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:
Feb. 05, 1991
Filed:
Apr. 24, 1989
Applicant:
Inventors:
Thomas Himmler, Cologne, DE;
Rudolf Braden, Odenthal-Scheuren, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07D / ;
U.S. Cl.
CPC ...
558414 ; 548453 ; 548517 ; 548518 ; 548526 ; 548527 ; 548531 ; 548532 ; 549 50 ; 549 60 ; 549364 ; 549414 ; 549435 ; 549436 ; 549466 ; 549468 ; 549473 ; 560102 ; 568425 ;
Abstract
Unsymmetric biaryl compounds are prepared by coupling two different halogenoaromatics by reaction with a metal and carrying out the reaction in the presence of catalytic amounts of a nickel compound, a promoter and a phosphorus-containing ligand.