阅读说明：本技术 氨基烷基硅烷的合成方法 (Synthesis method of amino alkyl silane ) 是由 葛建民 武利斌 闫彩桥 许晓丹 闫朋飞 杨世雄 赵光华 高山 林胜赛 李庆占 邢 于 2021-09-07 设计创作，主要内容包括：本发明公开了氨基烷基硅烷的合成方法,涉及电池电解液添加剂技术领域,所述合成方法是以五甲基二硅烷与烯丙基羟乙基醚为原料,经加成反应后,再经酯化反应、取代反应和氨基化反应,生成所述氨基烷基硅烷。本发明的氨基烷基硅烷的合成方法,采用五甲基二硅烷与烯丙基羟乙基醚为起始原料,反应过程简单,中间体易纯化,反应中所用到的原料易获得,反应过程较现有技术更为温和、安全,最终产物收率可达70.34％,纯度可达99.5％。(The invention discloses a synthesis method of amino alkyl silane, which relates to the technical field of battery electrolyte additives. The synthesis method of the amino alkyl silane adopts pentamethyl disilane and allyl hydroxyethyl ether as initial raw materials, has simple reaction process, easy purification of intermediates, easy obtainment of raw materials used in the reaction, milder and safer reaction process compared with the prior art, and the yield of the final product can reach 70.34 percent and the purity can reach 99.5 percent.)

1. The synthesis method of the amino alkyl silane is characterized in that: the amino alkyl silane is N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethylamine;

the synthesis method comprises the following steps which are carried out in sequence:

1) under the protection of inactive gas, taking pentamethyl disilane and allyl hydroxyethyl ether, and obtaining 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol through addition reaction under the catalysis of chloroplatinic acid, wherein the specific chemical reaction formula is as follows:

2) taking 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethanol and methanesulfonyl chloride to carry out esterification reaction, and then carrying out substitution reaction with sodium iodide to obtain 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] iodoethane, wherein the specific chemical reaction formula is as follows:

3) taking 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethyl iodide and dimethylamine, and carrying out amination reaction under alkaline conditions to obtain the N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethylamine, wherein the specific chemical reaction formula is as follows:

2. the method of synthesizing aminoalkylsilanes of claim 1, wherein: the step 2) comprises the following specific steps:

21) dissolving 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol and triethylamine in sufficient dichloromethane, cooling to 0-10 ℃, maintaining the temperature of 0-10 ℃, slowly dripping dichloromethane solution of methanesulfonyl chloride, and heating to room temperature for esterification reaction after dripping is finished to obtain an intermediate I, wherein the specific chemical reaction formula is as follows:

22) dissolving the intermediate I and sodium iodide in acetone, heating and refluxing for substitution reaction to obtain 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] iodoethane, wherein the specific chemical reaction formula is as follows:

3. the method of synthesizing aminoalkylsilanes according to claim 2, wherein:

in the step 21), the molar ratio of the 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol to the methanesulfonyl chloride to the triethylamine is 1: 1.0-1.2: 2.0 to 2.5;

in step 22), the molar ratio of the intermediate I to sodium iodide is 1: 2 to 3.

4. A method of synthesizing an aminoalkylsilane as claimed in claim 2 or 3 wherein:

in the step 21), after the esterification reaction is finished, adding water for washing and phase splitting, and drying and concentrating an obtained organic phase to obtain the intermediate I;

and step 22), after the substitution reaction is finished, concentrating, adding dichloromethane for dissolving, washing with water, drying and concentrating to obtain the 2- [3- (1,1,3,3, 3-pentamethyl-1-disilyloxy) propoxy ] iodoethane.

5. A method of synthesizing an aminoalkylsilane as claimed in any one of claims 1 to 3 wherein: dissolving dimethylamine and anhydrous potassium carbonate in dry N, N-dimethylformamide, dropwise adding a N, N-dimethylformamide solution of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] at the temperature of less than or equal to 30 ℃, and heating to 50-70 ℃ after dropwise adding to carry out amination reaction to obtain the N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethylamine.

6. The method of synthesizing aminoalkylsilanes of claim 5, wherein: in the step 3), the molar ratio of the 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] iodoethane to the potassium carbonate is 1: 0.5 to 0.6.

