Synthesis of Polyfunctionalized Thiophenes and Pyrido [3,2-c]Coumarines from 3-Carbamoyl/3-Thiocarbamoyl Chromones

摘要

New transformations of N-substituted 3-carbamoylchromones and virtually uninvestigated 3-thiocarbamoylchromones are described. The domino reactions result in the formation of pyridocoumarins and polyfunctional thiophene derivatives, respectively.