Abstract
AbstractThe 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.
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