A process for the preparation of 4,6-dien-3-one steroids
申请人:MITSUBISHI KASEI CORPORATION
公开号:EP0027192A1
公开(公告)日:1981-04-22
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.