Synlett 2025; 36(18): 3000-3011
DOI: 10.1055/a-2630-1454
Account

Catalytic C–C Bond Formation via Aromatic C–H Bond Cleavage Using Low-Valent Iron-Phosphine Complexes

Autor*innen

  • Fumitoshi Kakiuchi

    1   Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, Japan (Ringgold ID: RIN12869)
    2   JST, CREST, Kawaguchi, Japan (Ringgold ID: RIN263959)
  • Takuya Kochi

    1   Department of Chemistry, Faculty of Science and Technology, Keio University, Yokohama, Japan (Ringgold ID: RIN12869)

Gefördert durch: Core Research for Evolutional Science and Technology JPMJSP2123


Graphical Abstract

Abstract

This article presents our findings on catalytic ortho-selective C–C bond formations through the cleavage of C–H bonds in aromatic ketones using low-valent iron-phosphine complexes. We describe four types of catalytic transformations that convert C–H bonds into C–C bonds. Reactions involving terminal alkenes, such as vinyl and allylsilanes, aliphatic alkenes, styrenes, vinyl ethers, and enamines, yield the corresponding linear alkylation products. The coupling reaction using methylenecyclopropanes yields homoallylation products via alkene 1,2-insertion, followed by β-carbon elimination. The C–H alkenylation can be achieved by the reaction with internal alkynes. The use of 1,n-enynes (where n = 6, 7) as coupling partners for the C–H bond led to hydroarylative enyne cyclization products. The results of deuterium-labeling experiments of these reactions are also discussed.



Publikationsverlauf

Eingereicht: 30. April 2025

Angenommen nach Revision: 06. Juni 2025

Artikel online veröffentlicht:
24. Juli 2025

© 2025. Thieme. All rights reserved.

Georg Thieme Verlag KG
Oswald-Hesse-Straße 50, 70469 Stuttgart, Germany