Preparation of 6.alpha., 9.alpha.-difluoro steroids

Details Preparation of 6.alpha., 9.alpha.-difluoro steroids Preparation of 6.alpha., 9.alpha.-difluoro steroids

1994-01-26

1995-12-26

Cook, Rebecca

Organic compounds -- part of the class 532-570 series

Organic compounds

Cyclopentanohydrophenanthrene ring system containing

C07J 300, A61K 3156

Patent

active

054789575

ABSTRACT:
A process for the preparation of 6.alpha.,9.alpha.-difluoro steroids of the formula ##STR1## wherein R is hydrogen or an ester remainder.

REFERENCES:
patent: 3014938 (1961-12-01), Mills et al.
patent: 3636010 (1972-01-01), Anner et al.
patent: 3947409 (1976-03-01), Hirschmann
patent: 4188322 (1980-02-01), Castelli et al.
patent: 4198336 (1980-04-01), Alvarez
Fatiadi, Synthesis, pp. 229-238, Apr. 1974.
CA:119:48725 Lal 1993.
Copy of French Search Report (2 pages) May 1993.

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