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.
US9296780B2
申请人:——
公开号:US9296780B2
公开(公告)日:2016-03-29
[EN] PROCESS FOR ALKYNYLATING 16-SUBSTITUTED-17-KETO STEROIDS<br/>[FR] PROCÉDÉ POUR ALCYNYLER DES 17-CÉTO-STÉROÏDES 16-SUBSTITUÉS
申请人:CRYSTAL PHARMA SAU
公开号:WO2013092668A1
公开(公告)日:2013-06-27
The invention relates to a process for ethynylating 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.