作者:K. A. Kochetkov、S. R. Harutyunyan、N. A. Kuz"mina、T. F. Savel"eva、V. I. Maleev、A. S. Peregudov、S. Vyskočil、A. S. Sagiyan
DOI:10.1023/a:1013090619703
日期:——
Alkali metal salts of substituted (S)-prolines, alkali metal alkoxides of (S)-prolinol, and Na salts of chiral substituted 2-amino-2'-hydroxy-1,1'-binaphthyls can catalyze the asymmetric Michael reaction of diethyl malonate with crotonaldehyde to give adducts in >90% yields with ee up to 40%. The influences of the catalyst structure, the nature of the alkali metal cation, temperature, the solvent, and salt additives on the reaction outcome were studied.