阅读说明：本技术 一种中间体化合物及其制备方法和用途 (Intermediate compound and preparation method and application thereof ) 是由 谭问非 袁陈 杜全胜 杜祖银 于 2021-05-08 设计创作，主要内容包括：本发明提供了中间体化合物式5,并提供了通过插羰反应制备该中间体的方法。具体地提供了通过中间体式5制备中间体式6的方法,并进一步提供了通过中间体式5制备诺沙斯塔的方法。该制备方法原料易得,成本可控,适合工业化生产。(The present invention provides an intermediate compound of formula 5, and provides a method for preparing the intermediate by a carbonyl insertion reaction. Specifically provided are methods of making intermediate form 6 via intermediate form 5, and further provided are methods of making noxasta via intermediate form 5. The preparation method has the advantages of easily available raw materials and controllable cost, and is suitable for industrial production.)

1. An intermediate compound represented by formula 5:

wherein R is₁Is H or methyl, R₂Is OMs, OTf, OTs, Cl, Br or I, R₃Is H, C1-C6 alkyl, benzyl or substituted benzyl, R₄Is a substituted sulfonyl group.

2. An intermediate compound as claimed in claim 1, wherein R is₄Is Ms, Tf, phenylsulfonyl or substituted benzeneA sulfonyl group.

3. Use of an intermediate compound as claimed in claim 1 for the preparation of norxata.

4. A process for the preparation of an intermediate compound as claimed in claim 1, characterized in that it comprises:

the compound of the formula 4 and the compound of the formula 9 are subjected to coupling reaction to generate a compound of a formula 5,

wherein R is₁、R₂、R₃And R₄As defined in claim 1, R₆Hydroxyl, OTs, OMs, Cl, Br or I.

5. The method of claim 4, further comprising:

reacting the compound of the formula 3 with a Grignard reagent to generate a compound of a formula 4,

wherein R is₂As defined in claim 1, R₁Is methyl, R₆Is a hydroxyl group, and the hydroxyl group,

or

After the compound of the formula 3 reacts with the Grignard reagent, hydroxyl halogenation or hydroxyl sulfonylation is carried out to generate a compound of a formula 4,

wherein R is₂As defined in claim 1, R₁Is methyl, R₆OTs, OMs, Cl, Br or I.

6. A preparation method of an intermediate shown as a formula 6 is characterized by comprising the following steps:

compounds of formula 5 and R₅The OH and CO source are subjected to carbonyl insertion reaction under the catalysis of a catalyst to generate a compound shown in a formula 6,

wherein R is₁Is H or methyl, R₂Is OMs, OTf, OTs, Cl, Br or I, R₃Is H, C1-C6 alkyl, benzyl or substituted benzyl, R₄Is substituted sulfonyl, R₅Is C1-C6 alkyl, benzyl or substituted benzyl.

7. The production method according to claim 6, wherein the catalyst is one or more selected from the group consisting of palladium, palladium acetate, bistriphenylphosphine palladium dichloride, [1,1' -bis (diphenylphosphino) ferrocene ] palladium dichloride, tetratriphenylphosphine palladium, bis (acetonitrile) palladium dichloride, tris-dibenzylideneacetone dipalladium, and tetrakis (triphenylphosphine) palladium.

8. The method according to claim 7, wherein the catalyst further contains a phosphine ligand.

9. The production method according to claim 8, wherein the phosphine ligand is selected from one or more of bis-diphenylphosphinomethane, tributylphosphine, trimethoxy phosphine, tricyclohexyl phosphine.

10. A process for preparing a noxata of formula 8, comprising the steps of:

(1) compounds of formula 5 and R₅In-catalyst of OH and CO sourcesGenerating a compound shown in the formula 6 by a carbonyl insertion reaction under catalysis;

(2) carrying out alkali condensation and deprotection aromatization on the compound shown in the formula 6 in a solvent to generate a compound shown in a formula 7;

(3) exchanging the compound shown in the formula 7 with glycine or a metal salt of glycine to generate a compound shown in the formula 8, namely the nosaS;

wherein R is₁Is methyl, R₂Is OMs, OTf, OTs, Cl, Br or I, R₃Is H, C1-C6 alkyl, benzyl or substituted benzyl, R₄Is substituted sulfonyl, R₅Is C1-C6 alkyl, benzyl or substituted benzyl.

Technical Field

The invention belongs to the field of pharmaceutical chemistry, and particularly relates to an intermediate compound, a preparation method and application thereof, and a method for preparing Nossa through the intermediate.

