Dibenzoylmethane in the Synthesis of Selenium-Containing Di- and Tetrahydropyridine-3-carbonitriles

Upon the interaction of cyanoselenoacetamide, 2-furan- or 2-thiophenocarbaldehydes and dibenzoylmethane in ethanol in the presence of an excess of piperidine or morpholine under argon, 6-hydroxy-3-cyano-1,4,5,6-tetrahydropyridine-2-ammonium selenolates were obtained, which were used in the synthesis of 2-alkylselenodi- and tetrahydropyridine-3- carbonitriles. The structure of the latter was studied using the method of X-ray diffraction analysis.