The Ketene-Surrogate Coupling: Catalytic Conversion of Aryl Iodides into Aryl Ketenes through Ynol Ethers
作者:Wenhan Zhang、Joseph M. Ready
DOI:10.1002/anie.201405036
日期:2014.8.18
tert‐Butoxyacetylene is shown to undergo Sonogashira coupling with aryl iodides to yield aryl‐substituted tert‐butyl ynol ethers. These intermediates participate in a [1,5]‐hydride shift, which results in the extrusion of isobutylene and the generation of aryl ketenes. The ketenes are trapped in situ with multiple nucleophiles or undergo electrocyclic ring closure to yield hydroxynaphthalenes and quinolines
表明叔丁氧基乙炔与芳基碘化物发生 Sonogashira 偶联,生成芳基取代的叔丁基炔醇醚。这些中间体参与[1,5]-氢化物转移,导致异丁烯的挤出和芳基烯酮的生成。烯酮被多个亲核试剂原位捕获或进行电环闭合以产生羟基萘和喹啉。