Spirodihydantoin Is a Minor Product of 5-Hydroxyisourate in Urate Oxidation
作者:Hongbin Yu、Jacquin C. Niles、John S. Wishnok、Steven R. Tannenbaum
DOI:10.1021/ol048547w
日期:2004.9.1
Spirodihydantoin is a minor product from oxidation of uric acid (similar to0.15% yield), while spiroiminodihydantoin is a major product from oxidation of 8-oxo-7,8-dihydroguanine (37% yield, pH 10.2). High pH and temperature favor the formation of both spiro compounds. O-18 labeling experiments and in situ generation and decomposition of 5-hydroxy-N7-methylisouric acid indicate that spirodihydantoin and allantoin and spiroiminodihydantoin and guanidinohydantoin are products of 5-hydroxyisourate and 5-hydroxy-8-oxo-7,8-dihydroguanine intermediates, respectively.
Oxidation of uric acid. 1. Structural revision of uric acid glycols