A New Synthetic Route of 2-Aroyl- and 2-Benzyl-Benzofurans and their Application in the Total Synthesis of a Metabolite Isolated from Dorstenia gigas
作者:Christian Correa、María del Carmen Cruz、Fabiola Jiménez、L. Gerardo Zepeda、Joaquín Tamariz
DOI:10.1071/ch08243
日期:——
regioselective and short synthesis of 2-aroylbenzofurans 2a–h. The Wolff–Kishner reduction of the latter yielded a series of substituted 2-benzylbenzofurans 3a–h. This methodology was applied in the first total synthesis of the metabolite 2-(4-hydroxybenzyl)-6-methoxybenzofuran 1, which was isolated from the tropical plant Dorstenia gigas, and obtained through a six-step route and in a 24% overall yield
(Z)-3-(二甲基氨基)-2-芳氧基-1-芳基丙基-2-en-1-ones 4a-h 的路易斯酸催化环化导致 2-芳酰基苯并呋喃 2a-h 的区域选择性和短合成. 后者的 Wolff-Kishner 还原产生一系列取代的 2-苄基苯并呋喃 3a-h。该方法应用于代谢物 2-(4-羟基苄基)-6-甲氧基苯并呋喃 1 的首次全合成,该代谢物从热带植物 Dorstenia gigas 中分离出来,通过六步路线获得,总产率为 24% .