2972-84-1Relevant academic research and scientific papers
A Dynamic Three-Dimensional Covalent Organic Framework
Ma, Yun-Xiang,Li, Zhi-Jun,Wei, Lei,Ding, San-Yuan,Zhang, Yue-Biao,Wang, Wei
, p. 4995 - 4998 (2017)
A guest-induced reversible crystal-structure transformation is identified in a new 3D covalent organic framework (COF) by comprehensive analyses using powder X-ray diffraction, organic vapor sorption isotherm, and 129Xe NMR spectroscopy. The revolving imine bond in interpenetrating 3D networks is uncovered as the key to the dynamic behavior, the potential applications of which are illustrated by gas separation and heterogeneous catalysis, thus paving the way to the design of stimuli-responsive and multifunctional COF materials.
Two Cu(II) coordination polymers: Heterogeneous catalytic Knoevenagel condensation reaction and treatment activity on atherosclerosis via regulating the expression of the COX-2 in vascular endothelial cells
Zhao, Yong-Chang,Zhang, Yan,Jiang, De-Ying,Wang, Liang,Sun, Ping
, (2021)
By altering auxiliary nitrogen-donor ligands, two novel coordination polymers (CPs) containing Cu(II) formulated as [Cu2.5(L)(trz)2(H2O)2]·2H2O (1) (Htrz = 1,2,4-triazole and H3L = 5-(4-car
A Stable Y(III)-Based Amide-Functionalized Metal-Organic Framework for Propane/Methane Separation and Knoevenagel Condensation
Qiao, Junyi,Zhang, Borong,Yu, Xueyue,Zou, Xiaoqin,Liu, Xinyao,Zhang, Lirong,Liu, Yunling
supporting information, p. 3708 - 3715 (2022/02/25)
Here, a Y(III)-based metal-organic framework, JLU-MOF112 {[Y3(μ3-O)2(μ3-OH)(H2O)2(BTCTBA)2]·2[(CH3)2NH2]·5DMF·C6H5Cl·4H2O}, has been successfully synthesized under solvothermal conditions. JLU-MOF112 was constructed with amide-functionalized tricarboxylate ligands and Y(III)-based infinite chains, where the Y3 repeating units are arranged in a trans order. The overall framework could be viewed as a novel (3,5)-connected net with two types of channels along the [100] and [010] directions. JLU-MOF112 possesses a large BET surface area (1553 m2 g-1), a permanent pore volume (0.67 cm3 g-1), and outstanding thermal and chemical stability, which give JLU-MOF112 potential for the purification of natural gas, especially the equimolar separation of C3H8/CH4 with a high selectivity of 176. In addition, benefiting from the amide functional groups as Br?nsted basic sites and the exposure of open metal sites as Lewis acid sites after activation, JLU-MOF112 can serve as a high-efficiency heterogeneous catalyst for Knoevenagel condensation by the reactions of malononitrile with benzaldehyde (yield of 98%, turnover number of 392, and turnover frequency of 3.27 min-1) and diverse aldehyde compounds. A rational mechanism was put forward that the Knoevenagel condensation was catalyzed by the synergistic effect of the Lewis acid sites and Br?nsted basic sites, engendering the polarization of the carbonyl groups and the deprotonation of the methylene groups for nucleophilic attack.
Flexible thiourea linked covalent organic frameworks
Ai, Wenying,Hu, Fujia,Li, Chunzhi,Ma, Baiwei,Mi, Liwei,Qiao, Huijie,Wang, Zhuo,Xu, Yimeng,Zhai, Lipeng,Zhang, Lin
, p. 7576 - 7580 (2021/11/17)
Exploring covalent organic frameworks with new linkages is regarded as an efficient method to modulate the corresponding properties, and a new linkage is essential to the progress of this field. Herein, condensation of 1,3,5-triformylphloroglucinol with 1,1′-(1,4-phenylene)bis(thiourea), 1,1′-(2,5-dimethyl-1,4-phenylene)bis(thiourea) or 1,1′-(3,3′-dimethyl-[1,1′-biphenyl]-4,4′-diyl)bis(thiourea) were applied to construct COFs with thiourea linkages for the first time.
