作者:Jizhi Ni、Heping Xiao、Lipeng Weng、Xiaofeng Wei、Youjun Xu
DOI:10.1016/j.tet.2011.05.060
日期:2011.7
(±)-α-noscapine, a phthalide tetrahydroisoquinoline alkaloid exhibiting several biological activities, is described. The strategy features a blocking group-directed Bischler–Napieralski reaction followed by diastereoselective reduction (α/β>23:1). One of the key intermediates, phthalide-3-carboxylic acid, could be efficiently prepared from simple benzoic acid derivative and glyoxylic acid in one-pot
描述了一种新的非对映选择性合成(±)-α-诺西可汀(一种表现出几种生物学活性的邻苯二甲酸四氢异喹啉碱生物碱)的新方法。该策略的特点是,在针对基团的Bischler-Napieralski反应中发生阻断,然后进行非对映选择性还原(α/β> 23:1)。关键的中间体之一,邻苯二甲酸酯-3-羧酸,可以由一锅简单的苯甲酸衍生物和乙醛酸有效地制备。