The addition of Et2AlCN in the presence of ZnBr2 or Et2AlCl to 1,3-dicarbonyl compounds derived from (S)-4-isopropyl-2-oxazolidinone, proceeds with high diastereoselectivity (94-98% de) and good chemical yields. This type of addition to chiral P-dicarbonyl substrates represents a new synthetic methodology leading to the formation of enantiomerically pure cyanohydrins. (C) 2003 Elsevier Ltd. All rights reserved.
Stereoselective Synthesis of α-Alkyl-β-keto Imides via Asymmetric Redox C−C Bond Formation between α-Alkyl-α-diazocarbonyl Compounds and Aldehydes
Asymmetric redox C-C bond formation between alpha-alkyl-alpha-diazocarbonyl compounds and aldehydes was developed as a practical and general method for the construction of alpha-alkyl-beta-keto imides having a chiral nonracemic tertiary stereogenic center.
EVANS, D. A.;ENNIS, M. D.;LE, T.;MANDEL, N.;MANDEL, G., J. AMER. CHEM. SOC., 1984, 106, N 4, 1154-1156
作者:EVANS, D. A.、ENNIS, M. D.、LE, T.、MANDEL, N.、MANDEL, G.