Oxidative dealkylation of tertiary amines by iron(III) porphyrin-iodosoxylene system as a model of cytochrome P-450.
作者:NAOKI MIYATA、HIROKO KIUCHI、MASAAKI HIROBE
DOI:10.1248/cpb.29.1489
日期:——
The oxidative dealkylation of several tertiary amines with 2-iodoso-m-xylene catalyzed by chloro-α, β, γ, δ-tetraphenylporphinatoiron (III) (Fe (III) TPPCl, 3) was examined. N, N-Dimethylaniline (2) was smoothly dealkylated to N-methylaniline (4) in mild conditions and 3 was ascertained to act as an effective catalyst in this system. N, N-Diethylaniline and N, N-dimethylbenzylamine were similarly dealkylated. When the oxidation of 2 was carried out in the presence of methanol, N-methoxymethyl-N-methylaniline was predominantly formed and the formation of 4 was suppressed. This result suggests that the reactive cationic species, iminium ion, is formed in this reaction. The possible mechanism of this biomimetic dealkylation is also discussed.
研究了氯-α、β、γ、δ-四苯基卟吩铁(III)(Fe (III) TPPCl, 3)催化的 2-碘间二甲苯对几种叔胺的氧化脱烷基反应。N,N-二甲基苯胺(2)在温和的条件下顺利脱烷基化为 N-甲基苯胺(4),并确定 3 在该体系中是一种有效的催化剂。N,N-二乙基苯胺和 N,N-二甲基苄胺也同样被脱烷基化。当 2 在甲醇存在下进行氧化时,主要生成 N-甲氧基甲基-N-甲基苯胺,而 4 的生成受到抑制。这一结果表明,在这一反应中形成了活性阳离子物种--亚胺离子。此外,还讨论了这种仿生物脱烷基反应的可能机理。