Background

Noxastota is an inhibitor of Hypoxia Inducible Factor (HIF) prolyl hydroxylase, and increases the endogenous production of erythropoietin, thereby stimulating the production of hemoglobin and red blood cells. The drug was developed by febuxostat, usa, and used for treating anemia caused by Chronic Kidney Disease (CKD) in dialysis-dependent patients, and was globally approved in china in 12 months in 2018.

Various methods of preparation of noxatases have been disclosed in the prior art, for example in:

(1) the preparation route disclosed in patent document CN102977015A is as follows:

the route uses 210-220 ℃ high-temperature grinding reaction and-78 ℃ low-temperature reaction, the reaction conditions are harsh, and flammable reagents such as sodium metal, butyl lithium and the like are used, so that the problem of production safety exists; the reaction selectivity is poor, the separation and purification of isomers are difficult, and simultaneously, the yield is reduced to 2 percent due to the long whole route, so that the production cost is very high, and the industrial production is not facilitated.

(2) An improved preparation route is disclosed in patent document CN 103435546B:

the route takes 5-bromophenylphthalide as a raw material, and the overall reaction condition is mild; however, the reaction involves high-risk reaction steps such as catalytic hydrogenation and the like, which is not beneficial to industrial production; in addition, the reaction route is long, the market price of the starting material is about 1 ten thousand yuan/kg, the methyl introduction step after ring closing is long, and the production cost is high.

(3) Also disclosed in patent document CN104024227B is a preparation route as follows:

the starting materials of the route are easy to obtain, but the key reaction selectivity is low, so that the total yield is low, and the column chromatography method is adopted for purification, so that the production cost is increased, and the method is not suitable for large-scale production.

(4) Also disclosed in patent document CN104892509A is a preparation route as follows:

the reaction conditions of the route are mild, but protection and deprotection reactions are required to be carried out for many times in the process of introducing methyl into the reaction, so that the production cost is increased, and in the method, amino substitution product byproducts are easily generated in the process of introducing phenolic hydroxyl into phenyl, so that the purification of the final product is difficult, and the quality control risk is increased.

(5) Patent document CN106478503A also discloses a norxata intermediate: the preparation route of 4-hydroxy-1-methyl-7-phenoxy-3-isoquinolinecarboxylic acid (ester) is as follows:

this route still has some drawbacks:

1) in the preparation process, the hydrazino compound of ethyl carbazate shown in the formula 2 is used, and the compound can bring genotoxic impurities and increase the risk of the safety of the final product;

2) the high-temperature reaction at 120 ℃ is used in the process of preparing the compound of the formula II, so that the energy consumption is increased;

3) the starting material 3-methyl-5-bromoisobenzofuran-1 (3H) -one of formula I has a selling price of about 1g/650 dollars, and is expected to have a selling price of at least 10 ten thousand yuan per kilogram, and the raw materials for preparing the compound of formula I, namely 2-hydroxy-5-bromoacetophenone of formula 1 and diethyl iodobenzene of formula 4, have the cost price of 4000 yuan/kg and 8000 yuan/kg respectively, and are high in production cost.

Aiming at the defects of the prior art, a novel preparation method with easily available raw materials, safe process, economic cost and higher yield is developed, in particular to a process which can meet the requirement of industrial production, so as to overcome the defects of the prior art and have important significance for controlling the cost and the accessibility of medicines.

Disclosure of Invention

The invention provides an intermediate compound, a preparation method and application thereof, and a method for preparing Nossa by the intermediate.

Specifically, the invention provides the following technical scheme:

an intermediate compound is provided, as shown in formula 5:

wherein R is₁Is H or methyl, R₂Is OMs, OTf, OTs, Cl, Br or I, R₃Is H, C1-C6 alkyl, benzyl, substituted benzyl, aryl or substituted aryl, R₄Is a substituted sulfonyl group. In some embodiments, R₄Is Ms, Tf, phenylsulfonyl or substituted phenylsulfonyl. In some embodiments, R₂Is OTf, OTs, I or Br. In some embodiments R₃Is methyl, ethyl or isopropyl. In some embodiments, R₄P-toluenesulfonyl and p-chlorobenzenesulfonyl.

The present invention provides the use of the intermediate compound formula 5 in the synthesis of a medicament for the preparation of norxastita.

The present invention provides a process for preparing an intermediate compound, formula 5, comprising the steps of:

the compound of the formula 4 and the compound of the formula 9 are subjected to coupling reaction to generate a compound of a formula 5,

wherein R is₁Is H or methyl, R₂Is OMs, OTf, OTs, Cl, Br or I, R₃Is H, C1-C6 alkyl, benzyl, substituted benzyl, aryl or substituted aryl, R₄Is substituted sulfonyl, R₆Hydroxyl, OTs, OMs, Cl, Br or I. In some embodiments, R₄Is Ms, Tf, phenylsulfonyl or substituted phenylsulfonyl. In some embodiments, R₄P-toluenesulfonyl and p-chlorobenzenesulfonyl. In some embodiments, the reaction is further supplemented with an auxiliary selected from DEAD/PPh₃、DIAD/PPh₃Or (2-hydroxybenzyl) diphenylphosphine oxide.

