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Efficient synthesis of novel thieno[3,2-b]-, [2,3-c]- and [3,2-c]pyridones by Sonogashira coupling of bromothiophenes with terminal alkynes and subsequent intramolecular C–N bond-forming reaction

Terminal AlkynesCross-coupling ReactionSonogashira CouplingOrganic ChemistryEfficient SynthesisChemistryHeterocycle ChemistryPharmacologySynthetic Chemistry