A atom-efficient cross-coupling reaction of aryl iodides with triarylbismuths catalyzed by immobilization of palladium(II)-Schiff base complex in MCM-41

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• 作者：Caifeng Xu ; Lin Yin ; Bin Huang ; Haiyi Liu ; Mingzhong Cai ; ^{mzcai@jxnu.edu.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Cross-coupling ; Supported palladium catalyst ; Triarylbismuth ; MCM-41 ; Heterogeneous catalysis
• 刊名：Tetrahedron
• 出版年：2016
• 出版时间：28 April 2016
• 年：2016
• 卷：72
• 期：17
• 页码：2065-2071
• 全文大小：577 K

文摘

The first phosphine-free heterogeneous atom-efficient cross-coupling of aryl iodides with triarylbismuths was achieved in NMP using K₂CO₃ as base at 110 °C in the presence of 2 mol % of an MCM-41-immobilized palladium(II)-Schiff base complex [MCM-41-N,N-Pd(OAc)₂], yielding a variety of unsymmetrical biaryls in good to excellent yields. This new heterogeneous palladium catalyst exhibits high catalytic activity and can be recovered by a simple filtration of the reaction solution and recycled for at least 10 consecutive trials without any decreases in activity. Our system not only avoids the use of phosphine ligands, but also solves the basic problem of palladium catalyst recovery and reuse.