The present invention provides a process for preparing an intermediate compound, formula 5, further comprising the steps of:

nucleophilic addition reaction is carried out on the compound shown in the formula 3 and a Grignard reagent to generate a compound shown in a formula 4,

wherein R is₁Is methyl, R₂Is OMs, OTf, OTs, Cl, Br or I, R₆Is a hydroxyl group. The Grignard reagent is R₁MgX, wherein X is halogen.

Or

After the compound of the formula 3 reacts with the Grignard reagent, hydroxyl halogenation or hydroxyl sulfonylation is carried out to generate a compound of a formula 4,

wherein R is₁Is methyl, R₂Is OMs, OTf, OTs, Cl, Br or I, R₆OTs, OMs, Cl, Br or I. Wherein the Grignard reagent is R₁MgX, wherein X is halogen.

The present invention further provides a process for preparing the intermediate compound formula 5, further comprising the steps of:

(1) reacting the compound shown in the formula 1 with paraformaldehyde in the presence of magnesium chloride and triethylamine to generate a compound shown in the formula 2;

(2) reacting the compound shown in the formula 2 with acid anhydride, halogen or acyl halide to generate a compound shown in a formula 3;

wherein R is₂As defined above.

In another aspect, the invention provides a process for preparing intermediate 6, a compound of formula 5 and R₅The OH and CO source are subjected to carbonyl insertion reaction under the catalysis of a catalyst to generate a compound shown in a formula 6,

wherein R is₁Is H or methyl, R₂Is OMs, OTf, OTs, Cl, Br or I, R₃Is H, C1-C6 alkyl, benzyl, substituted benzyl, aryl or substituted aryl, R₄Is substituted sulfonyl, R₅Is C1-C6 alkyl, benzyl or substituted benzyl. In some embodiments, R₄Is Ms, Tf, phenylsulfonyl or substituted phenylsulfonyl. In some embodiments, R₄P-toluenesulfonyl and p-chlorobenzenesulfonyl. The catalyst is selected from palladium, palladium acetate, bis (triphenylphosphine) palladium dichloride, [1,1' -bis (diphenylphosphino) ferrocene]One or more of palladium dichloride, tris (dibenzylideneacetone) dipalladium, tetrakis (triphenylphosphine) palladium, palladium dichloride and bis (acetonitrile) palladium dichloride. The CO source is carbon monoxide or a material capable of providing carbonyl groups to the reaction and may be selected from metal carbonyl complexes, such as Co₂(CO)₈、W(CO)₆And formic acid esters. In some embodiments, the catalyst further comprises a phosphine ligand selected from the group consisting of bis-diphenylphosphinomethane, tributylphosphine, trimethoxy-phosphorus, tricyclohexyl-phosphine, 1, 2-bis (diphenylphosphino) ethane, 1, 3-bis (diphenylphosphinopropane),1, 3-bis (diisopropylphosphine) propane and tri-tert-butylphosphine. In some embodiments, the base used is selected from one or more of triethylamine, trimethylamine, potassium carbonate, sodium carbonate. In some embodiments, the solvent used for the reaction is selected from one or more of DMF, DMSO, THF, 1, 4-dioxane, toluene, benzene, dichloromethane, acetonitrile. In some embodiments, the amount of the palladium catalyst is in the range of 0.5% to 10%, preferably in the range of 0.5% to 5% of the amount of the compound of formula 5. In some embodiments, the ratio of phosphine ligand to palladium catalyst charge ranges from 1:1 to 1:3(w/w), preferably ranges from 1:1 to 1:2 (w/w). In some embodiments, R₅The molar amount of OH is 3 times or more of the molar amount of the compound of formula 5 charged. In some embodiments, the volume of solvent used is greater than the volume of R used₅Volume of OH.

In another aspect, the present invention provides a method of preparing a noxata, comprising the steps of:

(1) compounds of formula 5 and R₅Performing carbonyl insertion reaction on OH and a CO source under the catalysis of a catalyst to generate a compound shown in a formula 6;

(2) carrying out alkali condensation and deprotection aromatization on the compound shown in the formula 6 in a solvent to generate a compound shown in a formula 7;

(3) the compound of formula 7 is exchanged with glycine or a metal salt of glycine to produce a compound of formula 8, noxata.

