process for the aromatization of the core is composed stéroidiques.

摘要

19-Nor-steroids with an aromatic ring A and having the partial formula FORM:0939903/IV(a)/1 said steroids having one double bond at the 6(7), 8(9) or 9(11) position are prepared by heating the corresponding 3-keto-1,4-diene compound having the partial formula FORM:0939903/IV(a)/2 with zinc in pyridine, a picoline, a butidine, a collidine, quinoline, isoquinoline, aniline or dimethylaniline in the presence of water. The Specification refers to a large number of reactants that may be used in the above process and the corresponding products obtainable therefrom.