Pregna-1,4-diene3,20-dione-16-17-acetal-21 esters, process for t

Details Pregna-1,4-diene3,20-dione-16-17-acetal-21 esters, process for t Pregna-1,4-diene3,20-dione-16-17-acetal-21 esters, process for t

1994-07-20

1996-01-09

Shah, Mukund J.

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Cyclopentanohydrophenanthrene ring system doai

540 63, 540 70, 552565, 552566, A61K 3158, C07J 7100

Patent

active

054829348

ABSTRACT:
The present invention relates to compounds of the formula: ##STR1## in which X.sub.1 and X.sub.2 correspond to H or F without distinction; R.sub.1 represents the following radicals: ##STR2## and R.sub.2 represents the radicals ##STR3## 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.

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