| abstract |
The invention relates to a process for the preparation of 5 ~ Androsten derivatives of the general formula III, wherein R4 is a 2 lkanoyioxyrest and and R ^ together an oxo group or R5 is an alkanoyloxy group and Rg is a hydrogen atom or a lower saturated or unsaturated hydrocarbon radical by reaction of 5-androstene-1 -7-one derivatives with an acid chloride or anhydride. an alkanecarboxylic acid, in the presence of Lewis acids. The compounds of general formula III are pharmacologically active steroids or may be valuable civil products for the preparation of pharmacologically active steroids. - Formula III |