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Communication | Regular issue | Vol 22, No. 1, 1984, pp.59-62
Published online, 1st January, 1970
DOI: 10.3987/R-1984-01-0059
Oxidative Transformation of Tryptophan to 5-Hydroxy-N’-formylkynurenine

Masako Nakagawa,* Yukio Yokoyama, Shiro Kato, and Tohru Hino

*Faculty of Pharmaceutical Sciences, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan


Dye-sensitized photooxygenation of L-tryptophan in an alkaline phosphate buffer followed by NaBH4 reduction afforded 3a,5-dihydroxypyrroloindoIe 5 which readily underwent air oxidation to give 5-hydroxy-N’-formylkynurenine 6a.