Novel bipyridinyl oxadiazole-based metal coordination complexes: High efficient and green synthesis of 3,4-dihydropyrimidin-2(1H)-ones through the Biginelli reactions
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- 作者：Jin-Hua Wanga ; E. Zhanga ; Gui-Mei Tanga ; meiguit@163.com" class="auth_mail" title="E-mail the corresponding author ; Yong-Tao Wanga ; ceswyt@qlu.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Yue-Zhi Cuia ; Seik Weng Ngb
- 关键词：Metal coordination complexes ; Biginelli reaction ; 3 ; 4-dihydropyrimidin-2(1H)-ones ; Three-component reaction ; Catalysis
- 刊名：Journal of Solid State Chemistry
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：241
- 期：Complete
- 页码：86-98
- 全文大小：5839 K
文摘
Three new metal coordination complexes, namely, [Co(BPO)2(H2O)4](BS)2(H2O)2 (1), [Co(BPO)2(H2O)4](ABS)2(H2O)2 (2), [Co(BPO)2(H2O)4](MBS)2(H2O)2 (3) [BPO=2,5-di(pyridin-4-yl)-1,3,4-oxadiazole, BS=benzenesulphonate, ABS=4-aminobenzenesulphonate, MBS=4-methylbenzenesulphonate] were obtained under hydrothermal conditions. Complexes 1–3 were structurally characterized by single-crystal X-ray diffraction, powder X-ray diffraction, IR and thermogravimetric analyses (TGA). All of them display a zero-dimensional motif, in which strong intermolecular hydrogen bonding interactions (O–H···O/N) and packing interactions (C–H···π and π···π) make them achieve a three-dimensional supramolecular architecture. The primary catalytic results of these three complexes show that high efficiency for the green synthesis of a variety of 3,4-dihydropyrimidin-2(1H)-ones was observed under solvent free conditions through Biginelli reactions. The present catalytic protocols exhibit advantages such as excellent yield, easy isolation, eco-friendly conditions, and short reaction time.