1. On the Mechanism of Oxidation. VII. Preceding paper in this series: Ber. dtsch. chem. Ges.85, 3.H. Wieland, Festschrift (1952).
2. Cf. Paper V in this series: Exper.8, 36 (1952).
3. E. Friedmann, Beitr. chem. Physiol. Pathol.11, 304 (1908).
4. In 1901,E. Mayer [Dtsch. Arch. Klin. Med.70, 443 (1901)] called attention to the similarity of the reaction tyrosine → homogentisic acid to the rearrangement of p-tolylhydroxylamine to toluhydroquinone [E. Bamberger, Ber. dtsch. chem. Ges.28, 245 (1895)], at a time when the isolation of the intermediate quinol had not been reported yet byBamberger [Ber. dtsch. chem. Ges.33, 3600 (1901)].
5. E. Bamberger, Ber. dtsch. chem. Ges.36, 2028 (1903).