A Convenient Synthesis of Functionalized Tricyclic Frameworks Containing an Azocine Moiety

[摘要]：Tetrahydro-3a,8b-dihydroxy-oxoindeno[1,2-b]pyrroles, prepared from ninhydrin and enamines, are subjected to intramolecular Wittig reactions to afford dihydro-1H-furo[2',3': 2,3] cyclopenta[ 1,2-b] pyrroles. These fused 5,5-ring systems undergo Et3N-mediated fragmentation to afford tetrahydrobenzo[c] furo[3,2-e]azocines in good yields.

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