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:
Jul. 15, 1997
Filed:
Jun. 02, 1995
Applicant:
Inventors:
Ernst Beriger, Allschwil, CH;
Haukur Kristinsson, Bottmingen, CH;
Assignee:
Ciba-Geigy Corporation, Tarrytown, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544182 ;
Abstract
A process for the preparation of a compound of the formula ##STR1## where Z and R are defined herein. A compound of formula II ##STR2## where R.sub.1 defined herein, is reacted with hydrazine hydrate and then subjected to hydrolysis to form the compound of formula I ##STR3## and the compound of the formula I is reacted with the aldehyde of the formula ##STR4## into the resulting compound of the formula IV.