7. The method of synthesizing an aminoalkylsilane as claimed in claim 1, 2, 3 or 6 wherein: in the step 3), the molar ratio of the 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] iodoethane to the dimethylamine is 1: 1.2 to 2.0.

8. The method of synthesizing an aminoalkylsilane as claimed in claim 1, 2, 3 or 6 wherein: and 3) after the amination reaction is finished, pouring the obtained system into a large amount of ice water, adding ethyl acetate for extraction, carrying out phase separation, drying and concentrating the obtained ethyl acetate phase to obtain the N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethylamine.

9. The method of synthesizing an aminoalkylsilane as claimed in claim 1, 2, 3 or 6 wherein: in the step 1), the temperature of the addition reaction is 80-100 ℃.

10. The method of synthesizing an aminoalkylsilane as claimed in claim 1, 2, 3 or 6 wherein: in the step 1), the molar ratio of the allyl hydroxyethyl ether to the pentamethyldisilane is 1: 1.0 to 1.2; the molar ratio of the allyl hydroxyethyl ether to the chloroplatinic acid is 1: 0.002 to 0.003.

Technical Field

The invention relates to the technical field of battery electrolyte additives, in particular to a synthesis method of amino alkyl silane.

Background

The electrolyte of the lithium battery is usually prepared by using an organic solvent, generally a high-purity organic solvent, electrolyte lithium salt, necessary additives and other raw materials according to a certain proportion under a certain condition, and amino alkyl silane is often added in the production process of the electrolyte to improve the adaptability of electrolysis by the stability of the amino alkyl silane.

When the amino-containing alkyl silane is synthesized, the yield and the purity are low due to the harsh reaction conditions.

Disclosure of Invention

The present invention is directed to a method for synthesizing aminoalkylsilanes, which solves the problems set forth above in the background.

In order to achieve the purpose, the invention provides the following technical scheme:

the synthesis method of the amino alkyl silane is characterized in that: the amino alkyl silane is N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethylamine;

the synthesis method comprises the following steps which are carried out in sequence:

1) under the protection of inactive gas, taking pentamethyl disilane and allyl hydroxyethyl ether, and obtaining 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol through addition reaction under the catalysis of chloroplatinic acid, wherein the specific chemical reaction formula is as follows:

2) taking 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethanol and methanesulfonyl chloride to carry out esterification reaction, and then carrying out substitution reaction with sodium iodide to obtain 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] iodoethane, wherein the specific chemical reaction formula is as follows:

3) taking 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethyl iodide and dimethylamine, and carrying out amination reaction under alkaline conditions to obtain the N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethylamine, wherein the specific chemical reaction formula is as follows:

further, the step 2) comprises the following specific steps:

21) dissolving 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol and triethylamine in sufficient dichloromethane, cooling to 0-10 ℃, maintaining the temperature of 0-10 ℃, slowly dripping dichloromethane solution of methanesulfonyl chloride, and heating to room temperature for esterification reaction after dripping is finished to obtain an intermediate I, wherein the specific chemical reaction formula is as follows:

22) dissolving the intermediate I and sodium iodide in acetone, heating and refluxing for substitution reaction to obtain 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] iodoethane, wherein the specific chemical reaction formula is as follows:

further, in step 21), the molar ratio of the 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol to the methanesulfonyl chloride to the triethylamine is 1: 1.0-1.2: 2.0 to 2.5;

in step 22), the molar ratio of the intermediate I to sodium iodide is 1: 2 to 3.

Further, in step 21), after the esterification reaction is completed, water is added for washing and phase splitting, and the obtained organic phase is dried and concentrated to obtain the intermediate I;

and step 22), after the substitution reaction is finished, concentrating, adding dichloromethane for dissolving, washing with water, drying and concentrating to obtain the 2- [3- (1,1,3,3, 3-pentamethyl-1-disilyloxy) propoxy ] iodoethane.

Further, the specific process of the step 3) is to take dimethylamine and anhydrous potassium carbonate to dissolve in dry N, N-dimethylformamide, dropwise add a N, N-dimethylformamide solution of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] at the temperature of less than or equal to 30 ℃, and after dropwise addition, raise the temperature to 50-70 ℃ for amination reaction to obtain the N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethylamine.

