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. 31, 1990
Filed:
Feb. 24, 1989
Charles A McCombs, Kingsport, TN (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Acetoacetic esters of the formula R--OOCCH.sub.2 COCH.sub.3 are reacted with an unsaturated ester of the formula R.sup.1 R.sup.2 C.dbd.CHCOOR.sup.3 in the presence of basic catalyst such as ethanolic sodium ethoxide to give compound I of the formula ##STR1## and the alcohol by-product HOR.sup.3. By known hydrolysis and decarboxylation procedures, compound I is convertible to compound II of the formula ##STR2## In the above formulas, R is alkyl, R.sup.1 and R.sup.2 are each selected independently from H, alkyl, alkylthioalkyl, cycloalkyl, alkyl substituted cycloalkyl, aryl, substituted aryl, heterocyclic, or substituted heterocyclic, and R.sup.3 is alkyl or cycloalkyl. These compounds I and II are intermediates in the preparation of known herbicides.