摘要:
5,6,7,8-Tetrahydrothieno[3,2-b]azepine,5,6,7,8-tetrahydro-1H-furo[3,- 2b]azepine, and 1,4,5,6,7,8-hexahydropyrrolo [3,2-b]azepine were synthesized by the ring expansion reaction of heterocyclic fused cyclohexanone oximes with diisobutylaluminum hydride (DIBAH). The mechanism of the reaction was different from that of Beckmann rearrangement.