16-methyl-.DELTA.1,4-pregnadiene-3,20-dione

Details 16-methyl-.DELTA.1,4-pregnadiene-3,20-dione 16-methyl-.DELTA.1,4-pregnadiene-3,20-dione

1993-07-01

1995-05-02

Richter, Johann

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540113, 540114, 540115, 540116, 540120, 552569, 552574, 552581, 552587, 552588, 552589, 552593, 552595, C07J 500, C07J 3100, C07J 3300, C07J 4300

Patent

active

054120918

ABSTRACT:
A compound of the formula ##STR1## in which ##STR2## is either a 3-keto-.DELTA.4-system or a 3-keto -.DELTA.1,4-system or a 3-OR.sub.4 - .DELTA.5-system in which R.sub.4 is hydrogen or a protector group of hydroxy, R is methyl --CH.sub.2 OH or --CH.sub.2 OR', in which R' is a protector group of hydroxy, R.sub.1 and R'.sub.1 are individually selected from the group consisting of methyl, a branched alkyl not possessing hydrogen in the .beta. position of 5 to 8 carbon atoms, aryl of up to 10 carbon atoms, heteroaryl of up to 10 carbon atoms and at least one heteroatom chosen from nitrogen, sulfur and oxygen and benzyl, n and m, are individually numbers 0 or 1, R.sub.2 and R.sub.3 are hydrogen or R.sub.2 is fluorine and R.sub.3 is formyloxy or acetyloxy and the dotted lines in position 9(11) indicate the optional presence of a second bond which is useful for the preparation of compounds of formula A.

REFERENCES:
patent: 4647410 (1987-03-01), van Heusen et al.
patent: 5248773 (1993-09-01), Boivin et al.

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