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New pyrazoline derivatives 7a–f, 11a–f, and 15a–f were synthesized via 1,3-cycloaddition of nitrileimines with α,β-unsaturated ketones using ecofriendly catalysts e.g., iodine or THAC in water. A comparative study between the utility of triethylamine and Na2CO3/THAC as catalyst was achieved. Anticancer activity against colon cancer HT29 was screened for sixteen pyrazoline derivatives. 7a and 11f derivatives...