ZnCl2??Mediated Synthesis of Carboxylic Anhydrides using 2??Acyl??4, 5??dichloropyridazin??3 (2 H)??ones

YD Park, JJ Kim, HK Kim, SD Cho, YJ Kang…

文献索引：Park, Yong-Dae; Kim, Jeum-Jong; Kim, Ho-Kyun; Cho, Su-Dong; Kang, Young-Jin; Park, Ki Hun; Lee, Sang-Gyeong; Yoon, Yong-Jin Synthetic Communications, 2005 , vol. 35, # 3 p. 371 - 378

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被引用次数: 13

摘要

Abstract ZnCl2 is an efficient catalyst for synthesis of carboxylic acid anhydride from 2??acyl?? 4, 5??dichloropyridazin??3 (2 H)??ones. Treatment of 2??acyl??4, 5??dichloropyridazin??3 (2 H)?? ones with ZnCl2 (0.5 equivalents) and air in refluxing dry THF or acetonitrile gave the corresponding symmetric acid anhydrides in good to excellent yield.