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An efficient route to the new classes of derivatives tetrahydrochromeno[2,3-b]carbazoles and tetrahydrochromeno[3,2-f]indazoles has been developed. The cycloaddition reactions of chromones 3 and 4(More)
The synthesis of a number of benzimidazole Schiff bases 3 and 3-oxo-pyrimido[1,2-a]benzimidazoles 4 in excellent yields by a one-step sequence from the reaction of 2-aminobenzimidazole under green(More)