Cycloaddition of Carbodiimides to Selenazetidines
G. L. Sommen, A. Linden, H. Heimgartner
Universität Zürich, Switzerland
21 September 2005 (online)
A new [2+2] cycloaddition of aromatic and aliphatic isoselenacyanates with dicyclohexyl and diisopropyl carbodiimide to give selenazetidines in very good yields is reported. Although the scope was not investigated, the reaction provides an unusual heterocyclic system. A similar system has been prepared from a substituted selenaurea and thiophosgene but in only 45% yield. The structures were confirmed by X-ray crystallographic analysis.