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:
Oct. 05, 1993
Filed:
May. 07, 1992
Applicant:
Inventors:
Pierre F Chabardes, Sainte Foy Les Lyon, FR;
Lucette Duhamel, Mont Saint Aignan, FR;
Pierre Duhamel, Mont Saint Aignan, FR;
Jerome Guillemont, Beuzeville, FR;
Jean-Marie Poirier, Saint Martin de Vivier, FR;
Assignee:
Rhone-Poulenc Nutrition Animale, Commentry, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549423 ; 568447 ; 568463 ; 568496 ;
Abstract
The present invention relates to dihydropyran derivatives, processes for preparing, and processes of using the derivatives. The derivatives are prepared by condensation of lithium dienolate of prenal with an aldehyde or a ketone. The pyran derivative prepared from .beta.-ionylideneacetaldehyde when treated in the presence of a catalyst directly forms retinal.