4.8 Article

Photocatalytic Decarboxylative [2+2+m] Cyclization of 1,7-Enynes Mediated by Tricyclohexylphosphine and Potassium Iodide

Journal

ORGANIC LETTERS
Volume 22, Issue 22, Pages 8819-8823

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.0c03182

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Funding

  1. National Natural Science Foundation of China [21625203, 21871126, 22001108]
  2. Jiangxi Educational Committee Foundation of China [GJJ190535]
  3. Jiangxi Province Science and Technology Project [20202BAB213004]

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A novel photocatalytic decarboxylative [2 + 2 + m] cyclization of 1,7-enynes with alkyl N-hydroxyphthalimide (NHP) esters, using tricyclohexylphosphine and potassium iodide as redox catalysts, is reported for the construction of functional polycyclic compounds. This protocol tolerates primary, secondary, and tertiary alkyl NHP esters through a single reaction via decarbonylation, radical addition, C-H functionalization, and cyclization under mild conditions.

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