Wherein the reactants and reaction conditions of step (1) are as defined above. The solvent used in the step (2) is selected from one or more of methanol, ethanol, isopropanol, n-butanol and tert-butanol; the base is selected from one or more of sodium methoxide, sodium ethoxide, potassium tert-butoxide, sodium hydride, lithium bis (trimethylsilyl) amide, sodium bis (trimethylsilyl) amide and potassium bis (trimethylsilyl) amide. In some embodiments, the metal glycinate of step (3) is sodium glycinate.

The "C1-C6 alkyl group" as referred to herein is a straight or branched chain alkyl group having 1 to 6 carbon atoms, such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, hexyl.

A "substituted benzyl" as referred to herein is a benzyl group having one or more substituents which are halo, nitro, alkyl or alkoxy, such as 3-chlorobenzyl, 3-fluorobenzyl, 3-bromobenzyl, 2-nitrobenzyl, 2-bromobenzyl, 4-bromobenzyl, p-nitrobenzyl, 2-fluorobenzyl, 4-chloro-3-trifluoromethylbenzyl, 2, 5-difluorobenzyl, 3- (trifluoromethyl) benzyl, 4- (trifluoromethoxy) benzyl, 2, 3-dichlorobenzyl, 4-methylbenzyl, 4-methoxybenzyl or 2-methyl-4-ethoxybenzyl.

"substituted aryl" as referred to herein is aryl having one or more substituents selected from halo, alkyl, haloalkyl, cycloalkyl, heterocyclyl, heteroaryl, alkoxy, such as 2-trifluoromethylphenyl, 3, 5-bis (trifluoromethyl) phenyl, 3-trifluoromethylphenyl, 4-trifluoromethylphenyl, 2, 6-bis (trifluoromethyl) phenyl, fluorophenyl, difluorophenyl, trifluorophenyl, chlorophenyl, dichlorophenyl, trichlorophenyl, bromophenyl, tribromophenyl, dibromophenyl, fluorochlorophenyl, fluorochlorobenzyl, chlorobromophenyl.

The substituent of the substituted sulfonyl described in the invention is alkyl, halo, aryl, such as methylsulfonyl, trifluoromethanesulfonyl.

The substituted benzenesulfonyl group is benzenesulfonyl with one or more substituents, such as alkyl, nitro, fluorine substituent and chlorine substituent, such as p-toluenesulfonyl and p-chlorobenzenesulfonyl.

The preparation route provided by the invention has the advantages that:

1. provides a new drug synthesis intermediate;

2. the preparation method has mild reaction conditions, does not need to use harsh reaction conditions, and does not use high-toxicity materials such as hydrazino and the like or expensive materials such as diethyl iodobenzene and the like;

3. the raw materials are easy to obtain, the cost is low, and the sale price of the initial material is about 400-;

4. the whole reaction route is simplified, the efficiency is higher, the economy is higher, and the method is suitable for industrial production.

Interpretation of terms:

ms: methylsulfonyl radical

Tf: trifluoromethanesulfonyl radical

Ts: p-toluenesulfonyl group

DEAD: azanedicarboxylic acid diethyl ester

The DIAD: diisopropyl azodicarboxylate

Detailed Description

In order to further illustrate the present invention and to facilitate an understanding thereof, only some examples are provided and will be described in detail. It will be understood by those skilled in the art that the following examples are not intended to limit the scope of the present invention.

Example 1

Example 1A

Synthesis of N- (1- (5-phenoxy-2- (((trifluoromethyl) sulfonyl) oxy) phenyl) ethyl) -N-p-toluenesulfonyl glycine methyl ester:

p-toluenesulfonylglycine methyl ester (3.36g, 13.8mmol) and 2- (1-hydroxyethyl) -4-phenoxyphenyltriflate (5.00g, 13.8mmol) were added to a reaction flask, followed by THF30mL and PPh₃(3.62g, 13.8mmol), stirring under ice bath conditions, slowly adding DEAD (2.41g, 13.8mmol), stirring at room temperature for reaction until TLC detection reaction is complete, adding 20mL of water and ethyl acetate into a reaction bottle, extracting and separating liquid, taking an organic phase, concentrating the organic phase under reduced pressure to dryness to obtain a target product with the yield of 80%.¹H-NMR(400MHz,CDCl₃):δ7.70(d,2H,PhSO₂ 2,6-H),7.38(t,2H,PhO 3,5-H)，7.24(d,2H,PhSO₂ 3,5-H)，7.19(t,1H,PhO 4-H)，7.15(d,1H,Ph 5-H)，7.05(d,1H,Ph 6-H)，6.98(d,2H,PhO 2,6-H)，6.84(d,1H,Ph3-H)，5.29(q,1H,CH)，4.10(q,2H,CH₂)，3.61(s,3H,CO₂CH₃)，2.40(s,3H,PhSO₂ 4-CH₃)，1.47(d,3H,CH₃)。

