Thermolysis of 4,4-dimethyl-1-(1-phenylvinyl)-5-(1-pyrrolidinyl)-4,5-dihydro-1H-1,2,3-triazole gave 2-methyl-N-(1-phenylvinyl)-1-(l-pyrrolidinyl)-1-propanimine, which reacted as a 2-azabutadiene with electrondeficient dienophiles to afford the corresponding [4+2] cycloadducts. Reactivity and regioselectivity of the cycloaddition reactions were rationalized with the frontier molecular orbital treatment.
4,4-二甲基-1-(1-
苯乙烯)-5-(1-
吡咯烷基)-4,5-二氢-
1H-1,2,3-三唑的热分解生成了2-甲基-N-(1-
苯乙烯)-1-(1-
吡咯烷基)-
1-丙胺,该化合物作为2-氮杂
丁二烯与电子缺乏的二烯亲核试剂反应,得到了相应的[4+2]环加成产物。通过前沿分子轨道理论对环加成反应的反应性和区域选择性进行了合理化解释。