论文部分内容阅读
一、引言化学家早已熟悉芳香族亲核取代反应主要按这种机理进行取代的芳香化合物,要求在被取代基团的邻位或对位有很强的拉电子基团,特别要求有硝基存在,以产生活化作用。
I. INTRODUCTION Chemists have long been familiar with aromatic nucleophilic substitution reactions which are mainly substituted by this mechanism. They require strong electron-withdrawing groups in the ortho or para position of the substituted groups, especially nitro Exist to produce activation.