Gold-Catalyzed Domino Synthesis of Functionalized Benzofurans and Tetracyclic Isochromans via Formal Carboalkoxylation
作者:Tomoyuki Obata、Sho Suzuki、Asuka Nakagawa、Ryota Kajihara、Keiichi Noguchi、Akio Saito
DOI:10.1021/acs.orglett.6b02159
日期:2016.8.19
domino synthesis of benzofurans with the modification of side chains from α-alkoxyalkyl o-alkynylaryl ethers (n = 0) and electron-rich arenes has been developed. In the present domino reaction, which would proceed via the α-alkoxyalkylation of arenes with an intermediate in the migratory cycloisomerization of o-alkynylaryl ethers followed by the nucleophilic addition of benzofurans to benzyl ethers, a
已经开发了由α-烷氧基烷基邻炔基芳基醚(n = 0)和富电子芳烃对侧链进行修饰的苯并呋喃的多米诺合成。在目前的多米诺骨牌反应中,芳烃的α-烷氧基烷基化与邻炔基芳基醚的迁移环异构化中的中间体进行反应,然后将苯并呋喃亲核加成到苄基醚中,阳离子Au(III)催化剂活化了C- Cπ键和C–Oσ键。本方法可以扩展到由α-烷氧基烷基(邻炔基芳基)甲基醚(n= 1)和芳基甲氧基甲基醚的Au(I)催化的四环异色团的多米诺骨牌合成。