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ChemInform Abstract: Synthesis of 4-Alkyl-6-amino-3,5-dicyano-2(1H)-pyridinethiones.

โœ Scribed by V. D. DYACHENKO; S. G. KRIVOKOLYSKO; V. N. NESTEROV; V. P. LITVINOV

Publisher
John Wiley and Sons
Year
2010
Weight
38 KB
Volume
29
Category
Article
ISSN
0931-7597

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Synthesis of 2,6-Diamino-3,5-dicyano-4-ethyl-4H-thiopyran and Its Recyclization into 6-Amino-3,5-dicyano-4-ethylpyridine-2(1H)-thione. -Three component condensation of propionaldehyde with malononitrile and cyanothioacetamide provides the title diaminothiopyran (IV) which recyclizes at reflux into