order to achieve the purpose of the invention, the embodiment of the invention adopts the following technical scheme:

in a first aspect, an embodiment of the present invention provides a preparation method of isoproterenol hydrochloride, where the preparation method includes performing a reduction reaction on isoproterenone or a salt thereof and borohydride in a solvent, and then reacting with hydrochloric acid to form a salt, so as to obtain a crude product of isoproterenol hydrochloride; the solvent is water, N-Dimethylformamide (DMF), or an aqueous solution of N, N-dimethylformamide.

The preparation method avoids using a catalytic hydrogenation process, avoids using a noble metal catalyst and explosive gas hydrogen, reduces the production cost and increases the production safety. According to the invention, a large number of researches show that when N, N-dimethylformamide, water or an aqueous solution of the N, N-dimethylformamide is used as a reaction solvent, isopropyl adrenalone or a salt thereof and borohydride can form a homogeneous system with the solvent, so that the borohydride can efficiently complete the reduction reaction of the isopropyl adrenalone or the salt thereof at a dosage far lower than that in the prior art, the content of inorganic salts in the obtained product is greatly reduced, the difficulty of post-treatment is reduced, the industrialization degree of producing the isoproterenol hydrochloride is improved, the cost is effectively saved, and the environmental protection pressure is reduced. And the purity of the obtained product is obviously improved, the quality of the isoproterenol hydrochloride serving as a raw material medicine product is favorably improved, and the toxic and side effects of the isoproterenol hydrochloride are reduced. The reaction formula is shown as follows:

the isopropyl adrenal ketone salt can be selected from inorganic acid salts such as hydrochloride, sulfate, phosphate, and hydrobromide, or organic acid salts such as acetate, formate, propionate, and oxalate.

Preferably, the borohydride comprises at least one of sodium borohydride, potassium borohydride, lithium borohydride and zinc borohydride.

Preferably, the molar ratio of the isopropyl adrenalone or the salt thereof to the borohydride hydrogen borate is 1: 0.25-1.9. The reduction of the isopropyl adrenalone or the salt thereof can be completed under the molar ratio, and the obtained product has little inorganic salt content and high purity. The molar ratio of the isopropyl adrenalone or the salt thereof to the sodium borohydride is further preferably 1: 0.3-1.5, so that the isopropyl adrenalone or the salt thereof is completely reduced, and the content of inorganic salts in a product is further controlled.

Preferably, the reaction temperature is 2-18 ℃, and researches show that when N, N-dimethylformamide, water or an aqueous solution of N, N-dimethylformamide is used as a reaction solvent, the impurity content in the product can be further reduced by carrying out the reaction in the temperature range, and the yield is high.

Preferably, the volume ratio of water to N, N-dimethylformamide in the aqueous solution of N, N-dimethylformamide is 1: 0.1-10.

Preferably, the solvent is water. The water is used as a solvent, so that the production cost is lower, the environment is not polluted, and the production is safer.

Preferably, the dosage of the solvent corresponding to each gram of the isopropyl adrenalone or the salt thereof is 5-20 ml.

Preferably, the preparation method further comprises purifying the isoproterenol hydrochloride crude product, and the specific operations are as follows: refluxing the isoproterenol hydrochloride crude product in a purification solvent, carrying out hot filtration, cooling and crystallizing the filtrate, carrying out solid-liquid separation to obtain a solid, placing the obtained solid in a mixed solution, stirring, filtering and drying; the purification solvent is methanol or ethanol; the mixed solution is a mixture of an organic solvent and water, and the organic solvent is any one of isopropanol, n-propanol, tert-butanol, acetonitrile or acetone.

Optionally, the refluxing time is 10-60 min;

cooling the filtrate to 10-20 ℃;

and controlling the temperature of the solid in the mixed solution to be 20-40 ℃ and stirring.

Preferably, the volume of the purification solvent per gram of the isoproterenol hydrochloride crude product is 5-20 ml, and the volume of the mixed solution is 5-20 ml.

