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This work describes the synthesis of new 4-substituted-pyrazolo[3,4-d]pyridazinones (R=C 6 H 5 , 4-F-C 6 H 4 , benzofur-2-yl, CF 3 , 4-NO 2 -C 6 H 4 ) from the reaction of dicarbonylpyrazoles with hydrazine hydrate. Solid and solution-state NMR were used to unequivocally assign the structure and identification of the byproduct formed...
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