A green approach for the synthesis of 1-methyl-2-(alkylthio)-1H-benzimidazoles 6 (R 1 = CH3, C2H5, CH2Ph) under, different conditions has been developed from N-methyl-2-mercaptobenzimidazole (i.e. CH3) 5 by reaction with an alkylating agent by physical grinding or by using green solvent like PEG-600 or by using microwave irradiation technique.
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