代谢
所研究的硝基芳烃与硫醇发生二级反应。与谷胱甘肽的反应速度随着取代基的哈姆特常数的增加而增加。通过增加硫醇的浓度,有利于不稳定中间体的硫解裂,但会以磺酰亚胺异构化为代价。降低pH有利于磺酰亚胺的异构化并减少苯基羟基胺的形成。红细胞中的谷胱甘肽浓度导致高铁血红蛋白血症的改变以及与负哈姆特常数的硝基芳烃的共价结合。胆汁和静脉渗出物中的谷胱甘肽二硫化物的排出显著增加。
THE NITROSOARENES STUDIED REACTED WITH THE THIOLS IN A 2ND-ORDER REACTION. THE REACTION VELOCITIES WITH GLUTATHIONE INCREASED WITH INCREASING HAMMET CONSTANT OF THE SUBSTITUENT. THIOLYTIC CLEAVAGE OF THE LABILE INTERMEDIATE WAS FAVORED BY INCREASING THE THIOL CONCENTRATION AT THE EXPENSE OF SULFINAMIDE ISOMERIZATION. LOWERING THE PH FAVORED SULFINAMIDE ISOMERIZATION AND DECREASED PHENYLHYDROXYLAMINE FORMATION. THE GLUTATHIONE CONCENTRATION IN THE RED BLOOD CELLS RESULTED IN THE ALTERATION OF FERRIHEMOGLOBINEMIA AND COVALENT BINDING OF NITROSOARENES WITH NEGATIVE HAMMET CONSTANTS. THE EFFLUX OF GLUTATHIONE DISULFIDE INCREASED MARKEDLY IN THE BILE AND VENOUS EFFUSATE.
来源:Hazardous Substances Data Bank (HSDB)