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11B NMR Spectroscopy

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Marcos A P Martins – One of the best experts on this subject based on the ideXlab platform.

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John A. Maguire – One of the best experts on this subject based on the ideXlab platform.

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Helio G Bonacorso – One of the best experts on this subject based on the ideXlab platform.

  • synthesis 11B and 19f NMR Spectroscopy and optical and electrochemical properties of novel 9 aryl 3 aryl heteroaryl 1 1 difluoro 7 trifluoromethyl 1h 1 3 5 2 oxadiazaborinino 3 4 a 1 8 naphthyridin 11 ium 1 uide complexes
    Tetrahedron Letters, 2016
    Co-Authors: Helio G Bonacorso, Tainara P Calheiro, Bernardo A Iglesias, Iuri R C Berni, Eufrânio N Da Silva, Joao Rocha, Nilo Zanatta, Marcos A P Martins
    Abstract:

    Abstract A new series of nine examples of 9-aryl-3-(aryl/heteroaryl)-1,1-difluoro-7-(trifluoromethyl)-1H-[1,3,5,2]oxadiazaborinino[3,4-a][1,8]naphthyridin-11-ium-1-uides, which contained 1,8-naphthyridine-based boron complexes with variable ligand structures, were synthesized at yields of 50–65% from the reaction of unpublished 2-benzoylamino-7-aryl(heteroaryl)-5-trifluoromethyl-1,8-naphthyridines—in which aryl(heteroaryl) = phenyl, 4-MeC6H4, 4-FC6H4, 4-BrC6H4, 4-OMeC6H4, 4-NO2C6H4, and 2-thienyl—with BF3·Et2O and fully characterized by 1H-, 13C-, 19F-, and 11B NMR Spectroscopy and X-ray diffractometry. The optical and electrochemical properties of the new complexes were investigated, and the results for quantum yield calculations, Stokes shift, UV–vis, fluorescence, and redox potential data analysis indicated an important relationship with the aryl(heteroaryl) substituents attached to the 3- and 9-position of the naphthyridine boron complexes.

  • Synthesis, 11B– and 19F NMR Spectroscopy, and optical and electrochemical properties of novel 9-aryl-3-(aryl/heteroaryl)-1,1-difluoro-7-(trifluoromethyl)-1H-[1,3,5,2]oxadiazaborinino[3,4-a][1,8]naphthyridin-11-ium-1-uide complexes
    Tetrahedron Letters, 2016
    Co-Authors: Helio G Bonacorso, Tainara P Calheiro, Bernardo A Iglesias, Iuri R C Berni, Joao Rocha, Nilo Zanatta, Eufrânio N. Da Silva Júnior, Marcos A P Martins
    Abstract:

    Abstract A new series of nine examples of 9-aryl-3-(aryl/heteroaryl)-1,1-difluoro-7-(trifluoromethyl)-1H-[1,3,5,2]oxadiazaborinino[3,4-a][1,8]naphthyridin-11-ium-1-uides, which contained 1,8-naphthyridine-based boron complexes with variable ligand structures, were synthesized at yields of 50–65% from the reaction of unpublished 2-benzoylamino-7-aryl(heteroaryl)-5-trifluoromethyl-1,8-naphthyridines—in which aryl(heteroaryl) = phenyl, 4-MeC6H4, 4-FC6H4, 4-BrC6H4, 4-OMeC6H4, 4-NO2C6H4, and 2-thienyl—with BF3·Et2O and fully characterized by 1H-, 13C-, 19F-, and 11B NMR Spectroscopy and X-ray diffractometry. The optical and electrochemical properties of the new complexes were investigated, and the results for quantum yield calculations, Stokes shift, UV–vis, fluorescence, and redox potential data analysis indicated an important relationship with the aryl(heteroaryl) substituents attached to the 3- and 9-position of the naphthyridine boron complexes.