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Preparation method of edoxaban tosylate and isomers thereof

A technology for toluenesulfonic acid and isomers, which is applied in the field of preparation of edoxaban tosylate and its isomers, and can solve problems such as the influence of drug quality

Active Publication Date: 2021-02-05
江苏华阳制药有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Impurities are easily produced during the synthesis of drugs and during drug degradation, which can have a serious impact on the quality of drugs

Method used

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  • Preparation method of edoxaban tosylate and isomers thereof
  • Preparation method of edoxaban tosylate and isomers thereof
  • Preparation method of edoxaban tosylate and isomers thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] N 1 -(5-chloropyridin-2-yl)-N 2 -((1S,2R,4S)-4-((dimethylamino)carbonyl)-2-(((5-methyl-4,5,6,7-tetrahydrothiazolo[5,4-c] Pyridin-2-yl) formyl) amino) cyclohexyl) oxalamide p-toluenesulfonic acid monohydrate, i.e. the preparation method of edoxaban tosylate (1S, 2R, 4S), comprising the following steps:

[0073] S1. Add 200g of compound (I) to 1L of acetone, reflux and dissolve for 1h, dissolve 192.1g of compound (II) in 0.5L of acetone and add dropwise to the reaction solution, slowly cool down to 40°C for 2h, then cool down to Suction filtration at 20-25°C, blow-dry the filter cake at 40-45°C to obtain 270g of solid, add 8 times acetone for recrystallization, then cool down to 20-25°C for crystallization, suction filtration, blow-dry the filter cake at 40-45°C 170 g of compound (III) were obtained,

[0074]

[0075] S2. Add 170 g of compound (III) to 3 L of dichloromethane, add 3 L of 2N HCl solution and stir for 2 h, separate the layers, back-extract the aqueous ...

Embodiment 2

[0102] N1-(5-chloropyridin-2-yl)-N2-{(1R,2R,4S)-4-(dimethylaminocarbonyl)-2-[(5-methyl-4,5,6,7- Tetrahydrothiazolo[5,4-c]pyridin-2-yl)carboxamido]cyclohexyl}oxalamide p-toluenesulfonic acid monohydrate, i.e. (1R,2R,4S of edoxaban tosylate ) configuration of the diastereomer (epimer) preparation method, comprising the following steps:

[0103] Steps S1-S5 are the same as steps S1-S5 in the preparation method of edoxaban tosylate (1S, 2R, 4S);

[0104] S6, add 15g Add to 500ml of dichloromethane, add triethylamine, cool down and stir, drop the temperature down to 0°C, add 18g MSCl dropwise, stir at 20-25°C for 2 hours after the dropwise addition, drop down to 0°C, add 250ml 0.5N hydrochloric acid dropwise, dropwise add Add 500ml of dichloromethane for extraction and separation, wash the organic layer with 1L of purified water and 1L of saturated sodium chloride, dry with 50g of anhydrous magnesium sulfate, and concentrate the filtrate to dryness by suction filtration to obtai...

Embodiment 3

[0123] N1-(5-chloropyridin-2-yl)-N2-{(1R,2S,4R)-4-(dimethylaminocarbonyl)-2-[(5-methyl-4,5,6,7- Synthesis of tetrahydrothiazolo[5,4-c]pyridin-2-yl)carboxamido]cyclohexyl}oxalamide p-toluenesulfonic acid monohydrate, i.e. (1R,2S of edoxaban tosylate ,4R) The preparation method of the enantiomer of configuration comprises the following steps:

[0124] S1, with compound (I) and compound (II) as starting raw material, the chemical name of compound (I) is 3-cyclohexene-1-carboxylic acid, structural formula is Compound (II) is

[0125] Add 200g of compound (I) to 1L of acetone, reflux and dissolve for 1h, dissolve 192.1g of compound (II) in 0.5L of acetone and add dropwise to the reaction solution, slowly lower the temperature to 40°C for 2h, then cool down to 20~ Suction filtration at 25°C, blow-dry the filter cake at 40-45°C to obtain 270g solid, add 8 times acetone for recrystallization, then cool down to 20-25°C for crystallization, suction filtration, blow-dry the filter c...

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Abstract

The invention discloses a preparation method of edoxaban tosylate and isomers thereof. By taking a compound (I) and a compound (II) as starting materials, the method can be used to prepare any one ofhigh-purity edoxaban tosylate (1S, 2R, 4S), edoxaban tosylate enantiomers (1R, 2S, 4R), edoxaban tosylate epimers (1R, 2R, 4S) and edoxaban tosylate epimers (1S, 2S, 4R). Effective guarantee is provided for process research and quality control of the edoxaban tosylate bulk drug and related preparations, the preparation method is suitable for commercialization, the produced edoxaban tosylate bulk drug is high in purity and has great significance and practical value, and the production of the edoxaban tosylate bulk drug and the control of drug quality are facilitated.

Description

technical field [0001] The invention belongs to the technical field of medicines, and in particular relates to a preparation method of edoxaban tosylate and its isomers. Background technique [0002] Edoxaban tosylate (Edoxaban), chemical name N 1 -(5-chloropyridin-2-yl)-N 2 -((1S,2R,4S)-4-((dimethylamino)carbonyl)-2-(((5-methyl-4,5,6,7-tetrahydrothiazolo[5,4-c] Pyridin-2-yl) formyl) amino) cyclohexyl) oxalamide p-toluenesulfonic acid monohydrate, the structural formula of edoxaban tosylate (1S, 2R, 4S) is: [0003] [0004] On January 8, 2015, edoxaban tosylate monohydrate (trade name: Savaysa) developed by Japan's Daiichi Sankyo Co., Ltd. was approved by the US Food and Drug Administration (FDA) listed. The drug is an oral once-daily selective coagulation factor Xa inhibitor for the prevention of venous thromboembolism (VTE) after major orthopedic surgery. [0005] Impurities are easily produced during the synthesis of drugs and during drug degradation, which have ...

Claims

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Application Information

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IPC IPC(8): C07D513/04
CPCC07D513/04C07B2200/07
Inventor 何树青徐进
Owner 江苏华阳制药有限公司
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