Catalytic Hypervalent Iodine Oxidation Using 4-Iodophenoxyacetic Acid and Oxone®: Oxidation of p-Alkoxyphenols to p-Benzoquinones

被引:35
|
作者
Yakura, Takayuki [1 ]
Tian, Yuan [1 ]
Yamauchi, Yu [1 ]
Omoto, Masanori [1 ]
Konishi, Tatsuya [1 ]
机构
[1] Toyama Univ, Grad Sch Med & Pharmaceut Sci, Toyama 9300194, Japan
关键词
hypervalent iodine; 4-iodophenoxyacetic acid; Oxone (R); p-alkoxyphenol; p-benzoquinone; M-CHLOROPERBENZOIC ACID; POLYMER-SUPPORTED IBX; IN-SITU GENERATION; TOLUENESULFONIC ACID; ALPHA-TOSYLOXYKETONES; EFFICIENT SYNTHESIS; ORGANIC-SYNTHESIS; OXIDIZING SYSTEM; RECENT PROGRESS; QUINONES;
D O I
10.1248/cpb.57.252
中图分类号
R914 [药物化学];
学科分类号
100701 ;
摘要
A catalytic hypervalent iodine oxidation of p-alkoxyphenols using 4-iodophenoxyacetic acid (1a) and Oxone (R) was developed. Reaction of p-alkoxyphenol (2) with a catalytic amount of la in the presence of Oxone (R) as a co-oxidant in 2,2,2-trifluoroethanol-water (1 : 2) gave the corresponding p-qui none (3) in excellent yield without special operation. The substituent effect on iodobenzene ring in the oxidation was observed; p-alkoxy is the most effective, with the series following the approximate order p-RO>p-Me. o-MeO, m-MeO>H>o-CO2H. And remarkable solvent effects were observed.
引用
收藏
页码:252 / 256
页数:5
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