On irradiation at 366 nm in the presence of benzophenone, the title 2pyridone derivatives (1) in nitrogen-saturated acetonitrile underwent sensitized decomposition to give arylaldehyde and 2-methoxypyridine in addition to the expected N-O bond cleavage products: 1-arylethanol, arylmethylketone, and 2-5 was made because the HPLC signals of 2 and 5 overlap strongly with those arising from the eluent and the starting 1, respectively.15.
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Sakurai et al. (2009) studied this question.
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