A new convenient synthetic route towards 2-(hetero)aryl-substituted thieno[3,2-<i>b</i>]indoles using Fischer indolization
作者:Roman A. Irgashev、Alexander S. Steparuk、Gennady L. Rusinov
DOI:10.1039/c8ob01110a
日期:——
obtained thieno[3,2-b]indoles has been achieved due to a wide range of available starting materials, including both 2-bromo-3-(hetero)arylacrylates and arylhydrazines. In addition, two π-extended molecules, namely 1,4-bis(4H-thieno[3,2-b]indol-2-yl)benzene and 2,5-bis(4H-thieno[3,2-b]indol-2-yl)thiophene, have been synthesized in line with the current approach towards 2-(hetero)arylated thieno[3,2-b]indoles
使用有效的无过渡金属策略已成功制备了许多2-(杂)芳基取代的噻吩并[3,2- b ]吲哚,涉及费斯曼合成的5-(杂)芳基-3-羟基噻吩甲基2-溴-3-(杂)芳基丙烯酸酯和巯基乙酸甲酯的-2-羧酸酯,并将合成的3-羟基酯转化为相应的噻吩-3(2 H)-one,然后用芳基肼处理直接形成通过菲舍尔(Fischer)树脂化获得目标结构。同时,获得的噻吩并[3,2- b由于多种可用的起始材料,包括2-溴-3-(杂)芳基丙烯酸酯和芳基肼,已经获得了吲哚。另外,两个π-延伸的分子,即1,4-双(4 H-噻吩并[3,2 - b ]吲哚-2-基)苯和2,5-双(4 H-噻吩并[3,2- b ]吲哚-2-基)噻吩已按照目前对2-(杂)芳基噻吩并[3,2- b ]吲哚的方法合成。