Synthesis of 2-Aryl Naphthoquinones by the Cross-Dehydrogenative Coupling Involving an NHC-Catalyzed endo-Stetter Reaction
Arghya Ghosh, Atanu Patra, Subrata Mukherjee, Akkattu T. Biju*
*Department of Organic Chemistry, Indian Institute of Science, Bangalore 560012, India, Email: atbijuiisc.ac.in
A. Ghosh, A. Patra, S. Mukherjee, A. T. Biju, J. Org. Chem., 2019, 84, 1103-1110.
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An N-heterocyclic carbene (NHC)-catalyzed intramolecular Stetter reaction enables a transition-metal-free and mild cross-dehydrogenative coupling of 2-cinnamoyl benzaldehydes to provide 2-aryl naphthoquinones. The intramolecular Stetter reaction is followed by an aerobic oxidation to reinstall the C-C double bond.
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Stetter reaction, cyclization, air, organocatalysis