Pd/C: an efficient and heterogeneous protocol for oxidative carbonylation of diols to cyclic carbonate
作者:Sujit P. Chavan、Bhalchandra M. Bhanage
DOI:10.1016/j.tetlet.2013.12.116
日期:2014.2
practical approach for the synthesis of cycliccarbonate via oxidative carbonylation of diols, glycerol, and its derivatives using Pd/C as a heterogeneous, inexpensive, and recyclable catalyst. The effect of various reaction parameters, such as solvent, base, time, and temperature was investigated and applied for the synthesis of value added cycliccarbonates in a good to excellent yield within shorter
Synthesis of cyclic carbonates from diols and CO<sub>2</sub> catalyzed by carbenes
作者:Felix D. Bobbink、Weronika Gruszka、Martin Hulla、Shoubhik Das、Paul J. Dyson
DOI:10.1039/c6cc05730f
日期:——
The synthesis of cycliccarbonatesfromepoxides and CO2 is a well-established reaction, whereas the synthesis of cycliccarbonatesfrom diols and CO2 is considerably more challenging, and few efficient...
Efficient catalytic conversion of terminal/internal epoxides to cyclic carbonates by porous Co(<scp>ii</scp>) MOF under ambient conditions: structure–property correlation and computational studies
作者:Bhavesh Parmar、Parth Patel、Renjith S. Pillai、Rukhsana I. Kureshy、Noor-ul H. Khan、Eringathodi Suresh
DOI:10.1039/c8ta10631b
日期:——
Schiff base ligand L favored the efficient solvent-free cycloaddition reaction of CO2 with different epoxides. Strikingly, CoMOF-1′ exhibited good catalytic efficiency for CO2 coupled with various terminalepoxides at ambient temperature and pressure (1 bar, 60 °C, 12 h) and with a variety of internal epoxides at moderate reaction conditions (30 bar, 100 °C, and 8 h) with good yield and recyclability. Further
混合配体三维中性多孔骨架[Co(OBA)(L)] x G} n(CoMOF-1)(H 2 OBA = 4,4'-氧双(苯甲酸); L =(E) -通过水热和回流方法成功地合成了N ′-(吡啶-4-基亚甲基)异烟酰肼; G = DMF,EtOH,MeOH,H 2 O)。将活化的MOF(CoMOF-1' )不仅表现出对CO良好的亲和性2分子,同时也表现出对CO良好的催化性能2具有各种末端和内部环氧化物的转化。大正则蒙特卡罗(GCMC)模拟证明了CO 2分子与MOF的酰胺官能团之间的强相互作用。Co(II)中心的路易斯酸度由OBA配体弱螯合的羧酸盐赋予,而路易斯基碱性则来自基于吡啶基的席夫碱配体L的酰胺基官能团,这促进了不同浓度的CO 2的无溶剂高效环加成反应。环氧化物。令人惊讶的是,CoMOF-1'对CO 2表现出良好的催化效率在环境温度和压力(1 bar,60°C,12 h)下与各种末端环氧化物结合,并在中等反应条件下(30
CO2 fixation by cycloaddition of mono/disubstituted epoxides using acyl amide decorated Co(II) MOF as a synergistic heterogeneous catalyst
作者:Parth Patel、Bhavesh Parmar、Renjith S. Pillai、Amamudin Ansari、Noor-ul H. Khan、Eringathodi Suresh
DOI:10.1016/j.apcata.2019.117375
日期:2020.1
synthesized via simple room temperature stirring method. BulkPhase purity of CoMOF-2 was assessed by various physicochemical methods including X‐ray diffraction (XRD). CO2 adsorption isotherms indicate that activated CoMOF-2 is efficient in CO2 uptake, which has been utilized for the CO2-Epoxide cycloaddition. The catalytic ability of CoMOF-2 as a binary catalyst revealed excellent results for variety of
通过简单的室温搅拌法合成了双配位体3D MOF [Co(BDC)(L)]·2H 2 O.xG} n(CoMOF-2 ; G = guest)。CoMOF-2的体相纯度通过各种物理化学方法(包括X射线衍射(XRD))进行了评估。CO 2吸附等温线表明,活化的CoMOF-2是在CO高效2的吸收,已被用于将CO 2 -Epoxide环加成。CoMOF-2的催化能力作为二元催化剂,在无溶剂条件下(1 bar / 40°C / 12 h),各种单取代的环氧化物均具有优异的结果。有趣的是,CoMOF-2 / KI还显示出作为双取代环氧化物的非均相催化剂(10 bar / 120°C / 24 h)的高潜力/高收率/选择性。与较早的报道相比,本研究对很少探索的二取代的环氧化物的催化效率更好/与之相当,并且催化剂的可回收性是附加的优点。推导了催化反应的可能机理,并通过DFT计算验证了CO 2-环己烷氧化物(CHO)的环加成反应的典型能谱。
An in situ formed Ca<sup>2+</sup>–crown ether complex and its use in CO<sub>2</sub>-fixation reactions with terminal and internal epoxides
作者:J. Steinbauer、A. Spannenberg、T. Werner
DOI:10.1039/c7gc01114h
日期:——
Calcium punched beyond its weight: An in situ formed Ca2+–crown ether complex showed unprecedented efficiency in cyclic carbonate synthesis.