PHENYLIODINE(III) BIS(TRIFLUOROACETATE) AS A RADICAL-CATION GENERATING REAGENT

被引:33
|
作者
EBERSON, L [1 ]
HARTSHORN, MP [1 ]
PERSSON, O [1 ]
机构
[1] UNIV CHRISTCHURCH,DEPT CHEM,CHRISTCHURCH,NEW ZEALAND
来源
ACTA CHEMICA SCANDINAVICA | 1995年 / 49卷 / 09期
关键词
D O I
10.3891/acta.chem.scand.49-0640
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The use of phenyliodine(III) bis(trifluoroacetate) (PIFA) as a one-electron oxidant For aromatic compounds has been explored. In trifluoroacetic acid or 1,1,1,3,3,3-hexafluoro-2-propanol, a number of radical cations were generated in the temperature range -10 to 20 degrees C and structurally assigned by EPR spectroscopy. The oxidative power of PIFA was found to be similar to that of thallium(III) trifluoroacetate under the conditions employed. Thus PIFA oxidation is a useful, less toxic complement to existing methods of radical cation generation. 1,1,1,3,3,3-Hexafluoro-2-propanol was found to be an excellent solvent for radical cations. The use of PIFA in 'inverted spin trapping' with alpha-phenyl-N-tert-butylnitrone (PEN) was investigated briefly, and it was found that it sustains this reaction with nucleophiles such as fluoride, chloride and acetate ion, tetramethylsuccinimide anion and benzotriazolate anion.
引用
收藏
页码:640 / 644
页数:5
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