Novel, diethyl 1-(isothiocyano)alkylphosphonates 3 have been efficiently sy
nthesized via a one-pot reaction of diethyl 1-azidoalkylphosphonates 1 with
triphenylphosphine, followed by in situ transformation of thus formed phos
phazenes 2 with carbon disulfide. Application of the title compounds in the
synthesis of diethyl (N-phenylthioureido)- and (benzothiazol-2-ylamino)met
hylphosphonates was also described.