PROCESS FOR PREPARING 4,17(20)-PROSTADIEN-3,16-DIONE FROM 16 ALPHA, 17 ALPHA-EPOXYPREGNENOLONE AND INTERMEDIATE COMPOUNDS FOR PREPARING THE SAME FOR A SHORT REACTION TIME WITH HIGH EFFICIENCY

摘要

PURPOSE: A process for preparing 4,17(20)-prostadien-3,16-dione from 16 alpha, 17 alpha-epoxypregnenolone are provided to effectively lower the values for low density lipoprotein and cholesterol and to increase the value for high density lipoprotein. CONSTITUTION: The process for preparing 4,17(20)-prostadien-3,16-dione(E-guggulsterone) represented by formula III from 16 alpha, 17 alpha-epoxypregnenolone comprises the steps of: reacting 16 alpha, 17 alpha-epoxypregnenolone represented by formula I with a hydrazine to obtain a compound represented by formula II, wherein 1 to 40 equivalent of the hydrazine is used to the 16 alpha, 17 alpha-epoxypregnenolone; and then oxidizing it using aluminum alkoxides.