Process and new intermediates for the preparation of 11-methylene steroids
申请人:Crystal Pharma SA
公开号:US11034716B2
公开(公告)日:2021-06-15
A process for the preparation of 11-methylene steroids from di-keto steroids involves selective olefination of the ketone at position 11 of the di-keto steroids. The resulting 11-methylene steroid products can be used as intermediates in the preparation of the synthetic steroids, Etonogestrel and Desogestrel, as well as other pharmaceutically active agents.