Reaction of 2-Thioquinazolinone (1) with various alkylating agents like dimethyl sulphate (DMS), diethyl sulphate (DES) and benzyl chloride (PhCH2Cl) in the presence of K2CO3 as a mild base, by a simple physical grinding, microwave irradiation, and PEG-600  under solvent-free conditions for 10-15 min at RT, followed by processing,...