Novel Synthesis of a New Skeletal Compound Benzonaphthazepine by Regioselective C-H Activation Utilizing the Intramolecular Coordination of an Amine to Pd
作者:Takashi Harayama、Tomonori Sato、Akihiro Hori、Hitoshi Abe、Yasuo Takeuchi
DOI:10.1055/s-2004-822371
日期:——
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。