The sodium salts of the tricyclic tosylhydrazones 1, 4 and 5 yield by base-catalyzed fragmentation between 130–160° the monocyclic ring expansion products 2, 3 and 6. IR.-spectrometry suggests a diazoalkane A as the principal intermediate of the fragmentation. Besides the known carbene mechanism the reaction is considered to pass through a noncarbenoid intermediate.
三环甲苯磺酰腙的钠盐1,4和5收率由碱催化的碎片130-160°之间的单环膨胀的产品2,3和6 IR.-法提出了一种重氮烷甲作为主要中间体的碎裂。除了已知的卡宾机理外,该反应还被认为通过了非卡宾类中间体。