Reactions of Some Pyrazole-3-CarboxyIic Acid and Carboxylic Acid Chlorides with Various Alcohols

摘要

The reactions of 4-benzoyH-(2,4-dinitrophenyl)-5-pheny-1H-pyrazole-3-carboxylic acid (2b), 4-benzoyl-1-(4-aitrophenyl)-5-phenyl-1H-pyrazole-3-carboxylic acid chloride (3a) and 4-benzoyl-1-(2,4-dinitrophenyl)-5-phenyl-1H-pyrazole-3-carboxylic acid chloride (3b) can easily be converted into the corresponding ester 5, from reaction with various alcohols. It has been demonstrated that with the variation in reaction conditions, the reaction changes leading to different products. All newly synthesized compounds were characterized by elemental analysis, IR, ~1H and ~(13)C NMR spectral data. All compounds were compared with their previous analogues.