Synthesis of novel imidazo[1,2-a]pyridines and evaluation of their antifungal activities

New 2-(imidazo[1,2-a]pyridin-2-ylcarbonyl)-N -substituted hydrazinecarbothioamides (4a–j), N ’-(3-substituted-4-oxo-1,3-thiazolidin-2-ylidene)imidazo[1,2- a]pyridine-2-carbohydrazides (5a–f), and N -(nonsubstituted/4-substituted phenyl)-5-(imidazo[1,2-a]pyridine-2-yl)-1,3,4-oxadiazole-2-amines (6a–d) were synthesized from imidazo[1,2-a]pyridine-2-carbohydrazide (3) and evaluated for antifungal activity against Microsporum gypseum NCPF 580, M. canis, Trichophyton tonsurans NCPF 245, T. rubrum, Candida albicans ATCC 10231, and C. parapsilosis ATCC 22019 using amphotericin B as the standard.