PROCESS FOR ALKYNYLATING 16-SUBSTITUTED-17-KETO STEROIDS
申请人:CRYSTAL PHARMA, S.A.U.
公开号:US20150005518A1
公开(公告)日:2015-01-01
A process ethynylates 16-methylene-17-keto steroids to the corresponding 16-methylene-17α-ethynyl-17β-hydroxy steroids by treatment with silyl-protected lithium acetylides followed by further desilylation. The resulting products are useful intermediates in the preparation of several pharmaceutically active agents, such as e.g. Nestorone® or melengestrol acetate.