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. 20, 1993
Filed:
Oct. 23, 1992
Applicant:
Inventors:
Reto Luisoli, Holstein, CH;
Werner Stegmann, Liestal, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548260 ; 548257 ; 548259 ;
Abstract
Compounds of formula ##STR1## wherein R.sub.1 is hydrogen alkyl, alkoxy, phenyl, phenylaklyl or halogen, and R.sub.2 is alkyl phenyl, phenylaklyl or cycloalkyl, are prepared by reacting a compound of formula ##STR2## with a compound of formula ##STR3## wherein R.sub.3 and R.sub.4 are alkyl, and formaldehyde, in a one-pot process in the absence of a solvent.