Preferably, in the mixed solution, the volume ratio of the organic solvent to the water is 4-15: 1. The mixed solution with the proportion can purify the isoproterenol hydrochloride crude product obtained by the preparation method, and can effectively improve the purity of the finished product.

In a second aspect, an embodiment of the present invention provides a method for producing high-purity isoproterenol hydrochloride, which specifically includes the following steps:

s1, synthesizing isopropyl adrenalone or salt thereof;

s2, carrying out reduction reaction on the isopropyl adrenalone or the salt thereof and borohydride in a solvent at the temperature of 2-18 ℃, and reacting with hydrochloric acid to form salt to obtain a crude product of isoproterenol hydrochloride; the solvent is N, N-dimethylformamide, water or an aqueous solution of N, N-dimethylformamide; the volume ratio of water to the N, N-dimethylformamide in the N, N-dimethylformamide aqueous solution is 1: 0.1-10; the molar ratio of the isopropyl adrenalone or the salt thereof to the borohydride salt is 1: 0.25-1.9;

s3, purifying the isoproterenol hydrochloride crude product by using a purification solvent and a mixed solution; the purification solvent is methanol or ethanol, the mixed solution is a mixture of an organic solvent and water, and the organic solvent is any one of isopropanol, n-propanol, tert-butanol, acetonitrile or acetone.

The reaction conditions in the steps are mild, the prepared isoproterenol hydrochloride crude product has extremely low content of inorganic salts and high purity, and the purity of the purified product is further improved, so that the requirement of the product as a raw material medicine on quality is completely met.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the following examples, isopropyl-adrenalone hydrochloride (i.e., isopropyl-adrenalone hydrochloride) is used for the isopropyl-adrenalone, but other salts of isopropyl-adrenalone or isopropyl-adrenalone are also within the scope of the present invention.

Example 1

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesis of isopropyl adrenalone hydrochloride:

adding 200ml of dichloromethane into a 500ml four-mouth bottle, cooling to 25 ℃, sequentially adding 51g of aluminum trichloride, 22.5g of chloroacetyl chloride and 20g of catechol, heating to reflux after the addition is finished, carrying out reflux and heat preservation reaction, and monitoring by TLC after 5 hours until the reaction is finished. After the reaction is finished, 200ml of dilute hydrochloric acid is added, stirring is carried out, crystallization is carried out, suction filtration is carried out, and a filter cake is dried to obtain 30.6g of a compound A [ p- (chloroacetyl) catechol ], the yield is 90.3%, and the HPLC purity is 99.69%.

Adding 200ml of toluene and 100ml of isopropylamine into a 500ml four-mouth bottle, cooling to 5 ℃, adding 25g of the compound A, heating to 20-25 ℃, reacting for 5 hours, and monitoring by TLC (thin layer chromatography) until the reaction is finished. After the reaction is finished, concentrating to remove toluene and isopropylamine, adding 100ml of acetone, adding hydrochloric acid to adjust the pH value to 1-2, performing suction filtration, and drying a filter cake to obtain 28.1g of a compound B (isopropyl adrenalone hydrochloride), wherein the HPLC purity is 99.56% and the yield is 85.3%.

S2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 200ml of DMF, stirring to dissolve, cooling to 3 ℃, adding 3.85g of sodium borohydride (0.102mol), reacting for 2h at 5-12 ℃, and monitoring by TLC to show that the reaction is finished. And after the reaction is finished, decompressing and concentrating to remove 190ml of DMF, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 2-3 with hydrochloric acid, filtering, and drying the filter cake to obtain 24.22g of the isoproterenol hydrochloride crude product. The purity of the isoproterenol hydrochloride crude product is 99.08 percent, and the residue on ignition is 0.06 percent.