Further, the molar ratio of the 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] iodoethane to potassium carbonate is 1: 0.5 to 0.6.

Further, in the step 3), the molar ratio of the 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] iodoethane to the dimethylamine is 1: 1.2 to 2.0;

further, in the step 3), after the amination reaction is completed, pouring the obtained system into a large amount of ice water, adding ethyl acetate for extraction, carrying out phase separation, drying and concentrating the obtained ethyl acetate phase to obtain the N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethylamine.

Further, in the step 1), the temperature of the addition reaction is 80-100 ℃.

Further, in the step 1), the molar ratio of the allyl hydroxyethyl ether to the pentamethyldisilane is 1: 1.0 to 1.2;

the molar ratio of the allyl hydroxyethyl ether to the chloroplatinic acid is 1: 0.002 to 0.003;

after the addition reaction is finished, the residual reactant needs to be removed by decompression and concentration.

Compared with the prior art, the invention has the beneficial effects that:

the synthesis method of the amino alkyl silane adopts pentamethyl disilane and allyl hydroxyethyl ether as initial raw materials, has simple reaction process, easy purification of intermediates, easy obtainment of raw materials used in the reaction, milder and safer reaction process compared with the prior art, and the yield of the final product can reach 70.34 percent and the purity can reach 99.5 percent.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

the synthesis method of the amino alkyl silane comprises the following steps:

1) under the protection of nitrogen, 81.59g (0.55mol) pentamethyl disilane and 51.07g (0.5mol) allyl hydroxyethyl ether are mixed and stirred for 0.5h at room temperature, then 0.41g (0.001mol) chloroplatinic acid is added, the temperature is slowly raised to 90 ℃, the temperature is maintained at 90 ℃ for addition reaction for 5h, residual reactants are removed by decompression and concentration, 112.85g 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethanol is obtained, the yield is 90.11%, the obtained 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethanol is directly subjected to the next reaction without refining, and the specific chemical reaction formula is as follows:

21) 50.40(0.44mol) g of methanesulfonyl chloride is dissolved in 150mL of dichloromethane to obtain dichloromethane solution of methanesulfonyl chloride;

100.19g (0.4mol) of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol and 80.95g (0.8mol) of triethylamine are dissolved in 250mL of dichloromethane, the temperature is reduced to 0 ℃, dichloromethane solution of methanesulfonyl chloride is slowly dripped while maintaining the temperature at 0 ℃, after the dripping is finished, the temperature is raised to room temperature for esterification reaction for 30min, after the esterification reaction is finished, 200mL of water is added for washing and phase separation, the obtained organic phase is dried by anhydrous magnesium sulfate and concentrated under reduced pressure, 125.71g of intermediate I is obtained, the yield is 95.65%, and the specific chemical reaction formula is as follows:

22) adding 115g (0.35mol) of the intermediate I and 131.15g (0.875mol) of sodium iodide into 500mL of acetone, heating to reflux for substitution reaction for 6h, after the substitution reaction is finished, concentrating, adding 300mL of dichloromethane into the obtained concentrate for dissolving, then adding 200mL of water for washing, carrying out phase separation, drying the obtained dichloromethane phase by anhydrous magnesium sulfate, and concentrating under reduced pressure to obtain 110.52g of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethyl iodide, wherein the yield is 87.62 percent, and the specific chemical reaction formula is as follows:

3) 108g (0.3mol) of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] is dissolved in 300mL of dry N, N-dimethylformamide to obtain a solution of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] in N, N-dimethylformamide;

dissolving 20.29g (0.45mol) of dimethylamine and 20.73g (0.15mol) of anhydrous potassium carbonate in dry N, N-dimethylformamide, dropwise adding a 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] N, N-dimethylformamide solution at 20 ℃, continuously maintaining the temperature for 20 ℃ after dropwise adding is finished, stirring and reacting for 1h, then slowly heating to 60 ℃, maintaining the temperature for 60 ℃ to carry out an amination reaction for 6h, pouring the obtained system into a large amount of ice water (1000 mL in the embodiment) after the amination reaction is finished, preventing the temperature from raising to generate a side reaction, then adding 500mL of ethyl acetate for extraction and phase separation, drying and concentrating the obtained ethyl acetate phase by anhydrous magnesium sulfate to obtain 78.91g of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ethylamine with the yield of 94.76% and the purity of 99.7%, and the specific chemical reaction formula is as follows:

the total yield of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethylamine was 71.57%.

