Citation: Yu JING, Xia-Mei ZHANG, Yan-Feng CUI, Da-Wei LI, Hao SUN, Yu GE, Ya-Hong LI. Two Copper Complexes Based on Derivatives ofImidazo[1, 5-a]pyridine: Syntheses, Structures, and Catalytic Properties[J]. Chinese Journal of Structural Chemistry, ;2020, 39(6): 1057-1062. doi: 10.14102/j.cnki.0254-5861.2011-2549 shu

Two Copper Complexes Based on Derivatives ofImidazo[1, 5-a]pyridine: Syntheses, Structures, and Catalytic Properties

College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China

Corresponding author: Ya-Hong LI, liyahong@suda.edu.cn
Received Date: 26 July 2019
Accepted Date: 19 January 2020

Fund Project: the National Natural Science Foundation of China 21772140Natural Science Foundation of Jiangsu Province BK20171213

Figures(3)

The syntheses, crystal structures and catalytic activities of two copper complexes are reported. Reaction of CuCl, 3-(pyridin-2-yl)imidazo[1, 5-a]pyridine and pyridine-4-formaldehyde under solvothermal conditions gave [Cu₄(L1)₂Cl₂][CuCl₂]₂ (1, L1 = 1, 1΄-(pyridin-4-ylmethylene)bis(3-(pyridin-2-yl)imidazo[1, 5-a]pyridine). The ligand L1 was generated in situ from the reaction of 3-(pyridin-2-yl)imidazo[1, 5-a]pyridine and pyridine-4-formaldhyde. The tetranuclear [Cu₄(L1)₂Cl₂]²⁺ moiety displays McClellan Saddle-like configuration. Reaction of Cu(BF₄)₂⋅6H₂O with 1, 1΄-(pyridin-4-ylmethylene)bis(3-(pyridin-2-yl)imidazo[1, 5-a]pyridine (L2) in glass tube generated [Cu(L2)(H₂O)₂]₂[BF₄]₂(SiF₆)⋅2H₂O (2). The structures of 1 and 2 were characterized by X-ray single-crystal diffraction analysis. The catalytic activities of 1 and 2 toward ketalization reactions were studied. They both exhibited high activities for the ketalization of aliphatic ketones by ethylene glycol.
- tetranuclear,
- saddle-like configuration,
- copper,
- catalysis
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