Reactions of selenazadienes with chloroacetonitrile yielded 1,3-selenazol-5-carbonitriles in moderate to high yields. Reactions of the selenazadienes with chloroacetyl chloride and then with amines gave 1,3-sele-nazole-5-carboxamides.
Hetero Diels-Alder reaction of selenazadiene with dimethyl acetylenedicarboxylate yielded 4-selenazolone instead of the expected Diels-Alder adduct.
The Interplay of Thio(seleno)amide/Vinylogous Thio(seleno)amide “Resonance” and the Anisotropic Effect of Thiocarbonyl and Selenocarbonyl Functional Groups
spectra assigned. Both the NMR data and the results of theoretical calculations at the abinitio level of theory were employed to elucidate the adopted structures of the compounds in terms of E/Z isomerism and s-cis/s-trans configuration. In the case of the asymmetrically N(Me)Ph-substituted compounds, abinitio GIAO-calculated ringcurrent effects of the N-phenyl group were applied to successfully determine