Regio- and Stereoselective Synthesis of 1-Benzopyrano[2,3-b]pyrrolo[2,3-d]pyridines: A Microwave-Accelerated Intramolecular [3+2] Cycloaddition Reaction of Azomethine Ylide

[摘要]：Regio-and stereoselective syntheses of tetracyclic compounds having chromone, pyrrolidine, and piperidine rings have been accomplished by an intramolecular [3+2] cycloaddition reaction involving azomethine ylide. The reactions were carried out thermally as well as by irradiation with microwave. The latter process accelerates the reaction. The selectivities were investigated by density functional theory computation.

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