摘要:
Nucleophilic addition of alkyl- and aryl-zinc reagents to a C(4) functionalized isoxazolyl aldehyde proceeded effectively with high enantioselectivity (85-94% ee). The amino alcohol catalyst (S)-2-piperidinyl-1,1,2-triphenyl ethanol (10) afforded the (R)-product 2b. as established by X-ray crystallography. (C) 2008 Elsevier Ltd. All rights reserved.