Synthesis of Spiropyrrolidines and Spiropyrrolizidines by Azomethine Ylide Cycloaddition of Baylis-Hillman Adducts Derived from N-Methyl Maleimide

[摘要]：The stereoselective synthesis of a series of novel spiropyrrolidines and spiropyrrolizidines has been accomplished through an intermolecular 1,3-dipolar cycloaddition of an azomethine ylides with dipolarophiles derived from the Baylis-Hillman reaction of isatins with N-methyl maleimide.

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