Synthesis and bio-activity of novel iminophosphoranes

The title compounds (5a‐j) were synthesized by a two step process. 4‐Chlorophenyl and bis(2‐chloroethyl) amino‐dibromophosphites (1a and 1b) were reacted with 1,8‐diaminonaphthalene (2) to form the diazaphosphinines (3a and 3b). They were further reacted with different alkyl azides (4a‐e) in THF at 50‐55 °C under N2 atmosphere to afford the corresponding iminophosphoranes (5a‐j). Their structures were established by elemental analysis, IR, 1H, 13C, 31P NMR and Mass spectral data. All of them exhibited moderate antibacterial activity.