Studies on the synthesis of heterocyclic compounds. V. Preparation of 1,3,2-benzoxathiaphosphole,arsole and stibole derivatives by exchange methods

A new convenient method for synthesis of heterocyclic compounds of five-membered rings containing an O-M-S (M = P, As, Sb) linkage is described. The compounds IIIa-c, IVa-b, Va-b, Viand VII were prepared starting from 2,2-dimethyl-1,3,2-benzoxathiastannole (II) and derivatives of phosphorus, arsenic and antimony. The structures of newly prepared compounds was determined by elemental analysis, spectroscopic methods (ir, nmr and ms) and comparison with authentic samples obtained via a different manner.