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。