Development of an efficient, one-pot, multicomponent protocol for synthesis of 8-hydroxy-4-phenyl-1,2-dihydroquinoline derivatives
Tabassum, Rukhsana,Ashfaq, Muhammad,Oku, Hiroyuki
, p. 534 - 547 (2020/12/04)
A one-pot quick and efficient multicomponent reaction has been developed for the synthesis of a new series of functionalized 8-hydroxy-4-phenyl-1,2-dihydroquinoline derivatives using 30 mol% ammonium acetate in ethanol as solvent. This economical protocol
Three Resorcin[4]arene-Based Two-Dimensional Zn(II) Supramolecular Isomers Synthesized via a Structure-Directing Strategy for Knoevenagel Condensation
Wang, Fei-Fei,Liu, Ying-Ying,Pei, Wen-Yuan,Ma, Jian-Fang
supporting information, p. 7329 - 7336 (2021/05/29)
Herein, in the presence of three structure-directing agents (SDAs), a family of imidazole-functionalized resorcin[4]arene-based coordination polymers (CPs), [Zn(TIC4R)(HCOO)]·HCOO·0.5DMF·1.5H2O (1), [Zn(TIC4R)(CN)]·HCOO·DMF·2.5H2O (2), and [Zn(TIC4R)(H2O)
Two new calix[4]resorcinarene-based coordination cages adjusted by metal ions for the Knoevenagel condensation reaction
Lu, Bing-Bing,Ma, Jian-Fang,Pei, Wen-Yuan,Wang, Tianqi,Yang, Jin
supporting information, p. 9942 - 9948 (2021/07/28)
Two new calix[4]resorcinarene-based coordination cages, namely, [Zn4(TPC4R)(PDC)4]·2DMF·6H2O (1-Zn) and [In11(TPC4R)2(PDC)16(μ2-OH)2(H2O)2]·[(CH
Phosphine-Catalyzed (4 + 2) Annulation of δ-Sulfonamido-Substituted Enones with 1,1-Dicyanoalkenes: Synthesis of Piperidine Derivatives
Liu, Min,Zhou, Leijie,Shi, Wangyu,Hu, Yimin,Liao, Jianning,Duan, Zeqing,Wang, Wei,Wu, Yongjun,Zheng, Bing,Guo, Hongchao
supporting information, p. 7703 - 7707 (2021/10/20)
The δ-sulfonamido-substituted enones were employed as phosphine acceptor in phosphine-catalyzed (4 + 2) annulation of 1,1-dicyanoalkenes. They served as a four-membered synthon to react with 1,1-dicyanoalkenes under mild reaction conditions, producing pip
Discrete coordination molecule container and preparation method and small molecule catalysis application thereof
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Paragraph 0055-0057, (2020/04/02)
The invention relates to a discrete coordination molecule container and a preparation method and application thereof. The structure of the discrete coordination molecule container is [M4 (mu4-B) (X)]6Y6Z2, wherein M is a metal element; b is H2O (water); X is a thiacalix [4] arene ligand; Y is an asymmetric tricarboxylic acid ligand; and Z is a symmetric tricarboxylic acid ligand. The discrete coordination molecule container provided by the invention is provided with a functionally modified inner cavity, a specific nano inner cavity structure realizes enrichment of an organic reaction substrate and enhances contact with catalytic active sites, and meanwhile, an acidic active center of mu4-H2O and an alkaline active center of imino form an acid-base dual catalytic active center. The discrete coordination molecular container provided by the invention is used for homogeneous catalysis of Knoevenagel condensation reaction, and has efficient catalytic activity.
Amides as surrogates of aldehydes for C-C bond formation: amide-based direct Knoevenagel-type condensation reaction and related reactions
Ou, Wei,Huang, Pei-Qiang
, p. 11 - 15 (2019/11/11)
Aldehydes are perhaps the most versatile compounds that enable many C-C bond forming reactions, which are not amenable for other subclasses of carbonyl compounds. We report the first use of amides as surrogates of aldehydes for C-C bond formation, namely,
