The oxidation of 2-alkoxy-3,6-di-tert-butylphenols.: The reversible dimerization of 2-alkoxy-3,6-di-tert-butylphenoxy radicals

被引：18

作者：

Abakumov, GA ^{[1
]}

Cherkasov, VK ^{[1
]}

Nevodchikov, VI ^{[1
]}

Druzhkov, NO ^{[1
]}

Fukin, GK ^{[1
]}

Kursky, YA ^{[1
]}

Piskunov, AV ^{[1
]}

机构：

[1] GA Razuvaev Inst Organomet Chem, Nizhnii Novgorod 603950, Russia

来源：

TETRAHEDRON LETTERS | 2005年 / 46卷 / 23期

基金：

俄罗斯基础研究基金会;

关键词：

phenol; oxidation; phenoxy radical; reversible dissociation;

D O I：

10.1016/j.tetlet.2005.04.012

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The oxidation of 2-alkoxy-3,6-di-tert-butylphenols has been studied. It was found that 2-RO-3,6-di-tert-butylphenoxy radicals (R = Et, Pr, Ph) undergo dimerization by C-O coupling. The X-ray structure of 2-ethoxy-3,6-di-tert-butylphenoxy dimer has been determined. Radical dimers dissociate reversibly in solution to give two phenoxy radicals at 200-350 K. By using EPR spectroscopy the equilibrium concentration of the phenoxy radicals, equilibrium constants and AH and AS of dissociation have been determined. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：4095 / 4097

页数：3

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