Unexpected formation of novel pyrrole derivatives by the reaction of thioamide with dimethyl acetylenedicarboxylate |
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| Authors: | Hirofumi Nakano Tomoaki IshibashiToshihiko Sawada |
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| Institution: | Department of Chemistry, Aichi University of Education, Igaya, Kariya, Aichi 448-8542, Japan |
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| Abstract: | The reaction of thioamides with DMAD gave the pyrrole derivatives in good yield and the thiophene derivatives as a byproduct. These were formed by 1,3-dipolar cycloaddition of themodynamicaly stable azomethine ylide or less stable thiocarbonyl ylide with DMAD, followed by elimination of thioaldehyde or imine derivatives. |
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