Process for the preparation of 4-androstene-3,17-dione derivativ

Details Process for the preparation of 4-androstene-3,17-dione derivativ Process for the preparation of 4-androstene-3,17-dione derivativ

1976-12-16

1978-07-11

Tanenholtz, Alvin E.

Textiles: fiber preparation

C07B 2900

Patent

active

041000277

ABSTRACT:
A process for the preparation of 4-androstene-3,17-dione derivatives of the formula ##STR1## wherein X is 6,7-methylene or fluoro, chloro, or methyl in the 6- or 7-position, comprises fermenting a sterol of the formula ##STR2## wherein X is as above and R.sub.1 is a hydrocarbon residue of 8-10 carbon atoms with a microorganism culture capable of degrading the side chain of a sterol.

REFERENCES:
patent: 3388042 (1968-06-01), Arima et al
patent: 3684656 (1972-08-01), Waard
patent: 3759791 (1973-09-01), Marsheck et al

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