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Synthesis 1990; 1990(11): 1095-1100
DOI: 10.1055/s-1990-27103
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Synthesis of a Novel Ring-Expanded Xanthine Analogue and Several Methyl or Benzyl Derivatives Containing the 5:7-Fused Imidazo [4,5-e][1,2,4]triazepine Ring System

Ramachandra S. Hosmane* , Vishweshwar S. Bhadti, Benjamin B. Lim
  • *Laboratory for Chemical Dynamics, Department of Chemistry and Biochemistry, University of Maryland Baltimore County, Baltimore, Maryland 21228, USA
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Publication Date:
17 September 2002 (online)

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Syntheses of 3,4,6,7-tetrahydroimidazo[4,5-e][1,2,4]triazepine-5,8-dione (1a) and its 3- and/or 7-methyl/benzyl substituted derivatives 1b-1e are reported. The structure of 1c is confirmed by single-crystal X-ray diffraction analyses.