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:
Jun. 15, 1976
Filed:
Jun. 12, 1968
George Hermann Buchi, Mattapan, MA (US);
Hans Wuest, Mattapan, MA (US);
Gunther Ohloff, Bernex, Geneva, CH;
Hugo Strickler, Onex, Geneva, CH;
Firmenich S.A., Geneva, CH;
Abstract
The present invention relates to a novel process for preparing unsaturated aldehydes comprising four double bonds of formula ##SPC1## Wherein one of the double bonds is represented by the dotted lines. Aldehyde Ia (called .alpha.-sinensal) corresponds to the above formula wherein the double bond represented by the dotted lines is in the main carbon chain. Aldehyde Ib (called .beta.-sinensal) corresponds to the above formula wherein the double bond represented by the dotted lines is in the side chain. The invention also relates to new intermediates used in the said new process and to methods for preparing them. The said intermediates have also valuable organoleptic properties and are useful as fragrances in the preparation of perfumes, perfumed products and artificial essential oils.