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Browsing by Author "Sener, M.K."

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    Studies on Reactions of Cyclic Oxalyl Compounds With Hydrazines or Hydrazones. 2. Synthesis and Reactions of 4-Benzoyl 1h-Pyrazole Acid
    (2004) Sener, A.; Kasimogullari, R.; Sener, M.K.; Genc, H.
    4-Benzoyl-1-(4-nitrophenyl)-5-phenyl-1H-pyrazole-3-carboxylic acid, obtained from the corresponding furan-2,3-dione and N-benzylidene-N'-(4- nitrophenyl)hydrazine, was converted via reactions of its acid chloride with various alcohols or N-nucleophiles into the corresponding ester or amide derivatives. The nitrile of the starting acid and 1-(4-aminophenyl)-4-benzoyl-5- phenyl-1H-pyrazole-3-carboxylic acid were also obtained. While cyclocondensation reactions of the two acids and the nitrile mentioned with hydrazines lead to pyrazolo[3,4-d]pyridazine derivatives, the reaction of starting acid with 2-hydrazinopyridine provided the hydrazonopyrazole acid derivative.