4.5 Article

Copper-Catalyzed Direct C-3 Benzylation of Quinoxalin-2(1H)-ones with Methylarenes under Microwave Irradiation

Journal

EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
Volume 2018, Issue 30, Pages 4113-4120

Publisher

WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.201800697

Keywords

Nitrogen heterocycles; Arenes; Benzylation; Copper; Radical reactions; Reaction mechanisms

Funding

  1. Department of Henan Province Natural Science and Technology Foundation [172102210225, 172102210222]
  2. Natural Science Foundation in Henan Province Department of Education [17A150005, 17A150007]
  3. Program for Innovative Research Team from Zhengzhou [131PCXTD605]
  4. Project of Youth Backbone Teachers of Henan University of Technology [2016003]

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A novel and efficient approach to the C(sp(2))-H/C(sp(3))-H oxidative coupling of quinoxalin-2(1H)-ones with methylarenes by using Cu-I as catalyst is reported. Various substrates were well tolerated in this methodology and the desired products were given in moderate-to-good yields. This reaction features good functional group compatibility and broad substrate scope.

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