New N, N′-dibenzylthiophosphorodiamidate derivatives were synthesized from the corresponding thiophosphorodichloridate intermediates and benzylamine. Several compounds with formula 2-MeC6H4OP (S)(NHBn) 2 (6), 2-FC6H4OP (S)(NHBn) 2 (7), 2- ClC6H4OP (S)(NHBn) 2 (8), 4-MeC6H4OP (S)(NHBn) 2 (9) and 4-t-BuC6H4OP (S)(NHBn) 2 (10) were synthesized and characterized by 1H, 13C, 31P NMR, IR, mass spectroscopy ...