Example two:

the synthesis method of the amino alkyl silane comprises the following steps:

1) under the protection of nitrogen, 89.01g (0.6mol) of pentamethyl disilane and 51.07g (0.5mol) of allyl hydroxyethyl ether are mixed and stirred for 0.5h at room temperature, then 0.61g (0.0015mol) of chloroplatinic acid is added, the temperature is slowly raised to 80 ℃, the temperature is maintained at 80 ℃ for addition reaction for 6h, the residual reactant is removed by decompression and concentration, 111.96g of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol is obtained, the yield is 89.40%, and the obtained 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol is directly subjected to the next reaction without refining.

21) 50.40(0.44mol) g of methanesulfonyl chloride is dissolved in 150mL of dichloromethane to obtain dichloromethane solution of methanesulfonyl chloride;

100.19g (0.4mol) of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol and 101.19g (1mol) of triethylamine are dissolved in 250mL of dichloromethane, the temperature is reduced to 5 ℃, dichloromethane solution of methanesulfonyl chloride is slowly dripped while maintaining the temperature of 5 ℃, after the dripping is finished, the temperature is raised to room temperature for esterification reaction for 28min, after the esterification reaction is finished, 200mL of water is added for washing and phase separation, the obtained organic phase is dried by magnesium sulfate and concentrated under reduced pressure, 126.14g of intermediate I is obtained, and the yield is 95.98%;

22) adding 115g (0.35mol) of the intermediate I and 136.40g (0.91mol) of sodium iodide into 500mL of acetone, heating to reflux for substitution reaction for 5h, after the substitution reaction is finished, concentrating, adding 300mL of dichloromethane into the obtained concentrate for dissolving, adding 200mL of water for washing, carrying out phase separation, drying the obtained dichloromethane phase by anhydrous magnesium sulfate, and concentrating under reduced pressure to obtain 110.97g of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethyl iodide, wherein the yield is 87.98%.

3) 108g (0.3mol) of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] is dissolved in 300mL of dry N, N-dimethylformamide to obtain a solution of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] in N, N-dimethylformamide;

dissolving 22.99g (0.51mol) of dimethylamine and 23.50g (0.17mol) of anhydrous potassium carbonate in dry N, N-dimethylformamide, dropwise adding a solution of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] in N, N-dimethylformamide at the temperature of 30 ℃, continuously maintaining the temperature of 30 ℃ for stirring and reacting for 0.5h after dropwise adding is finished, slowly heating to 50 ℃, maintaining the temperature of 50 ℃ for carrying out amination reaction for 6.5h, pouring the obtained system into a large amount of ice water (1000 mL in the embodiment) after amination reaction is finished, preventing temperature rise from generating side reaction, adding 500mL of ethyl acetate for extraction and phase separation, drying the obtained ethyl acetate phase by anhydrous magnesium sulfate, concentrating under reduced pressure to obtain 77.64g of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ethylamine in 93.24% yield and 99.7% purity.

The total yield of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethylamine was 70.38%.

Example three:

the synthesis method of the amino alkyl silane comprises the following steps:

1) under the protection of nitrogen, 74.18g (0.5mol) of pentamethyldisilane and 51.07g (0.5mol) of allyl hydroxyethyl ether are mixed and stirred for 0.5h at room temperature, then 0.49g (0.0012mol) of chloroplatinic acid is added, the temperature is slowly raised to 100 ℃, the temperature is maintained at 100 ℃ for addition reaction for 5.5h, the residual reaction product is removed by decompression and concentration, 112.73g of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol is obtained, the yield is 90.01%, and the obtained 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol is directly subjected to the next reaction without refining.

