The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 14, 1998
Filed:
Nov. 06, 1996
Applicant:
Inventor:
Petrus Hendricus Raijmakers, Uden, NL;
Assignee:
Akzo Nobel, N. V., Arnhem, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07J / ;
U.S. Cl.
CPC ...
552625 ; 552630 ;
Abstract
The invention relates to a method of isomerisation of equilin or a derivative thereof to delta(8,9)-dehydro estrone �delta(8,9)DHE!, characterized in that equilin or a derivative thereof is treated with a lithium salt of ethylenediamine or with lithium amide in dimethylsulfoxide.