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. 01, 2000
Filed:
Aug. 26, 1997
Applicant:
Inventors:
Assignee:
North Dakota State University, Fargo, ND (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528 86 ; 528 97 ; 528125 ; 528127 ; 528138 ; 528225 ; 528230 ; 528234 ; 528480 ; 528495 ; 528503 ;
Abstract
A chiral biphenyl compound includes a hindered 2,2'-substituted-1,1'-biphenyl subunit and has the following formula: ##STR1## The chiral biphenyl compounds have been shown to be useful as catalysts in asymmetric reactions. For example, an organozinc species can be formed by reacting the chiral biphenyl compound with an organozinc compound, R.sup.14 R.sup.15 Zn and then used as a catalyst for the asymmetric alkylation of an aldehyde by an organozinc compound.