A convenient route to pentacyclic benzodiazepines and quinoxalines is reported, which simultaneously represent cyclic guanidines. Five new heterocyclic ring systems are described and the rules governing the regioselectivity of some of the ring closure reactions are studied. The structure of one of the products is confirmed by X-ray analysis. Scope and versatility of the process are indicated by several examples.
报道了一种方便的合成五环苯并二氮䓬和喹噁啉的方法,这两种化合物同时也代表环状
胍。本文描述了五种新的杂环体系,并研究了某些环化反应的区域选择性规则。通过X射线分析确认了其中一个产物的结构。通过多个实例展示了该方法的应用范围和多功能性。