Method for synthesizing lithocholic acid by taking BA as raw material

A synthesis method and technology of lithocholic acid, applied in the directions of steroids, organic chemistry, etc., can solve the problems of unsuitability for large-scale industrial production, low yield and high synthesis cost

Inactive Publication Date: 2021-04-09
JIANGSU JIAERKE PHARMA GRP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthetic method of lithocholic acid of the present invention is environmentally friendly, has simple steps, few side reactions, high yield, cheap and easy-to-obtain raw materials, and is suitable for industrialized production; Problems suitable for large-scale industrial production

Method used

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  • Method for synthesizing lithocholic acid by taking BA as raw material
  • Method for synthesizing lithocholic acid by taking BA as raw material
  • Method for synthesizing lithocholic acid by taking BA as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The preparation of embodiment one formula (2) compound

[0080] (1-1) Add BA (10.00g, 30.26mmol), TEMPO (47mg, 0.30mmol), 100mL DCM, NaHCO in sequence to a 500mL single-necked flask 3 (3.43g, 40.85mmol), H of tetrabutylammonium bromide (977mg, 3.03mmol) 2 O (40 mL) solution and NCS (4.65 g, 34.80 mmol) were reacted at 0° C. for 5 h. After TLC detects that the raw material has reacted completely, add sodium thiosulfate pentahydrate solution (1.3g sodium thiosulfate pentahydrate / 25mLH 2 O), stirred at 10°C for 20min, separated, the aqueous phase was extracted with dichloromethane (50mL×3), the organic phases were combined, added 120mL of 1% sodium hydroxide solution, stirred for 30min, separated, and the aqueous phase was extracted with dichloromethane (50 mL) back-extracted once, washed with water, and concentrated under reduced pressure to obtain compound 2 (light yellow solid, 9.50 g, molar yield 95%).

[0081] (1-2) Add BA (5.0 g, 15.13 mmol), IBX (8.5 g, 30.26 mmo...

Embodiment 2

[0082] The preparation of embodiment two formula (3) compound

[0083] (2-1) Compound 2 (1.0 g, 3.04 mmol), ethoxyformylmethylenetriphenylphosphine (2.12 g, 6.08 mmol) and toluene (15 mL) were successively added into a 100 mL one-necked flask, and the reaction was refluxed for 4 h. TLC detected that the reaction was complete, concentrated under reduced pressure, and purified by silica gel column chromatography (PE / EA=3 / 1, v / v) to obtain compound 3 (1.15 g, white solid, molar yield 98%).

[0084] (2-2) Sodium hydride (913mg, 22.83mmol) and 50mL THF were successively added into a 250mL single-necked flask, and after stirring for 15min, triethyl phosphonoacetate (4.5mL, 22.83mmol) was successively added, compound 2 (5.00g, 15.22 mmol), reacted at 0°C for 4h. After the reaction of the raw material was detected by TLC, it was concentrated under reduced pressure and slurried with methanol to obtain compound 3 (white solid, 5.76 g, molar yield 95%).

[0085] (2-3) Compound 2 (1.0 g...

Embodiment 3

[0087] The preparation of embodiment three formula (4) compound

[0088] (3-1) Add compound 3 (1.0g, 2.51mmol), 20mL isopropanol, 1.0g Raney Ni, sodium tert-butoxide (482mg, 5.02mmol), H 2 After replacement, pressurize to 4.0 MPa, and react at 90° C. for 48 hours. After the reaction was detected by TLC, acetic acid was added to adjust the pH to 5, filtered with diatomaceous earth, the filtrate was concentrated under reduced pressure and dissolved in ethyl acetate (30mL), washed with water and saturated sodium chloride solution successively, dried over anhydrous sodium sulfate, and decompressed. Concentrate and perform column chromatography (PE:EA=2:1) ​​to obtain lithocholic acid (841 mg, white solid, molar yield 89%).

[0089] (3-2) Add compound 3 (1.0g, 2.51mmol), 20mL isopropanol, 1.0g Raney Ni, sodium tert-butoxide (482mg, 5.02mmol) and H 2 After replacement, pressurize to 4.0MPa, and react at 90°C for 24h. After the reaction of the raw materials was detected by TLC, ac...

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Abstract

The invention discloses a lithocholic acid synthesis method, which comprises the following steps: by using 21-hydroxy-20-methyl pregnane-4-ene-3-ketone (BA) as a raw material, carrying out an oxidation reaction and a Wittig reaction, and carrying out a reduction reaction to synthesize lithocholic acid; or after the oxidation reaction and the Wittig reaction, carrying out a hydrogenation reduction reaction, a carbonyl reduction reaction and a hydrolysis reaction to synthesize the lithocholic acid. The lithocholic acid synthesis method has the advantages of environmental protection, simple steps, few side reactions, high yield, cheap and easily available raw materials, and suitableness for industrial production; the method solves the problems of high synthesis cost, low yield and unsuitability for large-scale industrial production in the prior art.

Description

technical field [0001] The invention belongs to the field of organic chemistry, and in particular relates to a method for synthesizing lithocholic acid by using 21-hydroxy-20-methylpregn-4-en-3-one (BA) as a raw material. Background technique [0002] Lithocholic acid (3α-hydroxy-5β-cholanic acid, formula (4)) is a secondary bile acid, also known as cholelithic acid, which exists in the bile of higher vertebrates. important reference value. Lithocholic acid has a wide range of biological activities, such as activation of vitamin D receptors (J. 22, 7237–7242), activating TGR5 receptor, a relevant target for the treatment of diabetes (J.Med.Chem.2008, 51, 1831–1841), antibacterial and antifungal (Farmaco Sci.1984, 39, 305–315), Antiaging activity (Int. J. Mol. Sci. 2014, 15, 16522–16543). In particular, the compound also has anti-tumor activity. In recent years, it has been found that lithocholic acid can inhibit the mutation of DNA polymerase β, and reduce the chance of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07J9/00
CPCC07J9/005
Inventor 仇文卫顾向忠李晨晨叶如飞吴殊岚王杰
Owner JIANGSU JIAERKE PHARMA GRP CORP
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