| abstract |
The present invention discloses a process for the preparation of pregnadiene derivatives having formula I, their stereoisomer and intermediate thereof. Formula I wherein each substituent is independently, R 1 and R 2 is hydrogen or C 1 -C 8 straight, branched alkyl chain, saturated or unsaturated cycloalkyl; R 3 is hydrogen or wherein R 5 represents C 1 -C 8 straight, branched alkyl chain or cycloalkyl; R 4 is hydrogen or halogen; R 6 is hydrogen or halogen; |