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. 02, 2001
Filed:
Jun. 10, 1999
Applicant:
Inventors:
Assignee:
Takasago International Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07F 9/02 ;
U.S. Cl.
CPC ...
C07D / ; C07F 9/02 ;
Abstract
A method for manufacturing (3S,4R)-4-[(R)-1′-formylethyl]azetidin-2-one derivatives represented by formula (3) wherein R,represents a hydrogen atom or a protective group, through asymmetric hydroformylation of 4-vinylazetidin-2-one represented by formula (1) wherein R,has the same meaning as described above; in the presence of a rhodium complex and a (2S,4S)-diphosphine compound represented by formula (2) wherein R,represents a phenyl group which may be substituted with 1-5 substituent(s) selected from a lower alkyl group, a lower alkoxy group, and a halogen atom.