types of cascade reactions which give pyridinium betaines 6 and pyrrolo-indoles 8 as the major reaction products. The one-pot syntheses of pyrroloindoles 8 represent a new and easy access to the basic skeleton of mitomycins 10. The scope and limitations of the cascade reactions were investigated.
亚硝基
芳烃二烯亲核体1与共轭二烯2和3a / 3b发生区域特异性反应,从而导致不稳定的Diels - Alder环加合物4和5。它们经历两种类型的级联反应,它们给出
吡啶鎓
甜菜碱6和
吡咯并
吲哚8作为主要反应产物。一锅合成
吡咯并
吲哚8代表了一种新的且容易获得的丝
裂霉素10基本骨架。研究了级联反应的范围和局限性。