Air-stable Pd(II) catalysts with cryptand-22 ligand for convenient and efficient Suzuki cross-coupling reactions

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• 作者：Ming-Hui Hsu ; Chien-Ming Hsu ; Ju-Chun Wang ; Chia-Hsing Sun
• 关键词：Metallic surface ; Copper ; Adsorption ; Organic molecule ; Dioxins ; Density functional theory
• 刊名：Tetrahedron
• 出版年：2008
• 期刊代码：107_00404020
• 类别：ch
• 出版时间：5 May 2008
• 卷：64
• 期：19
• 页码：4268-4274
• 文件大小：1229 K

摘要

Air-stable Pd(II) catalysts with cryptand-22 ligand was easily handled in atm air at room temperature for Suzuki cross-coupling reactions of aryl bromides with arylboronic acids both containing electron-withdrawing and electron-donating groups. Generally, reactions proceeded fast to completion in 2 h to give high product yields. Our Pd(OAc)₂/cryptand-22 catalyst is unique, since the reaction solution remained yellow during reaction period and air-stable without formation of Pd black as usually observed for ordinary simple amine ligands.