pH值低于约 8.5,将4a-羟基-5-乙基-3-甲基-荧光黄素(2)转化为螺(咪唑-4,2-喹喔啉)(3),但在pH 8.5–10.5之间,产物为1,6, 7-三甲基-4-乙基喹喔啉-2,3-二酮(4)伴随少量(3);在强碱性条件下,产物(4)伴有痕量的暂时鉴定为咪唑并[4,5- b ]喹喔啉酮(6)的物质;从(2)的水解的pH依赖性出发,对于4a-羟基质子的解离动力学p K app= 9.9。
Monooxygen donation potential of 4a-hydroperoxyflavins as compared with those of a percarboxylic acid and other hydroperoxides. Monooxygen donation to olefin, tertiary amine, alkyl sulfide, and iodide ion
作者:Thomas C. Bruice、J. Barry Noar、Sheldon S. Ball、U. V. Venkataram
DOI:10.1021/ja00346a057
日期:1983.4
Reactions of 4a-peroxides and 4a-pseudobases of N10- and N5-phenethylflavins
作者:Masaki Iwata、Thomas C. Bruice、H. L. Carrell、Jenny P. Glusker