1,4-pregnadiene-3,20-dione 16,17-acetal 21-esters, process for their preparation and pharmaceutical compositions containing them.

摘要

The present invention relates to compounds of the formula: IMAGE in which X1 and X2 correspond to H or F without distinction; R1 represents the following radicals: IMAGE IMAGE and R2 represents the radicals IMAGE in the form of an R epimer, an S epimer, or a stereoisomeric mixture of the R and S epimers in terms of the orientation of the substituents on the carbon atom at position 22, novel intermediates and a method of their preparation by hydrolysis-ketalization, and use of such compounds as drugs and/or therapeutic agents.