Example 1B

Synthesis of N- (1- (5-phenoxy-2- (((trifluoromethyl) sulfonyl) oxy) phenyl) ethyl) -N-p-toluenesulfonyl glycine methyl ester:

after 20mL of THF was added to the reaction flask, p-toluenesulfonylglycine methyl ester (2.76g, 11.35mmol), 2- (1- ((methylsulfonyl) oxy) ethyl) -4-phenoxyphenyltriflate (5.00g, 11.35mmol), PPh were added in this order₃(2.98g and 11.35mmol), stirring under ice bath conditions, slowly adding DEAD (1.98g and 11.35mmol), after the addition, stirring at room temperature for reaction until the TLC detection reaction is complete, adding 20mL of water into a reaction bottle, extracting and separating by ethyl acetate, taking an organic phase, and concentrating under reduced pressure to dryness to obtain the target product. The yield thereof was found to be 60%. The structure of the prepared compound is confirmed by hydrogen nuclear magnetic resonance spectroscopy.

Example 1C

Synthesis of N- (1- (5-phenoxy-2- (((trifluoromethyl) sulfonyl) oxy) phenyl) ethyl) -N-p-toluenesulfonyl glycine methyl ester:

after 20mL of DMF was added to the reaction flask, p-toluenesulfonylglycine methyl ester (3.83g, 15.76mmol), potassium carbonate (5.44g,39.39mmol), and 2- (1-chloroethyl) -4-phenoxyphenyl trifluoromethanesulfonate (5.00g, 13.13mmol) were added in this order, and after the addition, the reaction was stirred at room temperature until the TLC detection reaction was completed, and the target product was obtained by column chromatography and post-treatment. The yield thereof was found to be 75%. The structure of the prepared compound is confirmed by hydrogen nuclear magnetic resonance spectroscopy.

Example 1D

Synthesis of N- (1- (5-phenoxy-2- (((trifluoromethyl) sulfonyl) oxy) phenyl) ethyl) -N-p-chlorobenzenesulfonylglycine methyl ester:

p-Chlorobenzenesulfonylglycine methyl ester (4.26g, 16.16mmol) and 2- (1-hydroxyethyl) -4-phenoxyphenyltriflate (5.85g, 16.16mmol) were added to a reaction flask, followed by addition of 30mL of THF and PPh₃(4.24g, 16.16mmol), stirring under ice bath conditions, slowly adding DEAD (2.81g, 16.16mmol), stirring at room temperature for reaction until TLC detection reaction is complete, adding 20mL of water and ethyl acetate into a reaction bottle, extracting and separating liquid, taking an organic phase, concentrating the organic phase under reduced pressure to dryness, and recrystallizing to obtain the target product with the yield of 86%.

Example 2

Example 2A

Synthesis of methyl 2- (1- ((N- (2-methoxy-2-oxoethyl) -4-methylphenyl) sulfonylamino) ethyl) -4-phenoxybenzoate:

n- (1- (5-phenoxy-2- (((trifluoromethyl) sulfonyl) oxy) phenyl) ethyl) -N-p-toluenesulfonyl glycine methyl ester (6.40g, 10.9mmol) was added to the reaction flask, followed by 20mL DMF, 8mL MeOH, and Et₃N (3.30g, 32.7mmol), and then 0.32g of palladium acetate with the mass ratio of 5% to the raw material and 0.64g of 1, 3-diphenyl phosphopropane with the mass ratio of 10% to the raw material were added in this order. Introducing carbon monoxide into a reaction bottle, replacing gas in the bottle twice, heating to 80 ℃ for reaction overnight, detecting by TLC to almost completely react, removing methanol under reduced pressure, extracting with ethyl acetate, separating liquid, drying the organic phase with anhydrous sodium sulfate, concentrating under reduced pressure to dryness, and performing column chromatography to obtain the target product with the yield of 80%. MS M/z515[ M + NH)₄]⁺。¹H-NMR(400MHz,CDCl₃):δ7.96(d,2H,PhSO₂ 2,6-H)，7.81(d,1H,Ph 6-H)，7.68(d,2H,PhSO₂ 3,5-H)，7.41(t,2H,PhO 3,5-H)，7.35(d,1H,Ph 5-H)，7.22(t,1H,PhO 4-H)，7.00(d,2H,PhO 2,6-H)，6.78(dd,1H,Ph 3-H)，6.18(q,1H,CH)，4.12(q,2H,CH₂)，3.90(s,3H,PhCO₂CH₃)，3.64(s,3H,CO₂CH₃)，2.42(s,3H,PhSO₂ 4-CH₃)，1.42(d,3H,CH₃)。

