Abstract: Condensation of N-chloroacetyl derivatives of several aromatic amines or aryl ureas with sodium O,O-dimethyl dithiophosphate gave the expected dithiophosphates carrying amide linkage. However, α-chloro-p-(chloro- or bromo)-acetanilide under similar conditions gave α,α'-dithio-bis-p-(chloro- or bromo)-acetanilide. Various phosphorylamides were prepared on condensation of substituted phenols, phosphorus oxychloride and substituted anilines in the presence of pyridine. Feebly basic 2,4,6-tribromoaniline failed to give aromatic phosphorylamides, but formed α-(2,4,6-tribromoanilino)-2,4,6-tribromoacetanilide on chloroacetylation.