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:
Apr. 30, 1991
Filed:
Jul. 19, 1988
Applicant:
Inventors:
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564302 ; 546147 ; 548470 ; 558354 ; 560 43 ; 562457 ; 564303 ; 564304 ;
Abstract
Asymmetric hydrogenation of prochiral N-aliphatic ketimines to give optically active secondary amines at a temperature from -20.degree. to 80.degree. C., a hydrogen pressure of 10.sup.5 to 10.sup.7 Pa, with the addition of catalytic amounts of an iridium compound of the formula III or IIIa