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Synthesis 1990; 1990(8): 721-723
DOI: 10.1055/s-1990-26994
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Fused Tetrazolo[1,5-a]pyrimidines and 2-Azidopyrimidines from 2-Acyl-1,3-indandiones and 5-Aminotetrazole

Thomas Russ* , Jan W. Bats, Walter Ried
  • *Institut für Organische Chemie der Universität Frankfurt am Main, Laboratorium Niederrad, Theodor-Stern-Kai 7, D-6000 Frankfurt/Main 70, Federal Republic of Germany
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Publication Date:
17 September 2002 (online)

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Cyclocondensations of 2-acyl-1,3-indandiones 1a-e and 5-amino-tetrazole monohydrate (2) in ethanol in the presence of catalytic amounts of acetic acid afford indeno[1,2-d]tetrazolo[1,5-a]pyrimidin-6-ones 3a-c or 2-azidoindeno[1,2-d]pyrimidin-5-ones 4a,b in a single step depending on the nature of the acyl substituent R. The structure of 3c was confirmed by X-ray analysis.