Abstract
Isothiocyanatochloromethyl(thio)phosphonates and (thio)-phosphinates 1 (X=O, S; R1 = OPh, CH2Cl, NCS; R2 = H, Cl have been found to be convenient starting material for synthesis of a variety of S (Se), N, P-containing cyclic compounds. They react with different proton containing nucleophiles in the presence of a base with formation of saturated 2 and unsaturated 3 five membered phosphacyclanes. Diisothiocyanatodichloromethylphosphonates 1 (R1 = NCS, R2 =Cl) produce with amines and thiols appropriate bicyclic compounds 4.