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:
Jun. 15, 1999
Filed:
Oct. 27, 1997
Applicant:
Inventors:
Paul Adriaan Van Der Schaaf, Fribourg, CH;
Roman Kolly, Zumholz, CH;
Andreas Hafner, Laupen, CH;
Andreas Muhlebach, Belfaux, CH;
Assignee:
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07F / ;
U.S. Cl.
CPC ...
556 22 ; 556 23 ; 556136 ; 502155 ;
Abstract
A process for the preparation of a metal carbene, in which a metal salt is first reacted in the presence of a base and a secondary or tertiary alcohol with a tertiary phosphine or phosphite or a ditertiary diphosphine or diphosphite and then reacted in the presence of an acid with an alkyne and, if desired, an alkene.