The novel synthesis of a new skeletal compound, benzonaphthazepine, from N-bromobenzylnaphthylamine using a Pd reagent is described. In the biaryl coupling reaction of N-bromobenzylnaphthylamine using a Pd reagent, the intramolecular coordination of the benzylamino group to Pd causes regioselective C-H activation at the peri position relative to the amine group on the naphthalene ring, producing benzonaphthazepine in good to excellent yield. The bulkiness of the substituent at C7 on the naphthalene ring affects the regioselectivity of the biaryl coupling reaction.
本研究描述了利用
钯试剂从 N-
溴苄基
萘胺合成新骨架化合物苯并
萘氮杂卓的新方法。在使用
钯试剂对 N-
溴苄基
萘胺进行双芳基偶联反应时,苄基
氨基与
钯的分子内配位会导致相对于
萘环上胺基的周位上的 C-H 发生区域选择性活化,从而以良好甚至极佳的收率生成苯并
萘氮杂卓。
萘环 C7 处取代基的体积会影响双芳基偶联反应的区域选择性。