Abstract
The reaction of 1,1,1-trifluoro-4-(sulfonyl)-but-3-ene-2,2-dioles 1a ,b with corresponding aminoazoles was investigated. A new simple and efficient way for the regioselective synthesis of 5-CF3 or 7-CF3 triazolo- and tetrazolopyrimidines is described.
Key words
cycloaddition - heterocycles - triazolopyrimidine - tetrazolopyrimidine - sulfones
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