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:
Nov. 24, 1992
Filed:
Jun. 17, 1991
Stephen G Davies, Oxford, GB;
The British Petroleum Company, p.l.c., London, GB;
Abstract
##STR1## Compounds having general formula (I) wherein (i) Cp is either a cyclopentadienyl ligand having the formula C.sub.5 (R.sup.3).sub.5 where the R.sup.3 groups are independently hydrogen, methyl or ethyl or an indenyl ligand; (ii) Z is a ligand having the formula X(R.sup.4).sub.2 (Y) wherein X is selected from phosphorus, arsenic or antimony; the R.sup.4 groups are independently aryl or aroxy and Y is selected from --R.sup.5 --NHR.sup.5 and --OR.sup.5 wherein R.sup.5 is a hydrocarbyl group; (iii) the R groups are independently hydrogen, halogen or C.sub.1 to C.sub.4 alkyl; (iv) R.sup.1 is selected from hydrogen, C.sub.1 to C.sub.6 alkyl, benzyl and --CO.sub.2 R.sup.6 where R.sup.6 is C.sub.1 to C.sub.6 alkyl; (v) R.sup.2 is selected from hydrogen, C.sub.1 to C.sub.10 alkyl, phenyl and benzyl, and (vi) B is either R or COY wherein Y is selected from --NHR.sup.7, --OR.sup.7 and --SR.sup.7 where R.sup.7 is a hydrocarbyl group is provided. The compounds are efficient asymmetric hydrogenating agents for prochiral carbonyl containing compounds when used in single enantiomer form.