283170-46-7Relevant academic research and scientific papers
A Bifunctional Cationic Covalent Organic Polymer for Cooperative Conversion of CO2 to Cyclic Carbonate without Co-catalyst
Zhang, Rui-Ying,Zhang, Yue,Tong, Jian,Liu, Lin,Han, Zheng-Bo
, p. 2833 - 2841 (2021)
Abstract: A cationic covalent organic polymer with bifunctional active site was synthesized, which was treated by N, N'-bis(5-bromomethylsalicylaldehyde)ethylenediamine (salen ligand) and tris(1H-imidazol-1-yl) triazine (TIT) in the presence of aluminum e
Azomethine-functionalized task-specific ionic liquid for diversion of toxic metal ions in the aqueous environment into pharmacological nominates
El-Sayed,Alkabli,Althumayri, Khalid,Elshaarawy, Reda F.M.,Ismail, Lamia A.
, (2021)
By this work, a new azomethine-supported task-specific ionic liquid (ABIIL) was fabricated based on bis-(butylimidazolium hexafluorophosphate) salicylidene Schiff base. The successful formation of ABIIL was confirmed form its microanalytical and spectral
Efficient Solvent-Free Synthesis of Cyclic Carbonates from the Cycloaddition of Carbon Dioxide and Epoxides Catalyzed by New Imidazolinium Functionalized Metal Complexes Under 0.1?MPa
Zhang, Qian,Yu, Peng,Lei, Bo,Yang, Hai-Jian,Hu, Juncheng,Wang, Lihua,Zhou, Tengfei,Jiang, Qingqing,Zhu, Junjiang,Han, Buxing
, p. 2537 - 2548 (2020/03/11)
Abstract: A series of imidazolinium functionalized metal complexes were prepared as efficient and recyclable homogeneous catalysts for the synthesis of cyclic carbonates via the coupling reaction of carbon dioxide and epoxides in the absence of co-catalysts and solvent. Due to the synergistic effect between the metal center as Lewis acid and the imidazolinium groups with halide anions as Lewis base, these catalysts exhibited excellent catalytic capability. Particularly, high turnover frequency (TOF) values of (1174, 1240 and 1262?h?1) for bifunctional catalysts (2c, 2i and 2j, respectively) were achieved via adjusting reaction parameters. These catalysts also showed excellent catalytic performances under atmospheric pressure. Recyclability test showed that this kind of bifunctional catalyst can be easily recovered and reused for at least five times without dramatic loss of activity and selectivity. The optimum reaction conditions were also screened as (120?°C, 1.0?MPa CO2 and 2?h). The catalyst could also be applied to a variety of substrates and be used for a long time with high catalytic activities. We also performed the Kinetic studies, which suggested that the activity of catalysts following the order I? > Br? > Cl?. Moreover, a plausible reaction mechanism by imidazolinium functionalized metal complexes was proposed. Graphic Abstract: [Figure not available: see fulltext.].
Regioselective synthesis of bromo-substituted 3-arylcoumarins
Matos, Maria Joao,Delogu, Giovanna,Podda, Gianni,Santana, Lourdes,Uriarte, Eugenio
experimental part, p. 2763 - 2766 (2010/10/04)
Regioselective syntheses of 3-arylcoumarins possessing a bromine substituent either on the 3-aryl ring, the coumarin moiety or on a lateral chain of a coumarin is reported. The regioselectivity is influenced by the substituents present in the substrates.
