Fragmentations observed in the reactions of α-methoxy-γ-alkoxyalkyl iodide substrates with super-electron-donors derived from 4-DMAP and N-methylbenzimidazole
作者:Ryan Sword、Luke A. Baldwin、John A. Murphy
DOI:10.1039/c0ob01282c
日期:——
super-electron-donors (SEDs) derived from 4-dimethylaminopyridine and from N-methylbenzimidazole with α-methoxy-γ-alkoxyalkyl iodides lead to liberation of the γ-alkoxy groups as their alcohols. This is consistent with generation of alkyl radicals from the alkyl halide precursors, and trapping of these radicals by the radical-cation of the SED, followed by a heterolytic fragmentation.
衍生自的超电子给体(SED)的反应 4-二甲基氨基吡啶 和从 N-甲基苯并咪唑与α-甲氧基-γ-烷氧基烷基碘一起使用会导致γ-烷氧基作为其醇的释放。这与从烷基卤化物前体产生烷基自由基,以及通过SED的自由基阳离子捕获这些自由基,然后进行杂化裂解相一致。