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:
May. 21, 2002
Filed:
Sep. 07, 2001
Applicant:
Inventor:
Hisashi Yamamoto, Aichi, JP;
Assignee:
Ono Pharmaceutical Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 5/100 ;
U.S. Cl.
CPC ...
C07C 5/100 ;
Abstract
Novel intermediates, i.e., N-(2S-(2-propenyl)octanoyl)-(1S)-(−)-2, 10-camphorsultam, N-(2S-(2-propynyl)octanoyl)-(1S)-(−)-2,10-camphorsultam and N-(2R-(2-propyl)octanoyl)-(1S)-(−)-2,10-camphorsultam; processes for the preparation of the intermediates; and processes for the preparation of optically active 2S-(2-propenyl)octanoic acid, 2S-(2-propynyl)octanoic acid and 2R-propyloctanoic acid by using the same. Optically active 2R-propyloctanoic acid equivalent or superior to that prepared by the process of the prior art in optical purity can be efficiently prepared in shorter reaction steps.