Electron spin resonance studies. Part 64. The hydroxyl radical-induced decarboxylation of methionine and some related compounds
作者:Michael J. Davies、Bruce C. Gilbert、Richard O. C. Norman
DOI:10.1039/p29830000731
日期:——
from the TiIII–H2O2 couple in a flow system) and ButNO (in conjunction with the photolytic decomposition of H2O2) confirm that reaction of ·OH with methionine, S-methylcysteine, and some related compounds effects oxidative decarboxylation. It is proposed that the reaction proceeds via the sequential formation of an hydroxyl adduct at sulphur, a sulphur-centred radical-cation, and a (cyclic) sulphuranyl
使用MeNO 2(与流系统中的Ti III -H 2 O 2对产生·OH结合)和Bu t NO(与H 2 O 2的光分解结合)进行的自旋捕集esr实验证实·OH与蛋氨酸,S-甲基半胱氨酸及一些相关化合物的反应会影响氧化脱羧。提出该反应通过在硫上依次形成羟基加成物,以硫为中心的自由基阳离子和其中羧酸盐功能键合到硫上的(环状)硫磺基自由基来进行。