A facile, efficient, green, and environmentally benign method is described for the synthesis
of 2,3-dihydroquinazolin-4(1H)-ones by direct cyclocondensation of 2-aminobenzamide with aldehydes
or ketones in water using PEG-SO3H as an acidic catalyst under room temperature. This new method
totally avoids the use of organic acids, toxic or expensive solvents and affording the corresponding
product in good to excellent yields in this reaction.
Keywords: PEG-SO3H, 2, 3-dihydroquinazolinones, water, synthesis.
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