Regioselective α-addition of organocopper reagents to γ-(benzothiazole-2-thio)-α,β-enoates governed by anchimeric co-ordination. Synthesis of α-alkylated-β,γ-enoates
作者:Vincenzo Calò、Luigi Lopez、Giannangelo Pesce
DOI:10.1039/c39860001252
日期:——
The introduction of a leaving group, with co-ordination properties towards organocopperreagents, in the γ-position of α,β-enoates, changes the regioselectivity of the nucleophilic addition process leading to α-addition products.
An efficient total synthesis of a potent antifungal and moderate cytotoxic agent crocacin C is described. The synthesis involves the generation of four contiguous stereogenic centres via desymmetrization of a meso bicyclic dihydrofuran using asymmetric hydroboration. (c) 2006 Published by Elsevier Ltd.
CALO V.; LOPEZ L.; PESCE G., J. CHEM. SOC. CHEM. COMMUN.,(1986) N 16, 1252-1253