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Université de Neuchâtel

A surprising double carbon–nitrogen coupling reaction catalyzed by [H3Ru4 (C6H6)4 (OH)] 2+ : synthesis of unusual barbiturate analogues

Chérioux, Frédéric ; Süss-Fink, Georg

In: Tetrahedron Letters, 2002, vol. 43, p. 6653-6655

Seven- and eight-membered analogues of barbituric acid are easily accessible by insertion of carbodiimides into cyclic anhydrides catalyzed by the cationic hydroxo cluster [H3Ru4 (C6H6)4 (OH)] 2+.