摘要:
A process is described for the preparation of Δ 15-16 -17-ketosteroids of the formula in which the substituents have the meaning stated in the description, which process comprises a) the reaction of a 17-ketosteroid of the formula with diphenyl disulfide in the presence of a strong base, b) the subsequent oxidation reaction of the intermediate 16-phenyl sulfide to the sulfoxide and c) the sulfoxide elimination reaction to yield the Δ 15-16 ―17-ketosteroid compound of the formula (6). Said process is preferably applied to the synthesis of gestodene.
摘要:
The present invention relates to a microbiological process for the transformation of 17β-substituted 4-azaandrostan-3-ones and the use of the biotransformation products as inhibitors of the enzyme 5α-reductase.
摘要:
The present invention relates to a microbiological process for the transformation of 17β-substituted 4-azaandrostan-3-ones and the use of the biotransformation products as inhibitors of the enzyme 5α-reductase.