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The pyridazine hexafluorophosphate [C 4 H 5 N 2 ] + [PF 6 ] − (1) undergoes a reversible phase transition around 140K, which was confirmed by the DSC measurement. Variable-temperature crystal structures determined at 293K and 93K show that the compound crystallizes in the same space group P2 1 /c, indicating that 1 undergoes an iso-structural...
To further expand an effective modified route for the shift from an antibacterial fluoroquinolone (FQ) to an antitumor FQ, two series of title compounds based on an isostere of the FQ C3 carboxylic group with two fused heterocyclic rings, [1,2,4]triazolo[3,4-b][1,3,4]thiadiazine and pyrazolo[5,1-c][1,2,4]triazole, respectively, were designed and synthesized starting from the current antibacterial...
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