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:
May. 09, 1978
Filed:
Dec. 22, 1976
Applicant:
Inventor:
Valentin Rautenstrauch, Grand-Lancy, CH;
Assignee:
Firmenich S.A., Geneva, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C11C / ;
U.S. Cl.
CPC ...
2604 / ; 560122 ;
Abstract
Process for the preparation of .gamma.,.delta.-unsaturated carboxylate esters which comprises reacting an .alpha.,.beta.-unsaturated alcohol with a trialkyl orthopropionate in the presence of an organic acid having pk.sub.a of about 7 to 9. Among the thus obtained .gamma.,.delta.-unsaturated carboxylate esters, 2,5,9-trimethyl-deca-3,4,8-triene-carboxylates and 2-methyl-3-[2-methyl-5-isopropenyl-cyclopent-1-en-1-yl]-propionates are particularly useful as intermediates for the preparation of perfuming ingredients.