4.8 Article

N-Heterocyclic Carbene-Catalyzed δ-Carbon LUMO Activation of Unsaturated Aldehydes

Journal

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 137, Issue 17, Pages 5658-5661

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/jacs.5b02219

Keywords

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Funding

  1. Singapore's National Research Foundation (NRF)
  2. Ministry of Education (MOE)
  3. Nanyang Technological University (NTU)
  4. China's National Key Program for Basic Research [2010CB 126105]
  5. Thousand Talent Plan, National Natural Science Foundation [21132003, 21472028]
  6. Guizhou Province Returned Oversea Student Science and Technology Activity Program
  7. Guizhou University

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An N-heterocyclic carbene (NHC) catalyzed domino reaction triggered by a delta-LUMO activation of alpha,beta-gamma,delta-diunsaturated enal has been developed for the formal [4 + 2] construction of multisubstituted arenes and 3-ylidenephthalide. These two products, formed in a highly chemo- and regioselective manner, were obtained via different catalytic pathways due to a simple change of the substrate. The activation of the remote delta-carbon of unsaturated aldehydes expands the synthetic potentials of NHC organocatalysis.

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