Isocyanates react with alkenes, e.g. ethylene and propene, in a CC bond forming reaction on ligand-nickel(O) systems to yield azanickelacyclopentanones. These metallacycles have been characterized spectroscopically, and their reaction behaviour is discussed. The regioisomeric distribution of the CC coupling reaction is reported for the reaction with propene. The azanickelacyclopentanones obtained
异氰酸酯在
配体-
镍(O)系统上形成CC键的反应中与烯烃(例如
乙烯和
丙烯)反应,生成氮杂尼克
环戊酮。这些
金属环已在光谱上进行了表征,并讨论了它们的反应行为。报道了与
丙烯反应的CC偶联反应的区域异构分布。由
异氰酸酯和烯烃得到的氮杂尼克
环戊烷酮进一步与
乙烯反应产生环扩环,随后β-消除为不饱和酰胺。