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Synthesis of new chiral diphosphine ligand (BisbenzodioxanPhos) and its application in asymmetric catalytic hydrogenation

✍ Scribed by Cheng-Chao Pai; Yue-Ming Li; Zhong-Yuan Zhou; Albert S.C Chan

Publisher: Elsevier Science
Year: 2002
Tongue: French
Weight: 113 KB
Volume: 43
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(02)00383-0

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✦ Synopsis

The new chiral diphosphine ligand [(5,6), (5%,6%)-bis(1,2-ethylenedioxy)biphenyl-2,2%-diyl]bis(diphenylphosphine) (Bisben-zodioxanPhos) has been successfully prepared and used in ruthenium-catalyzed asymmetric hydrogenation of 2-(6%-methoxy-2%naphthyl)propenoic acid and b-keto esters with high enantioselectivity (92.2% and up to 99.5% ee, respectively).

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