Abstract
AbstractA novel D2‐symmetrical chiral tetraoxazoline ligand was synthesized from 1,2,4,5‐benzenetetracarboxylic acid and L‐valinol via a one‐pot reaction, and the asymmetric hydrosilylation of aromatic ketones was carried out in dichloromethane in the presence of 1.0 mol% of a bivalent copper ion catalyst with the tetraoxazoline to give optically active secondary alcohols. The chiral catalyst showed excellent activities and enantioselectivities in the hydrosilylation of aryl ketones with up to 99% ee.
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