Synthesis of Novel Chiral Benzophospholanes and Their Application in Asymmetric Hydrogenation
A new class of chiral ligands bearing one or two benzophospholanes was developed for the purpose of Ru-catalyzed asymmetric hydrogenation. Although results of the Ru catalysis remain insufficient so far, 1,2-bis(2-isopropyl-2,3- dihydro-1H-phosphindol-1-yl)benzene (iPr-BeePHOS: 2b) has been found to provide high enantioselectivity in the Rh-catalyzed asymmetric hydrogenation of an enamide.
Shimizu, Hideo,Saito, Takao,Kumobayashi, Hidenori
p. 185 - 189
(2007/10/03)
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