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Synthesis 1991; 1991(3): 189-191
DOI: 10.1055/s-1991-26414
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Synthesis of Dihydro-1,2,4-triazolo[1,5-a]pyrimidines

Kurt Wermann* , Manfred Hartmann
  • *Institut für Organische Chemie and Makromolekulare Chemie der Friedrich-Schiller-Universität Jena, Humboldtstraße 10, DDR-6900 Jena, Germany
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Publication History

Publication Date:
17 September 2002 (online)

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Several 5,7-diaryl-4,5-dihydro-5-methyl-1,2,4-triazolo[1,5-a]pyrimidines 3a-f and 5,7-diaryl-4,7-dihydro-7-methyl-1,2,4-triazolo[1,5-a]pyrimidines 4a-f were synthesized in high yield from 5-amino-1H-1,2,4-triazole (amitrole) (1) and acetophenones 2 by heating in the presence of zinc chloride and subsequent separation of the isomers.