Deuterium-labeling studies establishing stereochemistry at the oxypalladation step in Wacker-type oxidative cyclization of an o-allylphenol

被引：108

作者：

Hayashi, T ^{[1
]}

Yamasaki, K ^{[1
]}

Mimura, M ^{[1
]}

Uozumi, Y ^{[1
]}

机构：

[1] Kyoto Univ, Grad Sch Sci, Dept Chem, Kyoto 6068502, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2004年 / 126卷 / 10期

关键词：

D O I：

10.1021/ja031946m

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The stereochemical pathway (syn or anti) of the oxypalladation step was studied in the palladium(II)-catalyzed Wacker-type cyclization of stereospecifically deuterated 6-(2-hydroxyphenyl)-3-deuteriocyclohexenes, cis-3-d-1 and trans-3-d-1, giving dihydrobenzofuran derivatives. The stereochemistry was determined to be syn in the reaction catalyzed by a dicationic palladium(II) catalyst generated from Pd(MeCN)4(BF4)2 and (S,S)-ip-boxax in the presence of benzoquinone in methanol, while it is mainly anti in the reaction catalyzed by PdCl2(MeCN)2 in the presence of a chloride ion. Copyright © 2004 American Chemical Society.

引用

页码：3036 / 3037

页数：2

共 31 条

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