... Please enable JavaScript to use all the features on this page. Tetrahedron Letters. Volume 42, Issue 26, 25 June 2001, Pages 4329–4331. Cover image Cover image. ... 6 June 2001. Abstract. ... 14., , , and However, this reagent is best suited to small scale experiments. 15. In this letter, we report the synthesis of substituted quinoline-5,8-quinones in good yield, by photosensitized oxidation of readily available substituted 8-hydroxyquinolines of type 1 (Scheme 1). ...