期刊
TETRAHEDRON LETTERS
卷 55, 期 5, 页码 982-984出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2013.12.032
关键词
Copper catalysis; Cyclisation; Phthalides; Total synthesis
Total synthesis of (+/-)-herbaric acid and (+/-)-(4-methoxybenzyl)-5,7-dimethoxyphthalide, two natural phthalide products, was achieved in 8 steps and 5 steps, respectively, starting from commercially available 3,5-dimethoxyaniline. The key step of the sequence included a copper-catalysed tandem cross-coupling and oxacylisation reaction of terminal alkynes and 2-iodobenzok acid derivatives via 5-exo-dig cyclisation with high stereo-, regio- and chemoselectivities. This straightforward method allows the preparation of diverse phthalides, which belong to a group of pharmacologically important compounds. (C) 2013 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据