Example 2B

Synthesis of methyl 2- (1- ((N- (2-ethoxy-2-oxoethyl) -4-methylphenyl) sulfonylamino) ethyl) -4-phenoxybenzoate:

n- (1- (5-phenoxy-2- (((trifluoromethyl) sulfonyl) oxy) phenyl) ethyl) -N-p-toluenesulfonyl glycine ethyl ester (6.40g, 10.6mmol) was added to the reaction flask, followed by 20mL DMF, 8mL MeOH, and Et₃N (3.22g, 31.9mmol), and then 0.064g of palladium acetate with the mass ratio of 1 percent to the raw material and 0.064g of 1, 3-diphenyl phosphopropane with the mass ratio of 1 percent to the raw material are added in sequence. Introducing carbon monoxide into a reaction bottle, replacing gas in the bottle twice, heating to 80 ℃ for reaction until the TLC detection reaction is almost complete, removing methanol under reduced pressure, extracting and separating liquid by ethyl acetate, drying an organic phase by anhydrous sodium sulfate, concentrating under reduced pressure to be dry, and performing column chromatography to obtain a target product with the yield of 80%. MS M/z 529[ M + NH₄]⁺。

Example 2C

Synthesis of ethyl 2- (1- ((N- (2-ethoxy-2-oxoethyl) -4-methylphenyl) sulfonylamino) ethyl) -4-phenoxybenzoate:

n- (1- (5-phenoxy-2- (((trifluoromethyl) sulfonyl) oxy) phenyl) ethyl) -N-p-toluenesulfonyl glycine ethyl ester (6.40g, 10.6mmol) was added to the reaction flask, followed by 30mL DMF, 12mL EtOH and Et respectively₃N (3.22g, 31.9mmol), and then 0.128g of palladium acetate with the mass ratio of 2% to the raw material and 0.256g of 1, 3-diphenyl phosphopropane with the mass ratio of 4% to the raw material were added in this order. Adding oxygen toIntroducing carbon into a reaction bottle, replacing gas in the bottle twice, heating to 50 ℃ for reaction, detecting by TLC until the reaction is almost complete, removing ethanol under reduced pressure, extracting and separating liquid by ethyl acetate, drying an organic phase by anhydrous sodium sulfate, concentrating under reduced pressure to dryness, and performing column chromatography to obtain a target product with the yield of 72%. MS M/z 543[ M + NH₄]⁺。

Example 2D

Synthesis of methyl 2- (1- ((N- (2-isopropoxy-2-oxoethyl) -4-methylphenyl) sulfonylamino) ethyl) -4-phenoxybenzoate:

n- (1- (5-phenoxy-2- (((trifluoromethyl) sulfonyl) oxy) phenyl) ethyl) -N-tosylglycinate isopropyl ester (6.40g, 10.4mmol) was added to the reaction flask, followed by 35mL of DMF, 12mL of MeOH, and Et₃N (3.15g, 31.2mmol), then sequentially adding 0.32g of palladium acetate with the mass ratio of 5% to the raw material and 0.64g of 1, 3-diphenyl phosphopropane with the mass ratio of 10% to the raw material, introducing carbon monoxide into a reaction bottle, replacing gas in the bottle twice, heating to 80 ℃ for reaction until the TLC detection reaction is almost complete, removing methanol under reduced pressure, extracting and separating liquid by ethyl acetate, drying an organic phase by anhydrous sodium sulfate, concentrating under reduced pressure to dryness, and performing column chromatography to obtain a target product with the yield of 72%. MS M/z 543[ M + NH₄]⁺。

Example 2E

Synthesis of methyl 2- (1- ((N- (2-methoxy-2-oxoethyl) -4-methylphenyl) sulfonylamino) ethyl) -4-phenoxybenzoate:

n- (1- (2-iodo-5-phenoxyphenyl) ethyl) methyl-N-tolueneglycine (6.40g, 11.3mmol) was added to a reaction flask, and 30mL of DMF, 12mL of MeOH, and Et were added thereto₃N (3.30g, 32.7mmol), then adding 0.192g of palladium acetate with the mass ratio of 3 percent to the raw material and the raw material in sequence0.32g of 1, 3-bis diphenylphosphinopropane with the weight ratio of 5 percent, introducing carbon monoxide into a reaction bottle, replacing gas in the bottle twice, heating to 80 ℃ for reaction until the TLC detection reaction is almost complete, removing methanol under reduced pressure, extracting and separating liquid by ethyl acetate, drying an organic phase by anhydrous sodium sulfate, concentrating under reduced pressure to be dry, and performing column chromatography to obtain a target product with the yield of 85 percent. MS M/z515[ M + NH)₄]⁺。

