Cross-Cycloaddition of Two Different Isocyanides: Chemoselective Heterodimerization and [3+2]-Cyclization of 1,4-Diazabutatriene
作者:Zhongyan Hu、Haiyan Yuan、Yang Men、Qun Liu、Jingping Zhang、Xianxiu Xu
DOI:10.1002/anie.201600257
日期:2016.6.13
A new cross‐cycloaddition reaction between a wide range of isocyanides and 2‐isocyanochalcones (or analogues) was developed for the expeditious synthesis of pyrrolo[3,4‐b]indoles under thermal conditions. On the basis of the experimental results and DFT calculations, a mechanism for this domino reaction is proposed involving chemoselective heterodimerization of two different isocyanides to form 1,4‐diazabutatriene
为了在热条件下快速合成吡咯并[3,4-b]吲哚,开发了一种新的跨环加成反应,该反应是在多种异氰酸酯和2-异氰基吲哚(或类似物)之间进行的。根据实验结果和DFT计算,提出了该多米诺反应的机制,其中涉及两种不同异氰酸酯的化学选择性异二聚形成1,4-二氮杂丁三烯中间体,然后进行分子内[3 + 2]-环加成和1,3质子位移