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:
Jan. 05, 1999
Filed:
Mar. 07, 1997
Applicant:
Inventors:
Makoto Emura, Kanagawa, JP;
Takaaki Toyoda, Kanagawa, JP;
Nobuo Seido, Kanagawa, JP;
Ryoji Noyori, Aichi, JP;
Takao Ikariya, Aichi, JP;
Takeshi Ohkuma, Aichi, JP;
Assignee:
Takasago International Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568835 ; 568832 ; 568834 ;
Abstract
A process whereby 4-t-butylcyclohexanol with a high content of the cis-isomer, which is useful as a perfume ingredient, can be economically produced on an industrially available scale at a low cost. The process comprises hydrogenating 4-t-butylcyclohexanone by using a specific ruthenium-phosphine complex as a catalyst in the presence of a base containing an alkali metal and an alkylenediamine having from 1 to 6 carbon atoms.