摘要:
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.
摘要:
The invention relates to a process for the preparation of a compound of formula 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.
摘要:
The present invention concerns a process of isomerizing trans fused bicyclic derivatives into cis fused bicyclic derivatives and the preparation of vitamin D or analogs thereof comprising said isomerization step.