STEROID DERIVATIVES OF PREGNA-4,9(11),17(20)-TRIEN-3-ONE, THEIR PREPARATION, THEIR APPLICATION TO THE PREPARATION OF STEROIDIC COMPOUNDS OF PREGNA-4,9(11),16-TRIEN-3,20 AND NOVEL INTERMEDIATES-DIONE,

摘要

The invention relates to compounds (I): IMG where Hal is chlorine or bromine, R is alkyl (1 - 6c), aralkyl (7 - 15 c) or a silylated residue, K is a group IMG (n = 2 or 3) and the wavy lines symbolize the possible existence of 2 isomers, their preparation, their application to the preparation of compounds (A): IMG where R1 is an acyl (1-8 e) and new intermediates .