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The thio-and selenocyanation of quinone monoimines of pyrido[1,2-a]benzimidazole series with the participation of dithiocyanogen and triselenodicyanide in mild reaction conditions results in formation of 9-or 6-thiocyano-and 9-selenocyano-derivatives in good yields.

Organo-selenium compoundsOrgano-selenium compounds S 0130 Triselenium Dicyanide from Malononitrile and Selenium Dioxide: One-Pot Synthesis of Selenocyanates. -Malononitrile reacts with selenium dioxide in DMSO to give triselenium dicyanide (II). Addition of aromatic amines, indoles and active methylene compounds produces the corresponding selenocyanates in one pot. -(KACHANOV*, A. V.; SLABKO, O. Y.; BARANOVA, O. V.; SHILOVA, E. V.; KAMINSKII, V. A.; Tetrahedron Lett. 45 (2004) 23, 4461-4463; Dep. Chem., Far East. State Univ., Vladivostok 690950, Russia; Eng.) -Mais 37-173

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in Wiley Online Library (wileyonlinelibrary.com).Salts of 5-amino-4-cyano-3-dicyanomethylene-2-pyrrolinone are formed by action of dilute aqueous solutions of alkalis on pentacyanopropenide-anion salts. These cyclic salts are transformed to 2,6-diamino-3, 5-dicyanoisonicotinates by subsequent action of alkalis.