Synthesis, characterization and X-ray structures of N-heterocyclic carbene palladium complexes based on calix[4]arenes: highly efficient catalysts towards Suzuki-Miyaura cross-coupling reactions

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• 作者：Hui Ren^a ; Yong Xu^b ; Erwann Jeanneau^a ; Isabelle Bonnamour^a ; ; Tao Tu^b ; ; Ulrich Darbost^a ; ^{Ulrich.darbost@univ-lyon1.fr" class="auth_mail}
• 关键词：Calix[4]arene ; N-Heterocyclic carbene ; Palladium complex ; Catalysis ; Suzuki&ndash ; Miyaura cross-coupling
• 刊名：Tetrahedron
• 出版年：29 April, 2014
• 年：2014
• 卷：70
• 期：17
• 页码：2829-2837
• 全文大小：904 K

文摘

A new series of calix[4]arene supported N-heterocyclic carbene palladium complexes were developed and fully characterized. A mono-substituted calix[4]arene was prepared through conventional procedures, following with the attachment of imidazolyl derivative groups to compose the precursors of novel NHCs ligands. Undergoing the alkylation with n-butylbromide and corresponding metallation with palladium and pyridine, original complexes were obtained. After a full characterization in solution and solid state, the evaluation of catalytic activity was taken out in Suzuki-Miyaura cross-coupling reactions, which revealed good performances.