Patent · US Expired

Process for the preparation of 4-androstene-3,17-dione and 1,4-androstadiene-3,17-dione

US5418145A · kind A · utility

3Cited by

3References

2Claims

0Family size

Assignee

SCHERING CORPORATION · US

Inventors

Alfred Weber · Wien, AT
Mario Kennecke · Berlin, DE
Johannes Kurzidim · Berlin, DE

Key dates

Filing date	Nov 10, 1993
Grant date	May 23, 1995
Priority date	—
Expiry date	Nov 10, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC12P33/005
WIPO fieldBiotechnology
WIPO sectorChemistry

Abstract

A process is claimed for the preparation of 4-androstene-3,17-dione and 1,4-androstadiene-3,17-dione of the general formula ##STR1## wherein symbolizes a single bond or a double bond, characterized by fermenting .alpha.-sitosterol with a culture of a strain of microorganisms capable of side chain degradation of sterols.

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