A PROCESS FOR THE PREPARATION OF 4,6-DIEN-3-ONE STEROIDS

摘要

Disclosed is a process for the preparation of a 4,6-dien-3-one steroid by brominating an enolic ether of a 4-en-3-one steroid in a water-containing organic solvent which is substantially free from acetic acid and sodium acetate to give a 6-bromosteroid and then dehydrobrominating the 6-bromosteroid in a medium which contains dimethylformamide or N-methylpyrrolidone and 1 to 9% by volume of water.