Synthesis and Biological Evaluation of Sugars Containing α,β-Unsaturated γ-Lactones
作者:Nuno M. Xavier、Sandrina Silva、Paulo J. A. Madeira、M. Helena Florêncio、Filipa V. M. Silva、Jorge Justino、Joachim Thiem、Amélia P. Rauter
DOI:10.1002/ejoc.200800763
日期:2008.12
The stereocontrolled synthesis of new sugar derivatives carrying the α,β-unsaturated δ-lactone (butenolide) moiety is described. Sugar-fused or sugar-linked butenolides can be constructed by an efficient reaction sequence involving Wittig olefination of 3- or 5-keto sugars and intramolecular cyclization of the intermediate γ-hydroxy α,β-unsaturated esters. The antimicrobial activities of the products
描述了带有 α,β-不饱和 δ-内酯(丁烯内酯)部分的新糖衍生物的立体控制合成。糖稠合或糖连接的丁烯内酯可以通过有效的反应序列构建,包括 3-或 5-酮糖的 Wittig 烯化和中间体 γ-羟基 α,β-不饱和酯的分子内环化。研究了产品和已知糖衍生的吡喃类α,β-不饱和δ-内酯对六种病原菌和六种真菌的抗菌活性。吡喃 α,β-不饱和 δ-内酯 29 被证明是该系列中对植物病原真菌 Colletotrichum coffeanum(咖啡浆果病)和 Pyricularia oryzae(稻瘟病)最活跃的化合物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)