21) 54.98(0.48mol) g of methanesulfonyl chloride is dissolved in 150mL of dichloromethane to obtain dichloromethane solution of methanesulfonyl chloride;

100.19g (0.4mol) of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol and 93.09g (0.92mol) of triethylamine are dissolved in 250mL of dichloromethane, the temperature is reduced to 2 ℃, dichloromethane solution of methanesulfonyl chloride is slowly dripped at the temperature of 2 ℃, the temperature is raised to room temperature after the dripping is finished to carry out esterification reaction for 25min, after the esterification reaction is finished, 200mL of water is added for washing and phase separation, the obtained organic phase is dried by anhydrous magnesium sulfate and concentrated under reduced pressure, 125.35g of intermediate I is obtained, and the yield is 95.38%;

22) adding 115g (0.35mol) of the intermediate I and 104.92g (0.7mol) of sodium iodide into 500mL of acetone, heating to reflux for substitution reaction for 8h, after the substitution reaction is finished, concentrating, adding 300mL of dichloromethane into the obtained concentrate for dissolving, adding 200mL of water for washing, carrying out phase separation, drying the obtained dichloromethane phase by anhydrous magnesium sulfate, and concentrating under reduced pressure to obtain 109.81g of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethyl iodide with the yield of 87.06%.

3) 108g (0.3mol) of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] is dissolved in 300mL of dry N, N-dimethylformamide to obtain a solution of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] in N, N-dimethylformamide;

dissolving 16.23g (0.36mol) of dimethylamine and 24.88g (0.18mol) of anhydrous potassium carbonate in dry N, N-dimethylformamide, dropwise adding a solution of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] in N, N-dimethylformamide at 15 ℃, continuously maintaining the temperature at 15 ℃ after dropwise adding, stirring and reacting for 0.5h, slowly heating to 65 ℃, maintaining the temperature at 65 ℃ for amination reaction for 6h, pouring the obtained system into a large amount of ice water (1000 mL in the embodiment) after amination reaction is completed, preventing temperature rise from generating side reaction, then adding 500mL of ethyl acetate for extraction and phase separation, drying the obtained ethyl acetate phase by anhydrous magnesium sulfate, concentrating under reduced pressure to obtain 78.52g of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ethylamine in 94.30% yield and 99.6% purity.

The total yield of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethylamine was 70.48%.

Example four:

the synthesis method of the amino alkyl silane comprises the following steps:

1) 78.63g (0.53mol) pentamethyldisilane and 51.07g (0.5mol) allyl hydroxyethyl ether are mixed and stirred for 0.5h at room temperature under the protection of nitrogen, then 0.53g (0.0013mol) chloroplatinic acid is added, the temperature is slowly raised to 85 ℃, the temperature is maintained at 85 ℃ for addition reaction for 7h, residual reactants are removed by decompression and concentration, 112.54g 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethanol is obtained, the yield is 89.86%, and the obtained 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethanol is directly subjected to the next reaction without purification.

21) 48.11(0.42mol) g of methanesulfonyl chloride is dissolved in 150mL of dichloromethane to obtain dichloromethane solution of methanesulfonyl chloride;

100.19g (0.4mol) of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol and 85.00g (0.84mol) of triethylamine are dissolved in 250mL of dichloromethane, the temperature is reduced to 4 ℃, dichloromethane solution of methanesulfonyl chloride is slowly dripped at the temperature of 4 ℃, the temperature is raised to room temperature after the dripping is finished to carry out esterification reaction for 28min, after the esterification reaction is finished, 200mL of water is added for washing and phase separation, the obtained organic phase is dried by anhydrous magnesium sulfate and concentrated under reduced pressure, 125.45g of intermediate I is obtained, and the yield is 95.45%;

22) adding 115g (0.35mol) of the intermediate I and 125.91g (0.84mol) of sodium iodide into 500mL of acetone, heating to reflux for substitution reaction for 5.5h, after the substitution reaction is finished, concentrating, adding 300mL of dichloromethane into the obtained concentrate for dissolving, adding 200mL of water for washing, carrying out phase separation, drying the obtained dichloromethane phase by anhydrous magnesium sulfate, and concentrating under reduced pressure to obtain 110.23g of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] iodoethane, wherein the yield is 87.39%.

