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:
Dec. 25, 2012
Filed:
Dec. 15, 2009
Daisuke Mayama, Tokyo, JP;
Daisuke Mayama, Tokyo, JP;
Nippon Chemical Industrial Co., Ltd., Tokyo, JP;
Abstract
An object of the present invention is to provide an optically active phosphine-borane compound and a method for producing the same which are useful for the production of an optically active phosphine ligand and allow easy production of any antipode. There is provided a phosphine-borane compound represented by the following general formula (P-1). There is also provided a method for producing the phosphine-borane compound, the method comprising subjecting a hydrogen-phosphine-borane compound represented by the following general formula (P-2) to a coupling reaction with an optically active isocyanate compound represented by the following general formula (3). In the following formulae, Rand Reach represent a hydrogen atom, a hydrocarbon group, or a substituted hydrocarbon group and may be selected so that asymmetry may be induced on the phosphorus atom by the presence of these groups, or may be selected so that asymmetry may not be induced; and Rrepresents an asymmetric hydrocarbon group or an asymmetric substituted hydrocarbon group.