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:
Aug. 31, 1976
Filed:
May. 06, 1974
Yataro Ichikawa, Iwakuni, JA;
Mamoru Yamamoto, Iwakuni, JA;
Teijin Limited, Osaka, JA;
Abstract
An unsaturated carbonyl compound, for example, one expressed by the following formula ##EQU1## is prepared by maintaining at an elevated temperature an allyl acetal of an .alpha.,.beta.-unsaturated aldehyde, for example, one expressed by the following formula ##EQU2## or a novel dienyl ether derived from it, for example, one expressed by the following formula ##EQU3## The allyl acetal can be derived, for example, from .beta.-methylcrotonaldehyde having 5 carbon atoms and prenyl alcohol having 5 carbon atoms. It is possible therefore to introduce an allyl residue containing at least 3 carbon atoms into the carbon atoms at the .gamma.-position to the carbonyl group of an .alpha., .beta.-unsaturated aldehyde containing at least 5 carbon atoms by a reaction consisting of the reduced number of steps. Moreover, the unsaturated aldehyde having the increased number of carbon atoms can be formed at a high yield by a relatively simple reaction.