New routes for the synthesis of fused pyrrole scaffolds through transition metal-free tandem reactions
作者:Bingchuan Yang、Zixiao Huang、Hegen Guan、Xiaoyi Niu、Yanqiu Li、Shuai Fang、Chen Ma
DOI:10.1016/j.tetlet.2013.08.060
日期:2013.11
A series of transition metal-free tandem reactions for the synthesis of indolizines and 6,7-dihydroindolizin-8(5H)-ones by 4-bromobut-2-enoate ramifications reacted with 2-acetyl pyrrole derivatives are described. As the α-carbon changed from CH3, CH2Cl, CHCl2, to CCl3, different kinds of tandem reactions were observed. These tandem reactions could be used to synthesize fused indolizine and indolizidine
描述了通过4-溴丁-2-烯酸酯分枝反应与2-乙酰基吡咯衍生物反应合成吲哚嗪和6,7-二氢吲哚嗪-8(5 H)-ones的一系列无过渡金属的串联反应。当α-碳从CH 3,CH 2 Cl,CHCl 2变为CCl 3时,观察到了多种串联反应。这些串联反应可用于在温和和绿色条件下合成稠合的吲哚利嗪和吲哚利嗪骨架。