A process and novel starting materials for the production of 17.alpha.-ethynyl-17.beta.-hydroxy-18-methyl-4,15-estradien-3-one of Formula I ##STR1## are disclosed. Novel 17-ketone starting materials have the Formula II ##STR2## wherein R is an alkyl residue of 1-3 carbon atoms and ##STR3## is the grouping ##STR4## wherein R' is an acyl group of up to 10 carbon atoms.
Process for introducing a double bond into position 15, 16 of a steroid
申请人:Moutou Jean-Luc
公开号:US09012667B2
公开(公告)日:2015-04-21
The invention relates to a process for the preparation of a compound of formula (I):
wherein R1 and R2 are as defined in the description, by reaction of a compound of formula (II)
with a base.
Compound (I) is an intermediate useful in the preparation of gestodene.