Patent · US Expired

Process for preparing 3.beta.,7.beta.-dihydroxy-.DELTA..sup.5 -steroids

US4416985A · kind A · utility

5Cited by

1References

5Claims

0Family size

Assignee

SCHERING CORPORATION · US

Inventors

Karl Petzoldt · Berlin, DE
Rudolf Wiechert · Berlin, DE
Henry Laurent
Klaus Nickisch · Berlin, DE
Dieter Bittler · Berlin, DE

Key dates

Filing date	Nov 3, 1981
Grant date	Nov 22, 1983
Priority date	—
Expiry date	Nov 3, 2001

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07J71/001
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for preparing a 3.beta.,7.beta.-dihydroxy-.DELTA..sup.5 steroid of the formula ##STR1## wherein Q is ##STR2## and R.sub.1 is hydrogen, trimethylacetyl, tert-butyldimethylsilyl, dimethyl-2-(3-methylbutyl)silyl or tribenzylsilyl, comprises fermenting a 3.beta.-hydroxy-.DELTA..sup.5 -steroid of the formula ##STR3## wherein Q is as defined above, and PA0 R.sub.2 is hydrogen or alkanoyl of 2-6 carbon atoms, with a culture of Botryodiplodia malorum to obtain the corresponding 3.beta.,7.beta.-dihydroxy-.DELTA..sup.5 -steroid; and, optionally, reacting the resultant product with trimethylacetic anhydride, tert-butyldimethylsilyl chloride, dimethyl-2-(3-methylbutyl)silyl chloride, or tribenzylsilyl chloride.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.