Studies on Photodecomposition of an Oxime Sulfonate

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  • Asakura Toshikage
    Development Electronic Specialties, Dispersions and Pigments AsiaPacific, BASF Japan Ltd. Catalysis Research Center (CRC) and Graduate School of Chemical Sciences and Engineering, Hokkaido University,
  • Yamato Hitoshi
    Organic Electronics Research, BASF Japan Ltd.
  • Tanaka Keita
    Organic Electronics Research, BASF Japan Ltd.
  • Takahashi Ryuichi
    Organic Electronics Research, BASF Japan Ltd.
  • Kura Hisatoshi
    Development Electronic Specialties, Dispersions and Pigments AsiaPacific, BASF Japan Ltd.
  • Nakano Tamaki
    Catalysis Research Center (CRC) and Graduate School of Chemical Sciences and Engineering, Hokkaido University,

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The authors concluded in this paper that the proton of the ethenylene with the chemical shift at higher magnetic field is located next to sulfur referring the experimental results reported by Klemm et al. with 4-nitro-thienopyridine derivatives. However it is notable that assignments of H-2 and H-3 may be reversed. In cases of 13C NMR, the results from HSQC indicate the carbons directly attaching to hydrogen atoms and those from HMBS indicate long range coupling in 2-3 carbon sequences. Especially, even in 1D spectroscopy, the carbons locating at distinctively low magnetic field, around 161 ppm for C-9a and 145-147 ppm for C-8a, showed good match with the results previously reported and are key to determine the baseline structure of the products. Authors finally conclude that a 4-cyanothienoquinoline base-structure reasonably explains the experimental results obtained without any contradiction and that the chemical structure of Product A and B.

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