Example 2F

Synthesis of methyl 2- (1- ((N- (2-methoxy-2-oxoethyl) -4-chlorophenyl) sulfonylamino) ethyl) -4-phenoxybenzoate:

n- (1- (5-phenoxy-2- (((trifluoromethyl) sulfonyl) oxy) phenyl) ethyl) -N-p-chlorobenzenesulfonylglycine methyl ester (6.00g, 9.87mmol) was added to a reaction flask, followed by 20mL of DMF, 6mL of MeOH, and Et₃N (2.99g, 29.61mmol), and then 0.30g of palladium acetate with the mass ratio of 5% to the raw material and 0.60g of 1, 3-diphenyl phosphopropane with the mass ratio of 10% to the raw material were added in this order. Introducing carbon monoxide into a reaction bottle, replacing gas in the bottle twice, heating to 80 ℃ for reaction overnight, detecting by TLC to almost completely react, removing methanol under reduced pressure, extracting with ethyl acetate, separating liquid, drying the organic phase with anhydrous sodium sulfate, concentrating under reduced pressure to dryness, and performing column chromatography to obtain the target product with the yield of 90%. MS M/z 535.2[ M + NH ]₄]⁺。

Example 3

(1) Synthesis of 2-hydroxy-5-phenoxybenzaldehyde:

magnesium chloride (76.69g, 805.54mmol) and 200mL acetonitrile were added to a reaction flask, followed by Et under stirring₃N (216.96g, 2148.11mmol), p-phenoxy phenol (100g, 537.03mmol) and paraformaldehyde (112.89g, 3759.20mmol) were added, followed by stirring at 90 ℃ under reflux. Reaction was checked by TLCAfter the reaction is completed, the pH is adjusted to weak acidity by using dilute hydrochloric acid, and a target product is obtained by extraction, liquid separation, reduced pressure concentration and acetonitrile recrystallization, wherein the yield is 50%.

(2) Synthesis of 2-formyl-4-phenoxyphenyl triflate:

adding 2-hydroxy-5-phenoxybenzaldehyde (20.00g, 93.36mmol), dichloromethane (100 mL), Et₃Adding N (28.29g, 280.06mmol) and trifluoromethanesulfonic anhydride (79.10g, 280.06mmol) into a reaction flask, detecting by TLC that the reaction is complete, adding water for extraction, and concentrating under reduced pressure to dryness to obtain the target product with yield of 80%.¹H-NMR(400MHz,CDCl₃):δ10.22(s,1H,CHO)，7.51(d,1H,Ph5-H)，7.45(t,2H,PhO 3,5-H)，7.31(dd,1H,Ph 3-H)，7.27(d,1H,Ph 6-H)，7.23(t,1H,PhO 4-H)，7.09(d,2H,PhO 2,6-H)。

Example 4

Example 4A

Synthesis of 2- (1-hydroxyethyl) -4-phenoxyphenyl trifluoromethanesulfonate:

adding 2-formyl-4-phenoxyphenyl trifluoromethanesulfonate (2.00g, 5.78mmol) and 10mL of THF into a reaction bottle, measuring 8mL of 1M THF solution of methyl magnesium bromide under the protection of argon under the condition of zero temperature, slowly adding the THF solution into the reaction bottle, detecting the reaction completion by TLC, adding a saturated ammonium chloride solution and ethyl acetate for extraction, and concentrating under reduced pressure until the reaction is dry to obtain a target product with the yield of 80%.¹H-NMR(400MHz,CDCl₃):δ7.41(t,2H,PhO 3,5-H)，7.31(d,1H,Ph 5-H)，7.19(m,2H,Ph 6-H,PhO4-H)，7.07(d,2H,PhO 2,6-H)，6.93(dd,1H,Ph 3-H)，5.21(q,1H,CH)，1.51(d,3H,CH₃)。

Example 4B synthesis of 2- (1-chloroethyl) -4-phenoxyphenyl triflate:

adding 20ml of LPCM into a reaction bottle, sequentially adding 2- (1-hydroxyethyl) -4-phenoxyphenyl trifluoromethanesulfonate (6.00g,16.56mmol) and pyridine (2.62g, 33.12mol), stirring in an ice bath, slowly adding triphosgene (2.46g, 8.28mmol), continuously reacting in the ice bath until the TLC detection reaction is completed, washing the reaction solution with dilute hydrochloric acid, extracting the water phase with DCM, merging organic phases, and concentrating the organic phases under reduced pressure to dryness to obtain the target product. The yield thereof was found to be 85%. MS M/z 381[ M + H ]]⁺。