Example 2

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 200ml of water, stirring to dissolve, cooling to 2 ℃, adding 3.85g (0.102mol) of sodium borohydride, reacting for 3 hours at 2-8 ℃, and monitoring by TLC to show that the reaction is finished. And after the reaction is finished, concentrating under reduced pressure to remove 180ml of water, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 3-4 with hydrochloric acid, filtering, and drying a filter cake to obtain 24.25g of a crude isoproterenol hydrochloride product. The purity of the isoproterenol hydrochloride crude product is 99.87 percent, and the burning residue is 0.05 percent.

Example 3

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 180ml of DMF and 18ml of water, stirring to dissolve, cooling to 3 ℃, adding 3.85g (0.102mol) of sodium borohydride, reacting for 1h at 12-18 ℃, and monitoring by TLC to show that the reaction is finished. After the reaction is finished, 188ml of DMF and water are removed through decompression and concentration, 200ml of isopropanol is added into the concentrate, the pH value is adjusted to 2-3 through hydrochloric acid, filtering is carried out, and a filter cake is dried to obtain 24.31g of the isoproterenol hydrochloride crude product. The purity of the isoproterenol hydrochloride crude product is 99.00 percent, and the burning residue is 0.06 percent.

Example 4

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 18ml of DMF and 180ml of water, stirring to dissolve, cooling to 4 ℃, adding 3.85g (0.102mol) of sodium borohydride, reacting for 2 hours at 6-12 ℃, and monitoring by TLC to show that the reaction is finished. And after the reaction is finished, concentrating under reduced pressure to remove 180ml of DMF and water, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 2-3 with hydrochloric acid, filtering, and drying the filter cake to obtain 24.42g of isoproterenol hydrochloride crude product. The purity of the isoproterenol hydrochloride crude product is 99.87 percent, and the burning residue is 0.05 percent.

Example 5

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 100ml of DMF and 100ml of water, stirring to dissolve, cooling to 4 ℃, adding 3.85g (0.102mol) of sodium borohydride, reacting for 2 hours at 2-18 ℃, and monitoring by TLC to show that the reaction is finished. And after the reaction is finished, carrying out reduced pressure concentration to remove 185ml of DMF and water, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 2-3 with hydrochloric acid, filtering, and drying the filter cake to obtain 24.36g of the isoproterenol hydrochloride crude product. The purity of the isoproterenol hydrochloride crude product is 99.77 percent, and the burning residue is 0.06 percent.

Example 6

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 200ml of water, stirring to dissolve, cooling to 2 ℃, adding 5.49g (0.102mol) of potassium borohydride, reacting for 2 hours at 2-18 ℃, and monitoring by TLC to show that the reaction is finished. And after the reaction is finished, concentrating under reduced pressure to remove 180ml of water, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 3-4 with hydrochloric acid, filtering, and drying a filter cake to obtain 24.20g of a crude isoproterenol hydrochloride product. The purity of the isoproterenol hydrochloride crude product is 99.68 percent, and the burning residue is 0.07 percent.

Example 7

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 200ml of water, stirring to dissolve, cooling to 5 ℃, adding 2.42g (0.102mol) of lithium borohydride, reacting for 2 hours at 2-18 ℃, and monitoring by TLC to show that the reaction is finished. And after the reaction is finished, concentrating under reduced pressure to remove 180ml of water, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 2-3 with hydrochloric acid, filtering, and drying a filter cake to obtain 24.18g of a crude isoproterenol hydrochloride product. The purity of the isoproterenol hydrochloride crude product is 99.74 percent, and the burning residue is 0.06 percent.

Example 8

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 200ml of water, stirring to dissolve, cooling to 3 ℃, adding 2.84g (0.051mol) of zinc borohydride, reacting for 2 hours at 2-18 ℃, and monitoring by TLC to show that the reaction is finished. And after the reaction is finished, concentrating under reduced pressure to remove 180ml of water, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 2-3 with hydrochloric acid, filtering, and drying a filter cake to obtain 24.15g of a crude isoproterenol hydrochloride product. The purity of the isoproterenol hydrochloride crude product is 99.45 percent, and the burning residue is 0.05 percent.

