obtained by the reaction of 1-phenylthio-2,3-epoxypropane (1) with sodium hydride in tetrahydrofuran (THF) and successive treatment with methyl iodide, was lithiated with lithium diisopropylamide at −78°C. The lithio derivative reacted with alkylhalides regioselectively at the α-position of sulfur atom, and hydrolysis of the products at room temperature in the presence of mercuric chloride afforded the
γ-Amino Alcohols via Organocascade Reactions Involving Dienamine Catalysis
作者:Chandrakumar Appayee、Americo J. Fraboni、Stacey E. Brenner-Moyer
DOI:10.1021/jo3017007
日期:2012.10.5
Enantioenriched β-functionalized-γ-amino alcohols were produced from simple achiral enals in one flask by combining dienamine- and iminium-catalyzed intermolecular reactions. Reaction products are precursors of γ-amino acids, γ-lactams, and pyrrolidines; one was employed in a synthesis of γ-amino acid (S)-vigabatrin, the bioactive enantiomer of Sabril.