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. 02, 1991
Filed:
Oct. 16, 1989
Applicant:
Inventor:
Vratislav Kvita, Reinach, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549294 ;
Abstract
The invention relates to .alpha.-pyrones of formula I ##STR1## wherein R.sup.1 is chloro or bromo and R.sup.2 is hydrogen, chloro or bromo. The halogen in 4-position can be replaced, for example, by alkoxy, alkylthio or secondary amino. The .alpha.-pyrones are suitable diene components for Diels-Alder reactions.