ChemInform Abstract: A New Synthesis of Isoselenoureas by Imidoylation of Amines with Selenium and Isocyanides.
Abstract
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ChemInform Abstract
Lithiation of secondary amines followed by transmetalation with selenium and reaction with isocyanides generates lithium selenocarbamidites. They are trapped by butyl iodide to yield isoselenoureas of type (IV). When tellurium is used instead of selenium, the urea (VI) is isolated probably via hydrolysis of the isotellurourea (V) during work-up. Replacing the isocyanide by carbon monoxide results in clean carbonylation to give the selenocarbamate (VIII).
