A b s t r a c t -Irradiation o f 1-alkylisatins ( 1 ) in degassed alcohols afforded 1 -alkyl-3-hydroxyoxindoles ( 2 ) and 1-alkyloxindoles ( 3 ) as chemoselective photoproducts.The photochemical behavior of carbonyl groups of cyclic vicinal polyketones has received considerable attention in the last few years.'On the other hand, the photochemical reactions of heterocyclic vicinal diketones have also attracted interest from synthetic viewpoints.'Recently, it has been reported that photochemical reaction of
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Tatsugi et al. (1996) studied this question.