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. 17, 1997
Filed:
Jul. 17, 1996
Applicant:
Inventors:
Koji Iwamoto, Ehime, JP;
Shin Tanaka, Ehime, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549290 ;
Abstract
The present invention involves the production of octahydrocoumarins from coumarins and/or 3,4-dihydrocoumarins in good yields by a simple process which can be industrially carried out, by reducing coumarins and/or 3,4-dihydrocoumarins to octohydrocoumarins with hydrogen in the presence of an alcohol and a ruthenium catalyst, and optionally heating resultant 3-(2-hydroxycyclohexyl) propionate contained in the reduction reaction mixture to conduct cyclization/dealcoholization and convert same to octohydrocoumarins.