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Esterification of aliphatic or aromatic carboxylic aci ds with alcohols using 2-(4-nitrobenzenesulfonyl)-4,5dichloropyridazin-3(2H)-one (3) in the presence of base in organic solvents gave the corresponding esters in excellent yields

An Efficient and Convenient Esterification of Carboxylic Acids Using 4,5-Dichloro-2-[(4-nitrophenyl)sulfonyl]pyridazin-3(2H)-one