A novel series of O, O′, O ″, O”′-tetraaryldithioimidophonates [(ArO) 2 PS] 2 NH 4 were synthesized by the reaction of O, O,-diaryl phosphorochlorothionates 2 and diarylphosphonothioic amide under a strong basic condition. The key intermediates 2a∼ 2g