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ChemicalBook CAS DataBase List 17-Hydroxy-1a,2a-methylenepregna-4,6-diene-3,20-dione acetate

17-Hydroxy-1a,2a-methylenepregna-4,6-diene-3,20-dione acetate synthesis

2synthesis methods
-

Yield:-

Reaction Conditions:

in chloroform at 58;Temperature;

Steps:

1-3
Acetyl reaction:Draw chloroform into the reactor,Acetic anhydride,Adding cyclopropyl hydrolyzate,PTS,The temperature is raised to 58 ° C and refluxed for 5 to 6 hours.TLC to the raw material reaction,Down to room temperature,Add water to wash,Still for 20 minutes,Distilling chloroform,Add ethyl acetate,Frozen crystallization,Centrifugal,Drying to obtain acetylated compounds;

References:

Yueyang Huanyu Pharmaceutical Co., Ltd.;Xu Runxing CN108409824, 2018, A Location in patent:Paragraph 0020; 0028

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