Example 4C

Synthesis of 2- (1- ((methylsulfonyl) oxy) ethyl) -4-phenoxyphenyl trifluoromethanesulfonate:

after 20ml of EDCM was added into a reaction flask, 2- (1-hydroxyethyl) -4-phenoxyphenyl trifluoromethanesulfonate (6.00g,16.56mmol) and triethylamine (3.35g,33.12mol) were sequentially added, stirred at-20 ℃ and methanesulfonyl chloride (2.28g,19.87mmol) was slowly added, and after completion of the addition, the reaction was carried out at room temperature until TLC detection reaction was completed, an appropriate amount of water was added, and after DCM extraction, organic phase was concentrated to dryness under reduced pressure to obtain the target product with a yield of 87%. MS M/z 441[ M + H]⁺。

Example 5

Example 5A

Synthesis of 1-methyl-4-hydroxy-7-phenoxyisoquinoline-3-carboxylic acid methyl ester:

adding methyl 2- (1- ((N- (2-methoxy-2-oxyethyl) -4-methylphenyl) sulfonylamino) ethyl) -4-phenoxybenzoate (4.88g, 9.8mmol) into a reaction bottle, adding 20mL of methanol and sodium methoxide (1.59g, 29.4mmol), heating to 50 ℃ for reaction until the TLC detection reaction is complete,adding 2N hydrochloric acid and saturated NaHCO in turn₃Filtering the water solution, and drying a filter cake to obtain a target product with the yield of 70%. MS M/z 310[ M + H]⁺。

Example 5B:

synthesis of ethyl 1-methyl-4-hydroxy-7-phenoxyisoquinoline-3-carboxylate:

adding methyl 2- (1- ((N- (2-ethoxy-2-oxyethyl) -4-methylphenyl) sulfonamide) ethyl) -4-phenoxybenzoate (4.88g, 9.5mmol) into a reaction bottle, adding 20mL of ethanol and sodium ethoxide (1.95g, 28.6mmol), heating to 50 ℃, reacting until TLC detection reaction is complete, and sequentially adding 2N glacial acetic acid and saturated NaHCO₃Filtering the water solution, and drying a filter cake to obtain a target product with the yield of 65%. MS M/z 324[ M + H]⁺。

Example 5C

Synthesis of ethyl 1-methyl-4-hydroxy-7-phenoxyisoquinoline-3-carboxylate:

adding 2- (1- ((N- (2-ethoxy-2-oxyethyl) -4-methylphenyl) sulfamide) ethyl) -4-phenoxybenzoic acid ethyl ester (4.90g, 9.5mmol) into a reaction bottle, adding 20mL of ethanol and sodium ethoxide (1.96g, 28.6mmol), heating to 50 ℃, reacting until TLC detection reaction is complete, and sequentially adding 2N hydrochloric acid and saturated NaHCO₃Filtering the water solution, and drying a filter cake to obtain a target product with the yield of 65%. MS M/z 324[ M + H]⁺。

Example 5D

Synthesis of 1-methyl-4-hydroxy-7-phenoxyisoquinoline-3-carboxylic acid methyl ester:

2- (1- ((N- (2-methyl)Adding 5.06g of methyl oxy-2-oxyethyl) -4-chlorophenyl) sulfonamide) ethyl) -4-phenoxybenzoate (9.77 mmol) into a reaction bottle, adding 20mL of methanol and sodium methoxide (1.58g of 29.31mmol), heating to 50 ℃, reacting until the TLC detection reaction is completed, and sequentially adding 2N hydrochloric acid and saturated NaHCO₃Filtering the water solution, and drying a filter cake to obtain a target product with the yield of 70%. MS M/z 310[ M + H]⁺。

Example 6

Synthesis of noxata:

adding 1-methyl-4-hydroxy-7-phenoxyisoquinoline-3-carboxylic acid methyl ester (2.00g, 6.47mmol) into a reaction bottle, adding 10mL of methanol and sodium glycinate (1.88g, 19.40mmol), heating to 60 ℃, reacting until the TLC detection reaction is complete, adjusting the pH to about 4 with hydrochloric acid, and filtering to obtain a target product with the yield of 78%. MS M/z 351[ M-H ]]^-。¹H-NMR(400MHz,DMSO):δ13.33(s,1H,OH)，12.79(s,1H,COOH)，9.12(s,1H,CONH)，8.30(d,1H,Isoquinoline 5-H)，7.63(d,1H,Isoquinoline6-H)，7.54(d,1H,Isoquinoline 8-H)，7.49(t,2H,Ph 3,5-H)，7.26(t,1H,Ph 4-H)，7.19(d,2H,Ph 2,6-H)，4.05(d,2H,CH₂)，2.71(s,3H,CH₃)。