was developed for the regioselective formation of 2-aryl- or 2,5-diarylselenophenes via a palladium-catalyzed direct arylation. This protocol is suitable for a wide range of aryl halides containing different functional groups. The 2-arylated substrates can undergo an additional regioselective direct arylation event furnishing symmetrical or unsymmetrical 2,5-diaryl selenophenes in good yield. Competition
开发了一种有效且方便的方法,用于通过
钯催化的直接芳基化反应,选择性地形成2-芳基-或2,5-二芳基
硒代苯。该协议适用于各种包含不同官能团的芳基卤化物。2-芳基化的底物可经历另外的区域选择性直接芳基化事件,以高收率提供对称或不对称的2,5-二芳基
硒代苯。竞争实验和酸添加剂的作用与协同的
金属化去质子化(CMD)途径一致。