Abstract
Aminomethylation of triethylammonium 4-aryl-3,5-dicyano-6-oxo-1,4,5,6-tetrahydropyridin-2-olates and their sulfur and selenium analogs, as well as the structure of formed products, were studied in details. The reaction is of general character and leads to the formation of 7-substituted 9-aryl-2,4-dioxo-, 9-aryl-4-oxo-2-thioxo-, 9-aryl-4-oxo-2-selenoxo-3,7-diazabicyclo[3.3.1]nonane derivatives or their salts. The structures of ethyl 9-(2-chlorophenyl)-5-cyano-7-(4-methylphenyl)-2-oxo-4-thioxo-3,7-diazabicyclo[3.3.1]nonane-1-carboxylate (as a complex with N-methylmorpholine) and triethylammonium salt of 7-benzyl-4-oxo-2-selenoxo-9-(2-thienyl)-3,7-diazabicyclo[3.3.1]nonane-1,5-dicarbonitrile were studied by X-ray crystallography.
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