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Difluoromethylation of 2-hydroxychalcones using sodium 2-chloro-2,2-difluoroacetate as difluoromethylating agent

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Abstract

Difluoromethylation of 2-hydroxychalcones using sodium 2-chloro-2,2-difluoroacetate as the difluoromethylating agent was developed. Under facile conditions, a wide range of aryl difluoromethyl ethers were obtained in yields of 36%–80%. It is noteworthy that the new addition products, 2,2-difluoro-2H-benzofuran derivatives, were also synthesized in the reactions. The yield of 2,2-difluoro-2H-benzofuran derivative could be up to 35% when 3-methyl-2-hydroxychalcone was used as the reactant. A plausible reaction mechanism was proposed.

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Correspondence to Mingqing Hua or Qi Zhang.

Additional information

Supported by the National Natural Science Foundation of China(Nos.21302071, 21261008, 21204031), the Natural Science Foundation of Jiangsu Province, China(No.BK20130484), the Scientific Research Foundation for Advanced Talents of Jiangsu University, China(No.12JDG089/14JDG054) and the Hainan International Science and Technology Cooperation, China (No.KJHZ2014-05).

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Wang, W., Hua, M., Huang, Y. et al. Difluoromethylation of 2-hydroxychalcones using sodium 2-chloro-2,2-difluoroacetate as difluoromethylating agent. Chem. Res. Chin. Univ. 31, 362–366 (2015). https://doi.org/10.1007/s40242-015-4456-0

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  • DOI: https://doi.org/10.1007/s40242-015-4456-0

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