Example 9

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 200ml of water, stirring to dissolve, cooling to 2 ℃, adding 0.96g (0.025mol) of sodium borohydride, reacting for 2 hours at 2-18 ℃, and monitoring by TLC to show that the reaction is finished. And after the reaction is finished, concentrating under reduced pressure to remove 180ml of water, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 3-4 with hydrochloric acid, filtering, and drying a filter cake to obtain 24.17g of a crude isoproterenol hydrochloride product. The purity of the isoproterenol hydrochloride crude product is 98.84 percent, and the burning residue is 0.06 percent.

Example 10

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 200ml of water, stirring to dissolve, cooling to 2 ℃, adding 7.31g (0.193mol) of sodium borohydride, reacting for 2 hours at 2-18 ℃, and monitoring by TLC to show that the reaction is finished. And after the reaction is finished, concentrating under reduced pressure to remove 180ml of water, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 2-3 with hydrochloric acid, filtering, and drying a filter cake to obtain 24.51g of isoproterenol hydrochloride crude product. The purity of the isoproterenol hydrochloride crude product is 98.87 percent, and the burning residue is 0.05 percent.

Example 11

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 200ml of water, stirring to dissolve, cooling to 2 ℃, adding 1.15g (0.030mol) of sodium borohydride, reacting for 2 hours at 2-18 ℃, and monitoring by TLC to show that the reaction is finished. And after the reaction is finished, concentrating under reduced pressure to remove 180ml of water, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 3-4 with hydrochloric acid, filtering, and drying a filter cake to obtain 24.29g of a crude isoproterenol hydrochloride product. The purity of the isoproterenol hydrochloride crude product is 99.60 percent, and the burning residue is 0.06 percent.

Example 12

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 200ml of water, stirring to dissolve, cooling to 2 ℃, adding 5.77g (0.153mol) of sodium borohydride, reacting for 2 hours at 2-18 ℃, and monitoring by TLC to show that the reaction is finished. And after the reaction is finished, concentrating under reduced pressure to remove 180ml of water, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 3-4 with hydrochloric acid, filtering, and drying a filter cake to obtain 24.48g of a crude isoproterenol hydrochloride product. The purity of the isoproterenol hydrochloride crude product is 99.91 percent, and the burning residue is 0.05 percent.

Example 13

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 250ml four-mouth bottle, adding 125ml of water, stirring to dissolve, cooling to 2 ℃, adding 3.85g (0.102mol) of sodium borohydride, reacting for 3 hours at 2-8 ℃, and monitoring by TLC to show that the reaction is finished. And after the reaction is finished, concentrating under reduced pressure to remove 110ml of water, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 3-4 with hydrochloric acid, filtering, and drying a filter cake to obtain 24.22g of a crude isoproterenol hydrochloride product. The purity of the isoproterenol hydrochloride crude product is 99.84 percent, and the burning residue is 0.06 percent.

Example 14

The embodiment provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 1L four-mouth bottle, adding 500ml of water, stirring to dissolve, cooling to 2 ℃, adding 3.85g (0.102mol) of sodium borohydride, reacting for 3 hours at 2-8 ℃, and monitoring by TLC to show that the reaction is finished. And after the reaction is finished, concentrating under reduced pressure to remove 450ml of water, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 3-4 with hydrochloric acid, filtering, and drying a filter cake to obtain 24.25g of a crude isoproterenol hydrochloride product. The purity of the isoproterenol hydrochloride crude product is 99.85 percent, and the burning residue is 0.06 percent.

