NCN pincer palladium complexes based on 1,3-dipicolyl-3,4,5,6-tetrahydropyrimidin-2-ylidenes: synthesis, characterization and catalytic activities

Liangru Yang; Xinchi Zhang; Pu Mao; Yongmei Xiao; Huanyu Bian; Jinwei Yuan; Wenpeng Mai; Lingbo Qu

doi:10.1039/C5RA01706H

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NCN pincer palladium complexes based on 1,3-dipicolyl-3,4,5,6-tetrahydropyrimidin-2-ylidenes: synthesis, characterization and catalytic activities†

Liangru Yang,*^a Xinchi Zhang,^a Pu Mao,*^a Yongmei Xiao,^a Huanyu Bian,^a Jinwei Yuan,^a Wenpeng Mai^a and Lingbo Qu^a

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* Corresponding authors

^a School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, P. R. China
E-mail: lryang@haut.edu.cn, pumao@haut.edu.cn

Abstract

The synthesis of novel pincer palladium complexes containing ring expanded six-membered N-heterocyclic carbenes (NHCs) via direct metallation of the precursors tetrahydropyrimidin-1-ium hexafluorophosphates in the presence of NaN(SiMe₃)₂ is presented. The structure has been characterized unambiguously by X-ray single crystal analysis. Catalytic activity investigation showed that the complexes catalyzed the Heck reaction of aryl bromides with acrylate/styrene efficiently when using Et₃N as base and DMA as solvent.

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DOI: https://doi.org/10.1039/C5RA01706H
Article type: Paper
Submitted: 28 Jan 2015
Accepted: 05 Mar 2015
First published: 05 Mar 2015

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RSC Adv., 2015,5, 25723-25729

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NCN pincer palladium complexes based on 1,3-dipicolyl-3,4,5,6-tetrahydropyrimidin-2-ylidenes: synthesis, characterization and catalytic activities

L. Yang, X. Zhang, P. Mao, Y. Xiao, H. Bian, J. Yuan, W. Mai and L. Qu, RSC Adv., 2015, 5, 25723 DOI: 10.1039/C5RA01706H

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NCN pincer palladium complexes based on 1,3-dipicolyl-3,4,5,6-tetrahydropyrimidin-2-ylidenes: synthesis, characterization and catalytic activities†

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NCN pincer palladium complexes based on 1,3-dipicolyl-3,4,5,6-tetrahydropyrimidin-2-ylidenes: synthesis, characterization and catalytic activities

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