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Novel method for synthesizing ulipristal acetate

A technology of ulipristal acetate and a new method, applied in the field of chemical pharmacy, can solve the problems of large steric hindrance, low yield, long steps, etc., and achieve the effects of ingenious conception, high yield and low cost

Inactive Publication Date: 2013-02-27
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The steps of this method are slightly longer, because the β-acetyl group is first introduced at the 17th position, resulting in greater steric hindrance, and when the format is added, the proportion of α addition becomes larger, making the overall yield low

Method used

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  • Novel method for synthesizing ulipristal acetate
  • Novel method for synthesizing ulipristal acetate
  • Novel method for synthesizing ulipristal acetate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Example 1 compound 3 Synthesis

[0057]

[0058] Add 11.5g of disodium hydrogen phosphate dodecahydrate into dichloromethane, then add 8.8mL of hexafluoroacetone, 15.8mL of 30%H 2 o 2 , stirred at 0°C for 1 h, added 10 g of the compound 2 , the solution was orange-yellow, and continued to stir at 0°C for 18 hours. TLC monitored that the reaction was complete, and added 50 mL of 10% Na 2 SO 3 , stirred for 15min, the dichloromethane layer was separated, and the water layer was extracted with 2*30mL of dichloromethane, and the dichloromethane layers were combined, 10%Na 2 SO 3 (2*50mL), washed with water (2*50mL), dried with 20g of anhydrous sodium sulfate, and concentrated to give 10.6g of pale yellow foamy solid. (Theory: 10.5g yield is 100%) HPLC measured 5α, 10α / 5β, 10β as 81:19.

Embodiment 2

[0059] Example 2 compound 4 Synthesis

[0060]

[0061] 10.6g (0.032mol) compound 3 After dissolving with 110mL redistilled THF, add 0.076eq CuCl at -20°C and stir for 30min. If CuCl is not dissolved, slowly add 24ml (1.5eq) of 2M tetrahydrofuran solution of 4-dimethylaminophenylmagnesium bromide dropwise. , continue to stir and react at -20°C for 3 hours, TLC monitors that the reaction is complete, add 100mL of saturated ammonium chloride solution to the reaction solution to terminate the reaction, add 200mL of dichloromethane under stirring, stir for 15min, separate the dichloromethane layer and the water layer Then extract with dichloromethane 3*50mL. The organic layers were combined, washed with 3*50 mL of saturated ammonium chloride solution, dried with 45 g of anhydrous sodium sulfate, and concentrated to obtain a black oil. Placed in the refrigerator, solids precipitated, added 100 mL of isopropyl ether and stirred for 3 hours, a light blue solid precipitated, fil...

Embodiment 3

[0062] Example 3 Compound 5 Synthesis

[0063]

[0064] 10.4g (0.023mol) compound 4 Add to 100ml of dry tetrahydrofuran, add 2eq18% sodium acetylide xylene solution under ice bath, after the addition is complete, turn to room temperature and stir for 4h, TLC monitors the reaction is complete, add saturated ammonium chloride solution, spin off most of the tetrahydrofuran under reduced pressure, Add ethyl acetate to extract 3 times, 50ml each time, combine, dry over anhydrous sodium sulfate, concentrate, add 100ml of isopropyl ether, stir, a solid precipitates, filter, and dry under vacuum at 50°C for 5h to obtain 11g of light blue solid . The yield is 100%.

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Abstract

The invention provides a novel method for synthesizing a progesterone receptor regulator, ulipristal acetate of formula I. According to the invention, the method has the advantages of ingenious conception, high yield and high purity, the cost is greatly reduced, and the method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of chemical pharmacy and relates to a new method for synthesizing progesterone receptor modulator ulipristal acetate. Background technique [0002] The compound ulipristal acetate (formula I ), chemical name: 17α-acetoxy-11β-(4-N,N-dimethylaminophenyl)-19-norpregna-4,9-diene-3,20-dione, common name : Ulipristal acetate, having the formula: [0003] [0004] On August 13, 2010, the U.S. Food and Drug Administration (FDA) approved a new molecular entity emergency contraceptive tablet named Ella, and its drug name is Ulipristal acetate, which is an acetate salt. This emergency contraceptive tablet can be taken within 120 hours (5 days) after intercourse without measures. Ella is a progesterone receptor blocker / antagonist whose main function is to inhibit or delay female ovulation. In June 2010, the FDA's Advisory Committee for Reproductive Health Drugs discussed the drug. Members of the committee voted ...

Claims

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Application Information

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IPC IPC(8): C07J41/00
CPCY02P20/55
Inventor 吴勇海俐余永国李晓岑
Owner SICHUAN UNIV
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