title: A series of phenyl sulfonate metal coordination polymers as catalysts for one-pot Biginelli reactions under solvent-free conditions.
abstract: Three new metal coordination polymers, namely, [Co(DPP)2(H2O)2]·(BS)2·2H2O (1), [Co(DPP)2(H2O)2]·(ABS)2·2H2O (2) and [Co(DPP)2(MBS)2] (3) [DPP = 1,3-di(pyridin-4-yl)propane, BS = phenyl sulfonic acid, ABS = p-aminobenzene sulfonic acid, MBS = p-methylbenzene sulfonic acid] were obtained under hydrothermal conditions. Complexes 1-3 were structurally characterized using X-ray single-crystal diffraction, XRD and IR spectroscopy. Both complexes 1 and 2 display a 1D tape structure. Meanwhile, complex 3 exhibits a 2D layer and further stacks via C-Hπ interactions to generate a three-dimensional supramolecular architecture. These three metal coordination polymers have been applied as catalysts for the green synthesis of a variety of 3,4-dihydropyrimidin-2(1H)-ones under solvent-free conditions through the Biginelli reaction. Interestingly, the catalysis products have been obtained in high yields under eco-friendly synthesis conditions.
authors.affiliation: Department of Chemical Engineering, Shandong Provincial Key Laboratory of Fine Chemicals, Qilu University of Technology, Jinan, 250353, China. ceswyt@qlu.edu.cn meiguit@163.com.
authors.forename: Jin-Hua
authors.initials: JH
authors.lastname: Wang
authors.forename: Gui-Mei
authors.initials: GM
authors.lastname: Tang
authors.forename: Yong-Tao
authors.initials: YT
authors.lastname: Wang
authors.forename: Yue-Zhi
authors.initials: YZ
authors.lastname: Cui
authors.forename: Jun-Jie
authors.initials: JJ
authors.lastname: Wang
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng
mesh_terms: D002384:Catalysis; D056831:Coordination Complexes / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D011108:Polymers / Q000737:chemistry*; D013451:Sulfonic Acids / Q000737:chemistry*; D013696:Temperature
chemical_list: D056831:Coordination Complexes; D011108:Polymers; D013451:Sulfonic Acids