Highly Selective Three-Component Coupling of Ethyl Propiolate, Alkenes, and Diphenyl Diselenide under Visible-Light Irradiation
作者:Akiya Ogawa、Mikio Doi、Ikuko Ogawa、Toshikazu Hirao
DOI:10.1002/(sici)1521-3773(19990712)38:13/14<2027::aid-anie2027>3.0.co;2-m
日期:1999.7.12
Just the right strength of carbon-radical trapping by diphenyl diselenide facilitates its selective three-component coupling with an electron-poor alkyne and an electron-rich alkene [Eq. (1)]. In contrast, (PhS)2 is too weak and (PhTe)2 too strong a radical trap, and polymerization of the unsaturated compounds and addition of (PhTe)2 to the alkyne occur, respectively.
恰到好处的二苯二硒化物捕获碳自由基的强度有利于其与缺电子炔烃和富电子烯烃的选择性三组分偶联[方程。(1)]。相比之下,(PhS)2 太弱和 (PhTe)2 太强是自由基陷阱,分别发生不饱和化合物的聚合和 (PhTe)2 与炔烃的加成。