Catalytic Synthesis of <i>N</i>-Arylsubstituted 1,5,3-Dithiazocanes
An efficient method has been developed for the synthesis of N -arylsubstituted 1,5,3-dithiazocanes and biphenylene-bis-1,5,3-dithiazocanes by heterocyclicization of N <sup>1</sup>, N <sup>1</sup>, N <sup>7</sup>, N <sup>7</sup>-tetramethyl-2,6-dithiaheptane-1,7diamine with aromatic amines and diaminobiphenyls in the presence of Sm(NO3)3·6H2O as a catalyst.