Irradiation of the title compounds Ar(CH2)nNHPh (Ar = 10-bromo-9-phenanthryl, n= 3, 4, 5, 6, 10) gave debrominated aniline derivatives in all cases. For n= 3 and 4, the cyclic compounds 4a,b were isolated in moderate yields. A photo-induced electron-transfer mechanism is proposed.
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Sugimoto et al. (1992) studied this question.
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