An Unprecedented Synthesis of Eight-Membered-Ring Cyclic Thioimidic Esters by a Three-Component Reaction

[摘要]：The three-component reaction of the isocyanides and dialkyl acetylenedicarboxylates or dibenzoylacetylene (DBA) in the presence of elemental sulfur is described. The reaction afforded the corresponding eight-membered cyclic thioimidic esters in good yields.

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