2-(Methylchalcogenomethyl)diphenyl selenoxides 1 and 2-{2 -(N,N-dimethylamino)ethyl}

Selenonium imides 1 and 2, stabilized by intramolecular coordination of the amino group of 8-dimethylamino-1-naphthyl substituent to the selenium atom, were synthesized. Optically active selenonium imides were obtained by chromatographic resolution on optically active columns and were found to be stable toward racemization both in the solid state and in solution. Absolute configurations of the optically active selenonium imides were assigned on the basis of specific rotations and circular dichroism spectra.