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. 09, 1993
Filed:
Oct. 02, 1990
Applicant:
Inventors:
Axel Bader, Bergisch Gladbach, DE;
Dieter Arlt, Cologne, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07D / ;
U.S. Cl.
CPC ...
549240 ; 549241 ; 549246 ; 558359 ; 560 64 ; 560 73 ; 562405 ; 562488 ; 564155 ; 568 34 ; 568316 ; 568636 ; 568646 ; 568660 ; 568729 ; 568932 ; 570128 ; 570143 ; 570184 ; 585534 ;
Abstract
Symmetrical diaryl-acetylenes can be prepared by reacting an aryl halide with acetylene in the presence of a palladium catalyst and a base. If the acetylene is introduced into the liquid reaction mixture using a high intensity gas dispersion means, the aryl halide used can be an aryl bromide.