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Synthesis of pyrazolo[4′,3′:3,4]pyrido[1,2-a]benzimidazoles and related new ring systems by tandem cyclisation of vic-alkynylpyrazole-4-carbaldehydes with (het)aryl-1,2-diamines and investigation of their optical properties

EngineeringHeterocyclicOptical PropertiesOrganic ChemistryTandem CyclisationChemistryHeterocycle ChemistrySynthetic Chemistry