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Paper | Special issue | Vol 79, No. 1, 2009, pp.703-720
Published online, 25th November, 2008
DOI: 10.3987/COM-08-S(D)37
5,5’-Bipyridyl-2,4,6,2’,4’,6’-hexaone Derivatives (Hydurilic Acids): Syntheses, Mechanism of C-C-Bond Formation and Properties of the Dimeric Barbituric Acid Derivatives

Christa E. Müller,* Carolin Roegler, and Jörg Hockemeyer

*Pharmaceutical Institute Poppelsdorf, University of Bonn, Kreuzbergweg 26, D-53115 Bonn, Germany

Abstract

A series of hydurilic acid derivatives (5,5’-bipyrimidinyl-2,4,6,2’,4’,6’-hexaones) including several new derivatives was synthesized from 5,6-diaminouracils. Mechanisms for their formation are proposed and discussed. Furthermore, a new method for the preparation of pyrimidine-2,4,5,6-tetraone-5-oxime derivatives (violuric acids) was found starting from 5-amino-6-nitrosouracils.