Organotellurium Chemistry: Remarkably Facile Preparation of Benzo-1,3-tellurazoles
作者:Nathan C. McMullen、Frank R. Fronczek、Thomas Junk
DOI:10.1002/jhet.1007
日期:2013.1
two‐step sequence, starting with readily available 2‐haloanilines. This approach relies on the preparation of bis(2‐aminophenyl) ditellurides by nucleophilic halide displacement from 2‐haloanilines with sodium telluride in N‐methylpyrrolidone. Subsequent reductive cyclization with carboxylic acid halides or carboxylic anhydrides furnished benzo‐1,3‐tellurazoles in good yields.
从一个容易获得的2-卤代苯胺开始,按照容易的两步顺序制备在2位上带有烷基或芳基取代基的苯并-1,3-二氢呋喃唑。该方法依赖于在N-甲基吡咯烷酮中通过2-卤代苯胺与碲化钠的亲核卤化物置换来制备双(2-氨基苯基)二碲化物。随后用羧酸卤化物或羧酸酐进行的还原环化反应可提供高收率的苯并-1,3-二碲唑。