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A kind of 16a, the preparation method of 21-diacetyloxyprednisolone

A technology of diacetoxyprednisolone and dehydroprednisolone, applied in the fields of steroids and organic chemistry

Active Publication Date: 2020-12-11
HUNAN KEREY BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, generally speaking, there is not a kind of "avoiding the use of strong oxidizing agents such as potassium permanganate" in the prior art but can be efficient, environmentally friendly and inexpensive to prepare 16α-hydroxyprednisolone technology

Method used

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  • A kind of 16a, the preparation method of 21-diacetyloxyprednisolone

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Step A---preparation of epoxy:

[0044] In a 3000ml three-necked flask, add 100g of starting materials 17a-prednisolone dehydrogenacetate, 1000ml of ethyl acetate, stir at room temperature to completely dissolve the solid, and add dropwise 40g of ophthalmic acid at 25-30°C The peracid solution made of oxybenzoic acid and 500ml ethyl acetate is dropped in about 2-2.5 hours, and then kept at 25-30°C for 6-12 hours, TLC confirms the end point of the reaction, and the reaction is complete Finally, add a mixed solution of 400ml 5% sodium hydroxide and 100ml 10% sodium sulfite to neutralize and destroy the acid produced by the reaction and excess peroxyacid, then concentrate under reduced pressure below 50°C to recover 90-95% ethyl acetate ester, then lowered to room temperature, added 500ml of tap water, stirred and analyzed for 3-4 hours, filtered, the filtrate was discharged into the wastewater treatment tank, the filter cake was washed with water, and dried below 60°C to ...

Embodiment 2

[0053] Step A: Preparation of epoxy:

[0054] In a 3000ml three-necked flask, add 100g of starting material 17a-prednisolone dehydroxyacetate, 1000ml of chloroform, stir at room temperature to completely dissolve the solid, and add 40g of m-chloroperoxy The peracid solution made of benzoic acid and 500ml ethyl acetate was dropped in about 2-2.5 hours, and then kept at 25-30°C for 6-12 hours, and the end point of the reaction was confirmed by TLC. After the reaction, add Mixed solution of 400ml 5% sodium hydroxide and 100ml 10% sodium sulfite to neutralize and destroy the acid and excess peroxyacid, then concentrate under reduced pressure below 50°C to recover 90-95% chloroform and ethyl acetate The mixed solvent was lowered to room temperature, added 500ml of tap water, stirred and analyzed for 3-4 hours, filtered, the filtrate was discharged into the waste water treatment tank, the filter cake was washed with water, and dried below 60°C to obtain 16,17a-epoxyprednilacetate S...

Embodiment 3

[0063] Step A---preparation of epoxy:

[0064] In a 3000ml three-necked flask, add 100g of starting materials 17a-prednisolone dehydrogenacetate, 1000ml of DME, stir at room temperature to completely dissolve the solid, and add dropwise a solution containing 40g of peracetic acid and 500ml of DME at 25-30°C. The prepared peracid solution was dripped in about 2-2.5 hours, and then continued to keep warm at 25-30°C for 6-12 hours after the dripping, and TLC confirmed the reaction end point. After the reaction, add 400ml of 5% sodium hydroxide and 100ml of a mixed solution made of 10% sodium sulfite to neutralize and destroy the acid and excess peroxyacid produced by the reaction, then concentrate under reduced pressure below 50°C to recover 90-95% DME solvent, then lower it to room temperature, add 500ml of tap water, Stir and analyze in water for 3-4 hours, filter, discharge the filtrate into the waste water treatment tank, wash the filter cake with water, and dry below 60°C to...

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Abstract

The invention provides a method for preparing 16a,21-diacetoxyl prednisolone. The method comprises the steps: firstly, subjecting 17a-deshydroxy prednisolone acetate, which serves as a starting raw material, and organic peroxy acid to an epoxidation reaction at 16,17 sites in a first organic solvent, so as to prepare epoxide; then, subjecting the epoxide and glacial acetic acid to a ring-opening reaction under the catalysis of an acid catalyst in a second organic solvent, so as to prepare the target product, i.e., 16a, 21-diacetoxyl prednisolone. An intermediate, the 16a,21-diacetoxyl prednisolone of the 16a-hydroxyl prednisolone is prepared by the efficient, environment-friendly and cheap method.

Description

technical field [0001] The invention belongs to the preparation technology of steroid hormone drug intermediates, and specifically refers to a preparation method of 16a, 21-bisacetoxyprednisolone. Background technique [0002] 16a-hydroxyprednisolone (molecular formula C 21 h 28 o 6 ), chemically named 11b, 16a, 17a, 21-tetrahydroxy-pregna-1,4-diene-3,20-dione, is a key intermediate in the production of nedadrenoid steroid adrenocorticotropic hormone drugs , using it as a raw material, one-step condensation reaction with acetone can produce desonide, and one-step condensation reaction with n-butyraldehyde can produce budesonide. For example, budesonide is mainly used clinically for the treatment of many diseases such as various rhinitis, acute and chronic bronchitis, etc., with low side effects, good effect and broad market prospect. The traditional production method of 16a-hydroxyprednisolone is to use prednisolone as raw material, through 17,21-position diesterization,...

Claims

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Application Information

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IPC IPC(8): C07J5/00
CPCC07J5/0092
Inventor 甘红星胡爱国吴来喜
Owner HUNAN KEREY BIOTECH
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