The functionalization of saturated hydrocarbons. Part 34. A study on the mechanism of tempo trapping in GIF-type systems
作者:Derek H.R. Barton、Béatrice M. Chabot、Bin Hu
DOI:10.1016/0040-4020(96)00565-0
日期:1996.7
produces alkyl-Tempo in very good yield. Good results are also obtained with FeII-H2O2 system (pyridine, Picolinic Acid, hydrocarbon). In this case the FeII-FeIV manifold is responsible for the formation of the adduct. Using FeIII-H2O2, Tempo adduct is formed at the same rate as the oxidation products. Mechanistic studies suggest the oxidation of Tempo by the FeV to give an oxoamonium salt and an FeIV species
在Tempo存在下,Barton PTOC酯的光解作用(自由基反应)可以非常好地产生烷基Tempo。Fe II -H 2 O 2体系(吡啶,吡啶甲酸,烃)也获得了良好的结果。在这种情况下,Fe II -Fe IV歧管负责形成加合物。使用Fe III -H 2 O 2,以与氧化产物相同的速率形成Tempo加合物。机理研究表明,Fe V将Tempo氧化,生成氧代铵盐和Fe IV物种。