Example 15

The embodiment provides a method for producing high-purity isoproterenol hydrochloride, which specifically comprises the following steps:

taking 10.00g of the isoproterenol hydrochloride crude product (with the purity of 99.08%) prepared in example 1, adding the crude product into a 250ml four-mouth bottle, adding 80ml of ethanol, heating to reflux, refluxing for 10min, carrying out heat filtration, cooling the filtrate to 18 ℃, carrying out suction filtration after crystallization, drying the filter cake to obtain 9.25g of solid, then adding the 9.25g of solid into the 250ml four-mouth bottle, adding 70ml of isopropanol and 10ml of water, controlling the temperature to be 30-40 ℃, stirring for 2h, carrying out suction filtration, and drying the filter cake to obtain 8.05g of isoproterenol hydrochloride finished product. The purity of the finished product of isoproterenol hydrochloride is 99.97 percent, and the residue on ignition is 0.02 percent.

Example 16

The embodiment provides a method for producing high-purity isoproterenol hydrochloride, which specifically comprises the following steps:

taking 10.00g of the isoproterenol hydrochloride crude product (with the purity of 99.08%) prepared in example 1, adding the crude product into a 250ml four-mouth bottle, adding 80ml of methanol, heating to reflux, refluxing for 30min, carrying out heat filtration, cooling the filtrate to 17 ℃, carrying out suction filtration after crystallization, drying the filter cake to obtain 8.15g of solid, then adding 8.15g of the solid into the 250ml four-mouth bottle, adding 70ml of isopropanol and 10ml of water, controlling the temperature to be 30-40 ℃, stirring for 3h, carrying out suction filtration, and drying the filter cake to obtain 7.05g of isoproterenol hydrochloride finished product. The purity of the finished product of isoproterenol hydrochloride is 99.91 percent, and the residue on ignition is 0.02 percent.

Example 17

The embodiment provides a method for producing high-purity isoproterenol hydrochloride, which specifically comprises the following steps:

taking 10.00g of the isoproterenol hydrochloride crude product (with the purity of 98.84%) prepared in example 9, adding the crude product into a 250ml four-mouth bottle, adding 120ml of ethanol, heating to reflux, refluxing for 60min, carrying out heat filtration, cooling the filtrate to 18 ℃, carrying out suction filtration after crystallization, drying the filter cake to obtain 9.15g of solid, then adding the 9.15g of solid into the 250ml four-mouth bottle, adding 150ml of isopropanol and 10ml of water, controlling the temperature to be 25-35 ℃, stirring for 3h, carrying out suction filtration, and drying the filter cake to obtain 8.10g of isoproterenol hydrochloride finished product. The purity of the finished product of isoproterenol hydrochloride is 99.95 percent, and the residue on ignition is 0.01 percent.

Example 18

Taking 10.00g of the isoproterenol hydrochloride crude product (with the purity of 98.84%) prepared in example 9, adding the crude product into a 250ml four-mouth bottle, adding 120ml of ethanol, heating to reflux, refluxing for 20min, carrying out heat filtration, cooling the filtrate to 16 ℃, carrying out suction filtration after crystallization, drying the filter cake to obtain 9.18g of solid, then adding the 9.18g of solid into the 250ml four-mouth bottle, adding 70ml of isopropanol and 10ml of water, controlling the temperature to be 25-35 ℃, stirring for 4h, carrying out suction filtration, and drying the filter cake to obtain 7.95g of isoproterenol hydrochloride finished product. The purity of the finished product of isoproterenol hydrochloride is 99.96 percent, and the residue on ignition is 0.02 percent.

Example 19

Taking 10.00g of the isoproterenol hydrochloride crude product (with the purity of 98.87%) prepared in the example 10, adding the crude product into a 250ml four-mouth bottle, adding 80ml of ethanol, heating to reflux, refluxing for 20min, carrying out heat filtration, cooling the filtrate to 17 ℃, carrying out suction filtration after crystallization, drying the filter cake to obtain 9.26g of solid, then adding the 9.26g of solid into the 250ml four-mouth bottle, adding 70ml of acetonitrile and 10ml of water, controlling the temperature to be 25-35 ℃, stirring for 3h, carrying out suction filtration, and drying the filter cake to obtain 8.02g of isoproterenol hydrochloride finished product. The purity of the finished product of isoproterenol hydrochloride is 99.91 percent, and the residue on ignition is 0.02 percent.

