Synthesis of new aryl / alkyl phosphonates 3a-j has been accomplished via a MichaelisArbuzov-type rearrangement by the reaction of aryl / alkyl halide (1a-j) with triethyl phosphite (2) in dry toluene at reflux temperature. Products 3a-j were characterized by IR, 13 C and 31 P NMR and their antibacterial activity was evaluated.

C, and 31 P NMR spectra, and their antibacterial activity was evaluated.

New class of macrocyclic aryloxy phosphoranes (10a-d, 11a-d, 12a-d) were prepared by reactants the bifunctional synthons (7-9) with bis(2/3-chloroalkyl)phenyl triester of phosphoric acid (5a-d) in the presence of aq.NaOH in n-BuOH in moderate yields. Their chemical structures were established by analytical and spectral (IR, 1 H, 13 C and 31 P and Mass) data.