PROCESSES AND INTERMEDIATES FOR THE PRODUCTION OF FULVESTRANT
申请人:Synthon B.V.
公开号:EP2350111A1
公开(公告)日:2011-08-03
FULVESTRANT INTERMEDIATE
申请人:Ettema Gerrit J. B.
公开号:US20100105934A1
公开(公告)日:2010-04-29
A compound of formula (1)
wherein R
1
represents hydrogen or an acetyl group and R
2
represents a methyl, acetyl, or benzyl group, is useful as an intermediate in making fulvestrant. The compound (1) can be isolated as a crystalline material and can be provided in a ratio of 7-alpha epimer to 7-beta epimer in the range of 95:5 to 100:0.