Example 20

Taking 10.00g of the isoproterenol hydrochloride crude product (with the purity of 98.87%) prepared in the example 10, adding the crude product into a 250ml four-mouth bottle, adding 80ml of ethanol, heating to reflux, refluxing for 20min, carrying out heat filtration, cooling the filtrate to 15 ℃, carrying out suction filtration after crystallization, drying the filter cake to obtain 9.24g of solid, then adding the 9.24g of solid into the 250ml four-mouth bottle, adding 70ml of acetone and 10ml of water, controlling the temperature to be 25-35 ℃, stirring for 3h, carrying out suction filtration, and drying the filter cake to obtain 8.03g of isoproterenol hydrochloride finished product. The purity of the finished product of isoproterenol hydrochloride is 99.95 percent, and the residue on ignition is 0.02 percent.

Example 21

Taking 10.00g of the isoproterenol hydrochloride crude product (with the purity of 99.00%) prepared in the example 3, adding the crude product into a 250ml four-mouth bottle, adding 80ml of ethanol, heating to reflux, refluxing for 20min, carrying out heat filtration, cooling the filtrate to 20 ℃, carrying out suction filtration after crystallization, drying the filter cake to obtain 9.15g of solid, then adding the 9.15g of solid into the 250ml four-mouth bottle, adding 70ml of tert-butyl alcohol and 10ml of water, controlling the temperature to be 25-35 ℃, stirring for 3h, carrying out suction filtration, and drying the filter cake to obtain 7.92g of isoproterenol hydrochloride finished product. The purity of the finished product of isoproterenol hydrochloride is 99.97 percent, and the residue on ignition is 0.02 percent.

Example 22

Taking 10.00g of the isoproterenol hydrochloride crude product (with the purity of 99.00%) prepared in the example 3, adding the crude product into a 250ml four-mouth bottle, adding 80ml of ethanol, heating to reflux, refluxing for 20min, carrying out heat filtration, cooling the filtrate to 19 ℃, carrying out suction filtration after crystallization, drying the filter cake to obtain 9.19g of solid, then adding 9.19g of the solid into the 250ml four-mouth bottle, adding 70ml of n-propanol and 10ml of water, controlling the temperature to be 25-35 ℃, stirring for 3h, carrying out suction filtration, and drying the filter cake to obtain 8.01g of isoproterenol hydrochloride finished product. The purity of the finished product of isoproterenol hydrochloride is 99.93 percent, and the residue on ignition is 0.01 percent.

Example 23

Taking 10.00g of the isoproterenol hydrochloride crude product (with the purity of 99.84%) prepared in example 13, adding the crude product into a 100ml four-mouth bottle, adding 50ml of ethanol, heating to reflux, refluxing for 20min, carrying out heat filtration, cooling the filtrate to 20 ℃, carrying out suction filtration after crystallization, drying the filter cake to obtain 9.42g of solid, then adding the 9.42g of solid into the 100ml four-mouth bottle, adding 40ml of isopropanol and 10ml of water, controlling the temperature to be 30-40 ℃, stirring for 3h, carrying out suction filtration, and drying the filter cake to obtain 8.01g of isoproterenol hydrochloride finished product. The purity of the finished product of isoproterenol hydrochloride is 99.93 percent, and the residue on ignition is 0.02 percent.

Example 24

Taking 10.00g of the isoproterenol hydrochloride crude product (with the purity of 99.84%) prepared in example 13, adding the crude product into a 100ml four-mouth bottle, adding 200ml of ethanol, heating to reflux, refluxing for 20min, carrying out heat filtration, cooling the filtrate to 10 ℃, carrying out suction filtration after crystallization, drying the filter cake to obtain 9.10g of solid, then adding the 9.10g of solid into a 250ml four-mouth bottle, adding 160ml of isopropanol and 40ml of water, controlling the temperature to be 20-30 ℃, stirring for 3h, carrying out suction filtration, and drying the filter cake to obtain 7.29g of isoproterenol hydrochloride finished product. The purity of the finished product of isoproterenol hydrochloride is 99.92 percent, and the residue on ignition is 0.01 percent.