3) 108g (0.3mol) of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] is dissolved in 300mL of dry N, N-dimethylformamide to obtain a solution of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] in N, N-dimethylformamide;

dissolving 18.93g (0.42mol) of dimethylamine and 22.11g (0.16mol) of anhydrous potassium carbonate in dry N, N-dimethylformamide, dropwise adding a 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] N, N-dimethylformamide solution at 25 ℃, continuously maintaining 25 ℃ after dropwise adding, stirring and reacting for 0.5h, slowly heating to 70 ℃, maintaining 70 ℃ for amination reaction for 5.5h, pouring the obtained system into a large amount of ice water (1000 mL in the embodiment) after amination reaction is completed, preventing temperature rise from generating side reaction, adding 500mL of ethyl acetate for extraction and phase separation, drying the obtained ethyl acetate phase by anhydrous magnesium sulfate, concentrating under reduced pressure to obtain 78.14g of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ethylamine in 93.84% yield and 99.5% purity.

The total yield of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethylamine was 70.34%.

Example five:

the synthesis method of the amino alkyl silane comprises the following steps:

1) 84.56g (0.57mol) pentamethyldisilane and 51.07g (0.5mol) allyl hydroxyethyl ether are mixed and stirred for 0.5h at room temperature under the protection of nitrogen, then 0.57g (0.0014mol) chloroplatinic acid is added, the temperature is slowly raised to 90 ℃, the temperature is maintained at 90 ℃ for addition reaction for 5h, residual reactants are removed by decompression and concentration, 113.01g of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethanol is obtained, the yield is 90.23%, and the obtained 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxyl) propoxy ] ethanol is directly subjected to the next reaction without refining.

21) Dissolving 52.69(0.46mol) g of methanesulfonyl chloride in 150mL of dichloromethane to obtain a dichloromethane solution of methanesulfonyl chloride;

100.19g (0.4mol) of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol and 89.05g (0.88mol) of triethylamine are dissolved in 250mL of dichloromethane, the temperature is reduced to 10 ℃, 10 ℃ is maintained, dichloromethane solution of methanesulfonyl chloride is slowly dripped, after the dripping is finished, the temperature is raised to room temperature for esterification reaction for 25min, after the esterification reaction is finished, 200mL of water is added for washing and phase separation, the obtained organic phase is dried by anhydrous magnesium sulfate and concentrated under reduced pressure, 125.36g of intermediate I is obtained, and the yield is 95.38%;

22) adding 115g (0.35mol) of the intermediate I and 157.38g (1.05mol) of sodium iodide into 500mL of acetone, heating to reflux for carrying out substitution reaction for 6.5h, after the substitution reaction is finished, concentrating, adding 300mL of dichloromethane into the obtained concentrate for dissolving, adding 200mL of water for washing, carrying out phase separation, drying the obtained dichloromethane phase by anhydrous magnesium sulfate, and concentrating under reduced pressure to obtain 110.66g of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethyl iodide, wherein the yield is 87.73%.

3) 108g (0.3mol) of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] is dissolved in 300mL of dry N, N-dimethylformamide to obtain a solution of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] in N, N-dimethylformamide;

dissolving 27.05g (0.6mol) of dimethylamine and 20.73g (0.15mol) of anhydrous potassium carbonate in dry N, N-dimethylformamide, dropwise adding a solution of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] in N, N-dimethylformamide at 15 ℃, continuously maintaining the 15 ℃ for stirring and reacting for 0.5h after dropwise adding is finished, slowly heating to 55 ℃, maintaining the 55 ℃ for amination reaction for 7h, pouring the obtained system into a large amount of ice water (1000 mL in the embodiment) after amination reaction is finished, preventing temperature rise from generating side reaction, then adding 500mL of ethyl acetate for extraction and phase separation, drying the obtained ethyl acetate phase by anhydrous magnesium sulfate, and concentrating under reduced pressure to obtain 78.43g of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ethylamine in 94.19% yield and 99.6% purity.

The total yield of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethylamine was 71.12%.

Example six:

the synthesis method of the amino alkyl silane comprises the following steps:

1) under the protection of nitrogen, 83.08g (0.56mol) of pentamethyldisilane and 51.07g (0.5mol) of allyl hydroxyethyl ether are mixed and stirred at room temperature for 0.5h, then 0.41g (0.001mol) of chloroplatinic acid is added, the temperature is slowly raised to 95 ℃, the temperature is maintained at 95 ℃ for addition reaction for 6h, the residual reactant is removed by decompression and concentration, 112.89g of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol is obtained, the yield is 90.14%, and the obtained 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol is directly subjected to the next reaction without purification.

