【摘要】 本工作合成了一系列取代的硝酮类化合物。其中部分化合物仅一侧的苯环上带有取代基,而另部分化合物则两个苯环上均带有取代基。研究工作表明:取代基处于一侧的硝酮类化合物,不论取代基是给出电子或接受电子的,均有利于化合物光环化反应的进行。而当两个苯环分别带有给电子及接受电子的取代基形成推拉结构时,则大大减弱了化合物光环化反应的发生。文章对上述结果进行了初步讨论。更多还原

【Abstract】 In this work, a series of nitrone compounds have been synthesized. Some nitrones synthesized only have substituents on the phenyl rings connected with a -carbons, and the others are substituted on both phenyl rings. The obtained results indicate that for the former kind of nitrones, no matter what substituents are, either electron acceptor or electron donnor, the -photocyclization is accelerated. However, for the later kind, due to the formation of push-pull structure along the main frame of nitrone, the reaction rate decreases drastically. The results mentioned above are discussed preliminarily.更多还原