On the role of singlet oxygen in the self-sensitized photo-oxygenation of bilirubin and its pyrromethenone models
作者:G.L. Landen、Y.-T. Park、D.A. Lightner
DOI:10.1016/s0040-4020(01)88703-2
日期:1983.1
undergo self-sensitized photo-oxygenation, as does bilirubin. The reaction products of 1 consist of methylethylmaleimide, kryptopyrrole aldehyde and its photo-oxygenation product and oxygenated dipyrroles. The same products are formed from 2, except xeronimide is found instead of methylethyl-maleimide. Kinetic studies indicate that singlet oxygen is not necessarily involved in the photo-oxygenation
4-乙基-3-甲基-5-(4-乙基-3,5-二甲基吡咯基-2-亚甲基)-3-吡咯啉-2-酮(1),3,4-二乙基-5-(4-乙基- 3,5-二甲基吡咯基-2-亚甲基)-3-吡咯啉-2-酮(2)和黄胆红素酸(XBR)与胆红素一样经历自敏化的光氧合。1的反应产物由甲基乙基马来酰亚胺,k吡咯醛及其光氧化产物和氧化的二吡咯组成。由2形成相同的产物,不同之处在于找到了二氧酰亚胺,而不是甲基乙基-马来酰亚胺。动力学研究表明,单重态氧不一定参与光氧合反应。1和2的几何光异构化(Z →2 E),并且XBR的发展速度甚至比光敏化的氧合作用更快。