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:
Feb. 26, 1980
Filed:
Aug. 16, 1978
Urs Burckhardt, Basel, CH;
Richard J Troxler, Birsfelden, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
A process for the production of desoxy-.alpha.-acids from the corresponding .beta.-acids is disclosed which process comprises converting a .beta.-acid into a mixture of its monoacylation products and subsequently reacting the monoacylation product at 160.degree. to 250.degree. C., in the presence of a lower alkanoic acid with an anhydride of such an alkanoic acid, with the splitting-off of isoprene, to obtain the triacyl derivative of the corresponding desoxy-.alpha.-acid, and hydrolysing said triacyl derivative to obtain the desoxy-.alpha.-acid. Desoxy-.alpha.-acids are valuable intermediates for producing bitter principles, which are used in the foodstuffs and drinks industry.