Published January 1, 2017
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A novel ditopic ring-expanded N-heterocyclic carbene ligand-assisted Suzuki-Miyaura coupling reaction in aqueous media
Creators
- 1. Inonu Univ, Catalysis Res & Applicat Ctr, TR-44280 Malatya, Turkey
- 2. Inonu Univ, Fac Sci & Arts, Dept Chem, TR-44280 Malatya, Turkey
- 3. Univ Sargodha, Dept Phys, Sargodha, Pakistan
- 4. Sci & Technol Res & Council Turkey, Pk 80, TR-06100 Ankara, Turkey
Description
A series of seven-membered ditopic ring-expanded N-heterocyclic carbene (dre-NHC) precursors, bearing sterically demanding and electron-rich aryl groups, were synthesised in moderate yields via the reaction of 1,2,4,5-tetrakis(bromomethyl)benzene with the corresponding N,N'-diarylformamidines in the presence of K2CO3 in acetonitrile under an air atmosphere. All new compounds were characterised by HRMS, NMR spectroscopy, and microanalysis, as well as X-ray crystallography for compound lc. The development of an efficient catalytic system for the Suzuki-Miyaura coupling reaction of aryl chlorides with various boronic acids was also investigated using the in situ generated dre-NHC ligands. (C) 2017 Elsevier Ltd. All rights reserved.
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