Synthesis of pyrazolo[4â²,3â²:3,4]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
Keywords: هتروسیکلهای نیتروژن; Nitrogen heterocycles; Pyrazoles; Alkynes; Tandem cyclisation; Fluorescence;