Synthesis of Cyanamides from Isoselenocyanates Promoted by Recyclable Ionic Liquid-Supported (Diacetoxyiodo)Benzene

Abstract

One-pot synthesis of cyanamides from isoselenocyanates through deselenisation promoted by ionic liquid-supported hypervalent iodine(III) reagent 1-(4-diacetoxyiodobenzyl)-3-methylimidazolium tetrafluoroborate ([dibmim] + [BF 4 ] − ) was developed. This approach provided a simple, mild and environmentally benign way to construct cyanamides in good yields. Moreover, powder Se and [dibmim] + [BF 4 ] − could be easily recycled. It was the first example of [dibmim] + [BF 4 ] − to be used as a deselenising agent.