Synfacts 2005(1): 0119-0119  
DOI: 10.1055/s-2005-872206
Synthesis of Heterocycles
© Georg Thieme Verlag Stuttgart · New York

Cycloaddition of Carbodiimides to Selenazetidines

Contributor(s): Victor Snieckus, Robert Engqvist
G. L. Sommen, A. Linden, H. Heimgartner
Universität Zürich, Switzerland
Further Information

Publication History

Publication Date:
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.