REGIOSPECIFIC SYNTHESIS OF UNSUBSTITUTED BASIC SKELETONS OF HETEROCYCLES CONTAINING NITROGEN NEIGHBORING AN AROMATIC RING BY THE REDUCTIVE RING EXPANSION REACTION USING DIISOBUTYLALUMINUM HYDRIDE

摘要

A systematic investigation of reductive ring expansion reaction of oximes with diisobutylaluminum hydride (DIBAH) was performed. The reaction regiospecifically provided a variety of unsubstituted bicyclic heterocycles 3a-3g or tricyclic heterocycles 3h, 3j-31 that contained nitrogen attached to an aromatic ring.