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. 30, 1999
Filed:
Dec. 09, 1998
Korea Institute of Science and Technology, Seoul, KR;
Abstract
The present invention relates to optically pure bis(o-diarylphosphinophenyl)-tetrahydro-bi(1,3-oxazole) compounds represented by the formula (I) and a preparation method thereof. Bis(o-diarylphosphinophenyl)-tetrahydro-bi(1,3-oxazole) compounds of the present invention include (4S,4'S)-2,2'-bis(o-diarylphosphinophenyl)-4,4',5,5'-tetrahydro-4,4'-bi(1, 3-oxazole) represented by the formula (Ia) and its enantiomer, (4R,4'R)-2,2'-bis(o-diarylphosphinophenyl)-4,4',5,5'-tetrahydro-4,4'-bi(1, 3-oxazole) represented by the formula. The compounds of the present invention can be utilized in asymmetric hydrosilylation, hydrogenation, cyclopropylation and alkylation reactions.
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