Abstract

An efficient synthesis of 3-trifluoromethyl-1-(3,4-difluorophenyl)-1H-pyrazol-5(4H)-one (3) and their
Knoevenagel condensation reaction with 1,4-diphenyl -1H-pyrazole-3-carbaldehydes 4,
4-oxo-4H-chromene-3-carbaldehydes 6 and 2-chloroquinoline-3-carbaldehydes 8 have been described by using
conventional and non-conventional techniques. Comparison of conventional and non-conventional techniques
like Microwave , Ultrasonic assisted reactions showed that, the later procedure require shorter reaction time,
good yield and was applicable for larger set of substrates emphasizing the importance of eco-friendly conditions.

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