21) 45.82(0.4mol) g of methanesulfonyl chloride is dissolved in 150mL of dichloromethane to obtain dichloromethane solution of methanesulfonyl chloride;

100.19g (0.4mol) of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethanol and 91.14g (0.96mol) of triethylamine are dissolved in 250mL of dichloromethane, the temperature is reduced to 3 ℃, dichloromethane solution of methanesulfonyl chloride is slowly dripped at the temperature of 3 ℃, the temperature is raised to room temperature after the dripping is finished to carry out esterification reaction for 35min, 200mL of water is added after the esterification reaction is finished, the solution is washed and split, the obtained organic phase is dried by anhydrous magnesium sulfate and concentrated under reduced pressure, 15.89g of intermediate I is obtained, and the yield is 95.79%;

22) adding 115g (0.35mol) of the intermediate I and 121.41g (0.81mol) of sodium iodide into 500mL of acetone, heating to reflux for substitution reaction for 5.5h, after the substitution reaction is finished, concentrating, adding 300mL of dichloromethane into the obtained concentrate for dissolving, adding 200mL of water for washing, carrying out phase separation, drying the obtained dichloromethane phase by anhydrous magnesium sulfate, and concentrating under reduced pressure to obtain 110.78g of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethyl iodide, wherein the yield is 87.83%.

3) 108g (0.3mol) of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] is dissolved in 300mL of dry N, N-dimethylformamide to obtain a solution of 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] in N, N-dimethylformamide;

21.64g (0.48mol) of dimethylamine and 22.80g (0.165mol) of anhydrous potassium carbonate are dissolved in dry N, N-dimethylformamide, 2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] N, N-dimethylformamide solution is dropwise added at 25 ℃, the 25 ℃ is continuously maintained and stirred for reaction for 0.5h after the dropwise addition is finished, then the temperature is slowly increased to 60 ℃, the 60 ℃ is maintained for amination reaction for 6h, after the amination reaction is finished, the obtained system is poured into a large amount of ice water (1000 mL in the embodiment) to prevent the temperature rise from generating side reaction, 500mL of ethyl acetate is added for extraction and phase separation, the obtained ethyl acetate phase is dried by anhydrous magnesium sulfate and concentrated under reduced pressure to obtain 77.99g of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ethylamine in 93.66% yield and 99.7% purity.

The total yield of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethylamine was 71.02%.

Comparative example:

the finished product of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethylamine was purchased from the market, and the product split was 54.12% and the purity was 98.0%.

The yields and purities of the final products of examples one to six were compared with those of the comparative example, and the comparison results are shown in table 1:

as can be seen from Table 1, the yield and purity of N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy ] ethylamine produced by the synthesis method of aminoalkylsilane of the present invention are higher than those of commercially available products.

TABLE 1

Application experiments:

ternary material NCM (622) lithium is used as a positive electrode material, a negative electrode adopts mesocarbon microbeads, current collectors of the positive electrode and the negative electrode are distributed into aluminum foils and copper foils, a diaphragm adopts a ceramic diaphragm to form a soft package battery, after electrolyte is injected, the soft package battery is assembled in a glove box, and the test is carried out after the soft package battery is kept stand for 8 hours. And respectively carrying out charging and discharging at the constant temperature of 25 ℃ and at the temperature of 1/10C 3.0V to 4.2V to activate the battery, thus obtaining the battery to be tested. The electrolytes tested included base electrolyte E1 and electrolyte E2, the compositions of which are as follows:

1. basic electrolyte E1

EC：Solution-1：DEC＝3：3：4(v:v:v)，LiPF₆：1.0M，0.5％LiFSI，1％VC

2. Electrolyte E2

EC：Solution-1：DEC＝3：3：4(v:v:v)，LiPF₆: 1.0M, 0.5% LiFSI, 1% VC, 1% N, N-dimethyl-2- [3- (1,1,3,3, 3-pentamethyl-1-disiloxy) propoxy]Ethylamine (ethylamine)

And (3) testing results:

1. the test results after 60 ℃ cycling were as follows:

TABLE 2

2. The batteries were placed in a low temperature cabinet, the temperature was controlled at-30 ℃ or-40 ℃ respectively, the resting time was 240min, and then the capacity retention rate of the batteries was measured.

TABLE 3

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.