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:
Dec. 11, 1990
Filed:
Mar. 28, 1988
Applicant:
Inventor:
Fumio Toda, Ehime, JP;
Assignee:
Daicel Chemical Industries, Ltd., Sakai, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
20415769 ; 20415771 ; 20415782 ; 20415772 ; 20415787 ; 20415793 ;
Abstract
An optically active substance having an optical purity of at least 50% e.e. is obtained by an asymmetric photochemical reaction by converting a starting, achiral material in a chiral crystalline form and irradiating light to the chiral crystalline form to effect the photocyclization of the starting material.