Mechanistic aspects of oxidation of<i>N</i>-substituted 5<i>H</i>-dibenz[<i>c,e</i>]azepines by aldehyde oxidase
作者:H. Greg Thomas、Peter C. Ruenitz
DOI:10.1002/jhet.5570210427
日期:1984.7
selectivity by the enzyme for the respective imine and iminium functional groups in these compounds. The rate of oxidation of 3 decreased with increasing pH while the extent of “hydration” of this substrate increased over a similar pH range, signifying a preference by the enzyme for 3 over its carbinolamine equilibrium partner. Experiments with deuterium labelled analogues of 2 and 3 indicated that azomethine
制备了5 H-二苯并[ c,e ]氮杂(2)及其N-乙基和N-(2-乙氧基乙基)类似物3和4,并作为醛氧化酶的底物进行了评估。季铵化2与乙基碘布置3,而4通过的氢化铝锂还原制备ñ - (2-乙氧基)ethyldiphenimide然后将所得胺的乙酸汞氧化6。2和3的氧化速率相似,表明该酶对这些化合物中各自的亚胺和亚胺基官能团缺乏选择性。3的氧化速率随p H的增加而降低,而该底物的“水合”程度在相似的p H范围内增加,表明该酶比3的甲醇胺平衡伴侣更偏爱3。用氘标记的类似物2和3进行的实验表明,在酶促氧化过程中从这些底物上除去甲亚胺氢的速率不是决定速率的。因此5 H -dibenz [ c,e ] azepine-5,5,7-d 3(7)由氘化二苯酰亚胺(5)的氘化锂铝制备的)及其N-乙基类似物8的酶氧化速率与未氘代的相应酶氧化速率没有差异。