Example 25

Taking 10.00g of the isoproterenol hydrochloride crude product (with the purity of 99.85%) prepared in example 14, adding the crude product into a 250ml four-mouth bottle, adding 80ml of ethanol, heating to reflux, refluxing for 20min, carrying out heat filtration, cooling the filtrate to 18 ℃, carrying out suction filtration after crystallization, drying the filter cake to obtain 9.20g of solid, then adding 9.20g of the solid into a 100ml four-mouth bottle, adding 46.9ml of isopropanol and 3.1ml of water, controlling the temperature to be 30-40 ℃, stirring for 3h, carrying out suction filtration, and drying the filter cake to obtain 8.45g of isoproterenol hydrochloride finished product. The purity of the finished product of isoproterenol hydrochloride is 99.92 percent, and the residue on ignition is 0.01 percent.

Example 26

Taking 10.00g of the isoproterenol hydrochloride crude product (with the purity of 99.85%) prepared in example 14, adding the crude product into a 250ml four-mouth bottle, adding 80ml of ethanol, heating to reflux, refluxing for 20min, carrying out heat filtration, cooling the filtrate to 18 ℃, carrying out suction filtration after crystallization, drying the filter cake to obtain 9.21g of solid, then adding the 9.21g of solid into the 250ml four-mouth bottle, adding 187.5ml of isopropanol and 12.5ml of water, controlling the temperature to be 20-30 ℃, stirring for 3h, carrying out suction filtration, and drying the filter cake to obtain 8.22g of isoproterenol hydrochloride finished product. The purity of the finished product of isoproterenol hydrochloride is 99.92 percent, and the residue on ignition is 0.02 percent.

Comparative example 1

The comparative example provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102ml) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 200ml of methanol, stirring, cooling to 3 ℃, adding 3.85g (0.102mol) of sodium borohydride, reacting for 3 hours at 5-15 ℃, and detecting by TLC (thin layer chromatography) to show that the raw material (isopropyl adrenalone hydrochloride) still has more residues. Concentrating under reduced pressure to evaporate 160ml of methanol, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 2-3 with hydrochloric acid, filtering, and drying a filter cake to obtain 17.61g of the isoproterenol hydrochloride crude product. The purity of the isoproterenol hydrochloride crude product is 27.66 percent, and the raw material residue is 62.07 percent.

Comparative example 2

The comparative example provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102mol) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 200ml of acetonitrile, stirring, cooling to 3 ℃, adding 3.85g (0.102mol) of sodium borohydride, reacting for 3 hours at 2-18 ℃, and indicating that the reaction is not carried out by TLC (thin layer chromatography) and no target product is generated.

Comparative example 3

The comparative example provides a preparation method of a crude isoproterenol hydrochloride product, which specifically comprises the following steps:

s1, synthesizing isopropyl adrenalone hydrochloride by the method of the embodiment 1;

s2, adding 25.00g (0.102ml) of isopropyl adrenalone hydrochloride into a 500ml four-mouth bottle, adding 180ml of acetonitrile and 18ml of water, stirring, cooling to 2 ℃, adding 3.85g (0.102mol) of sodium borohydride, reacting for 3 hours at 5-15 ℃, and detecting by TLC (thin layer chromatography) to show that a large amount of raw material (isopropyl adrenalone hydrochloride) is remained. And (3) decompressing and concentrating to remove 170ml of acetonitrile and water, then adding 200ml of isopropanol into the concentrate, adjusting the pH value to 2-3 with hydrochloric acid, filtering, and drying the filter cake to obtain 18.25g of the isoproterenol hydrochloride crude product. The purity of the isoproterenol hydrochloride crude product is 37.34 percent, and the raw material residue is 62.40 percent.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.