Practical three-component synthesis of crowded arenes with donor–acceptor substitution
作者:Robert Fichtler、Jörg-M. Neudörfl、Axel Jacobi von Wangelin
DOI:10.1039/c1ob05984j
日期:——
An operationally simple two-step synthesis of substituted anilides has been developed. The methodology utilizes carboxamides, aldehydes, and olefins (or alkynes) as cheap starting materials and relies upon the sequential combination of condensation, cycloaddition, and oxidation reactions. The intermediate cycloadducts display various functional groups (e.g. Br, OAc, NR2, COR, Cbz) for further chemical
已经开发了操作上简单的两步合成取代的苯胺。该方法利用羧酰胺,醛和烯烃(或炔烃)作为廉价的原料,并依赖于缩合,环加成和氧化反应的顺序结合。中间环加合物显示出各种官能团(例如Br,OAc,NR 2,COR,Cbz),以便在环外围或核心处进行进一步的化学处理。在用MnO 2氧化后,可以以良好的总收率制备高度拥挤的带有多达四个其他取代基(烷基,芳基,羧酸根,氰基,硝基,溴)的苯胺。