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:
Aug. 27, 1991
Filed:
Dec. 28, 1989
Applicant:
Inventors:
Sylvain Juge, Orsay, FR;
Jean-Pierre Genet, Fontenay-aus-Roses, FR;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
558 72 ; 558 81 ; 558 84 ; 558 85 ;
Abstract
New organic phosphorus compounds, comprised of hetero-phosphacycloalkanes whose phosphorus atom forms a complex with a borane. They can be prepared by the action of a borane on a hetero-phosphacycloalkane, within a solvent, at temperatures ranging from -20.degree. to +60.degree. C. Their transformation into other derivatives, phosphinites or phosphines in particular, can be carried out without any modification in the chirality of the initial complex. An especially useful application is their conversion into highly optically active phosphines, used in particular as catalysts in various reactions.