Selenium-nitrogen bond formation by ring expansion: Synthesis of the 1,4,2-diselenazine ring system, fragmentation to a 1,2-diselenete and reactions to yield 1,4-diselenin derivatives

Article abstract of DOI:10.1039/CC9960002375

1,3-Diselenolium cation salt 1 reacts with ammonia and iodine to afford the novel 1,4,2-diselenazine system 6 (40% yield) which fragments to yield dimethylcyanamide 8 and diselenin 9, presumably via intermediate 1,2-diselenete 7, which is trapped with dimethyl acetylenedicarboxylate to yield the cycloadduct 10.

Full text of DOI:10.1039/CC9960002375

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