Trapping of metabolically generated electrophilic species with cyanide ion: metabolism of methapyrilene
作者:R. Ziegler、Bert Ho、N. Castagnoli
DOI:10.1021/jm00142a004
日期:1981.10
(dimethylamino)ethyl side chain nitrogen and carbon atoms of methapyrilene is presented. Attempts to trap iminium ion intermediates with electrophilic alkylating potential by coincubating methapyrilene with sodium cyanide have led to the isolation of N-(cyanomethyl)normethapyrilene. The possibility of characterizing the iminium ion intermediate that would result from the oxidative deamination of the dimethylamino moiety
最近,流行的抗组胺甲萘丙啶[N,N-二甲基-N'-(2-吡啶基)-N'-(2-噻吩甲基)-1,2-乙二胺]已被证明是有效的肝癌原。用兔子肝脏100000g微粒体制剂进行的代谢研究已部分表征了甲萘丙啶的体外代谢特征。提出了N-氧化物和三种可能的甲醇胺形成的证据,这些胺是由NADPH依赖的甲萘丙啶的(二甲基氨基)乙基侧链氮和碳原子氧化而成的。尝试通过将氰丙基丙啶与氰化钠共孵育来捕获具有亲电烷基化电位的亚胺离子中间体,已导致分离出N-(氰基甲基)去甲吡咯啉。相应的α-氰胺的化学不稳定性排除了表征因二甲基氨基部分的氧化脱氨而产生的亚胺离子中间体的可能性,该酰胺会自发地进行逆迈克尔反应并水解为相应的酰胺。根据甲萘丙啶对潜在烷基化物质的代谢活化来讨论结果。