A microflow system consisting of micromixers and microtube reactors provides an effective method for the introduction of two electrophiles onto dibromobiaryls. Selective monolithiation of dibromobiaryls, such as 2,2′-dibromobiphenyl, 4,4′-dibromobiphenyl, 2,7-dibromo-9,9-dioctylfluorene, 2,2′-dibromo-1,1′-binaphthyl, and 2,2′-dibromobibenzyl with 1 equiv of n-butyllithium followed by the reaction with electrophiles was achieved using a microflow system by virtue of fast micromixing and precise temperature control. Sequential introduction of two different electrophiles was achieved using an integrated microflow system composed of four micromixers and four microtube reactors to obtain unsymmetrically substituted biaryl compounds.
一个微流系统由微混合器和微管反应器组成,为双溴联苯引入两个亲电试剂提供了有效的方法。通过选择性的双溴联苯单烷基化,如2,2′-双溴联苯、4,4′-双溴联苯、2,7-双溴-9,9-二辛基芴、2,2′-双溴-1,1′-联萘和2,2′-双溴联苯基苄,使用1当量的正丁基锂后与亲电试剂反应,利用微流系统实现了通过快速微混合和精确温度控制。使用由四个微混合器和四个微管反应器组成的集成微流系统,实现了两种不同亲电试剂的顺序引入,以获得非对称取代联苯化合物。