New approaches to pyrimido[4,3-b][1,3,5]selenadiazines |
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Authors: | K A Frolov V V Dotsenko S G Krivokolysko |
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Institution: | 1. Research Laboratory ??ChemEx??, Vladimir Dal?? East-Ukrainian National University, 20a Molodezhnyi kv., 91034, Lugansk, Ukraine
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Abstract: | The Mannich reactions of (arylmethylidene)(cyano)selenoacetamides with primary amines and formaldehyde gave 3,7-disubstituted 8-R-3,4,7,8-tetrahydro-2H,6H-pyrimido4,3-b]-1,3,5]selenadiazine-9-carbonitriles. Alternatively, these compounds can be obtained by reactions of 4-R-2,6-diamino-4H-selenopyran-3,5-dicarbonitriles with primary amines and form-aldehyde or by multicomponent condensation of an appropriate aldehyde, cyanoselenoacet-amide, a primary amine, and formaldehyde. |
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