Patent · US Expired

Process for synthesizing estrone or estrone derivatives

US4357278A · kind A · utility

5Cited by

1References

3Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Gerhard Quinkert · Königstein, DE
Wolf-Dietrich Weber · Pfungstadt, DE
Ulrich Schwartz · Frankfurt am Main, DE

Key dates

Filing date	Apr 10, 1981
Grant date	Nov 2, 1982
Priority date	—
Expiry date	Apr 10, 2001

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07F7/081
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

What are disclosed are a multi-step synthesis for the preparation of 9(11)-dehydroestrone 3-methyl ether from 2-methyl,4-methoxy benzaldehyde; 1-(4-methoxy-2-methyl-(phenyl)-3-(1-methyl-2-oxo-5-t-vinyl-cyclopent-r-yl) -propane-1-one, an intermediate in said synthesis; and a method for the preparation of 3-vinylcyclopentanone from 2-vinylcyclopropane-1,1-dicarboxylic acid.

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