Abstract
The condensation of 3-amino-1,2,4-triazole with 2′-hydroxychalcones gives 7-aryl-5-(2-hydroxyphenyl)-4,7(6,7)-dihydro-1,2,4-triazolo[1,5-a]pyrimidines. Both tautomeric forms were isolated for a number of these compounds. PMR spectroscopy was used to show that the enamine form is predominant in DMSO in contrast to the case in CHCl3.
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