Selective γ-hydrogen atom abstraction in reactions of N-acetylamino acids and N-alkylacetamides with titanous ion and hydrogen peroxide
作者:Vicky A Burgess、Christopher J Easton
DOI:10.1016/s0040-4039(00)96198-7
日期:1987.1
Whereas reactions of N-acetylglycine, N-acetylalanine, and pyroglutamic acid, with TiCl3/H2O2 in a flow system give e.p.r. spectra arising from the corresponding α-centred radicals (–), reactions of N-acetylvaline, 2-acetamido-butyric acid, N-propylacetamide, and N-(2-methylpropyl)-acetamide, give spectra arising from the respective γ-centred radicals (–). Production of the γ-centred radicals (–) is
在流动系统中,N-乙酰甘氨酸,N-乙酰丙氨酸和焦谷氨酸与TiCl 3 / H 2 O 2的反应给出了由相应的α-中心自由基(– )产生的epr光谱,而N-乙酰缬氨酸,2-乙酰胺基丁酸,N-丙基乙酰胺和N-(2-甲基丙基)-乙酰胺,给出了相应的以γ为中心的自由基(- )产生的光谱。产生以γ为中心的自由基(- )的原因是钛与底物的酰胺基络合。