METHOD FOR PRODUCING CYCLIC CARBONATE HAVING UNSATURATED GROUP, AND NOVEL CYCLIC CARBONATE
申请人:DAIKIN INDUSTRIES, LTD.
公开号:US20210198228A1
公开(公告)日:2021-07-01
A method for producing a cyclic carbonate represented by the following formula (1):
wherein X
1
and X
2
are the same as or different from each other, and are each a hydrogen atom, a fluorine atom, or a monovalent organic group; and R is an organic group containing one or more carbon-carbon unsaturated bonds. The method includes reacting an unsaturated cyclic carbonate represented by the following formula (A):
wherein X
1
and X
2
are defined as described above, and an alcohol represented by the formula (B): R—OH, wherein R is defined as described above, or an alkoxide thereof in the presence of a base, or reacting the unsaturated cyclic carbonate and the alkoxide. Also disclosed is a method for producing a cyclic carbonate.
Fabrication of a Robust Lanthanide Metal–Organic Framework as a Multifunctional Material for Fe(III) Detection, CO<sub>2</sub> Capture, and Utilization
作者:Tan Jing、Lian Chen、Feilong Jiang、Yan Yang、Kang Zhou、Muxin Yu、Zhen Cao、Shengchang Li、Maochun Hong
DOI:10.1021/acs.cgd.8b00068
日期:2018.5.2
lanthanide metal–organicframeworks (Ln-MOFs) formulated as [LnL(H2O)2]·H2O}n (Ln = Eu, 1; Gd, 2; Tb, 3; Dy, 4) have been prepared under hydrothermal conditions. Single-crystal X-ray analyses reveal that compounds 1–4 are isomorphous and exhibit a three-dimensional network structure featuring a one-dimensional rectangular channel with a size of ca. 7.8 Å × 12.1 Å along the b axis. The framework shows strong
Pyridinium‐functionalized metalloporphyrins as bifunctional catalysts for cycloaddition of epoxides and carbon dioxide
作者:Jiajia Yi、Shu Sun、Zhonglu Li、Xuyun Gao、Xuzhuo Sun、Ning Wang、Jun Li
DOI:10.1002/aoc.5382
日期:2020.3
razolyl)phenyl)porphyrin) were synthesized as bifunctional catalysts for the cycloaddition reactions of epoxides and CO2. The effects of catalyst loading, CO2 pressure, reaction temperature and time on catalytic activity were investigated. ZnEtPpBr4 (1) and CoEtPpBr4 (2) exhibited efficient activities in the cycloaddition reactions of various epoxides with CO2 as at 120 °C under 2 MPa of CO2 pressure
The synthesis of diethyl carbonate (DEC) directly fromcarbondioxide, ethylene oxide (EO), and ethanol via one-pot reaction is reported for the first time. The effects of catalyst species and reaction variables on the synthetic performance of DEC were systematically studied. The integration of easily available KI and sodium ethoxide as homogeneous binary catalystsystem was found to be very active
首次报道了通过一锅法直接从二氧化碳,环氧乙烷(EO)和乙醇直接合成碳酸二乙酯(DEC)。系统地研究了催化剂种类和反应变量对DEC合成性能的影响。发现容易获得的KI和乙醇钠作为均相二元催化剂体系的集成对于一锅法反应非常有效,在相对温和的反应条件下(443 K,3 MPa CO 2)可以达到DEC收率的63.6%。初始压力2小时)。在优化的条件下,少量(<5%)生成了2-乙氧基乙醇的副产物,该副产物主要是通过乙醇通过开环反应将乙醇醇解而形成的。此外,热力学评估表明,一锅法反应的标准摩尔焓是放热的(Δ[RH米θ=-19.70大卡/摩尔<0)。与由CO 2和乙醇直接合成DEC相比,EO的参与促进了DEC的形成,同时生成了乙二醇。该策略也可以成功地扩展到末端环氧基质。此外,根据实验结果,提出了可能的反应机理。该方法提供了通过直接化学利用CO 2生产DEC的高效方法,并且在工业规模的碳酸二乙酯的制造中显示出有希望的应用。
Dynamic Metal–Iodide Bonds in a Tetracoordinated Cadmium-Based Metal–Organic Framework Boosting Efficient CO<sub>2</sub> Cycloaddition under Solvent- and Cocatalyst-Free Conditions
resulting large steric hindrance facilitates leaving of the coordinated iodide ions in a reversibly dynamic fashion convenient for the rate-determining step ring-opening as a strong nucleophile. Such a pristine MOF catalyst with self-independent catalytic ring-opening overcomes the complicated operation limitation of the traditional cocatalyst-free MOF systems based on encapsulating/postmodifying cocatalysts
由于CO 2 固有的热力学稳定性和动力学惰性,将CO 2非均相催化转化为环状碳酸酯通常需要苛刻的操作条件、高温高压和助催化剂的添加。因此,在无助催化剂和温和条件下开发高效的多相催化剂用于 CO 2转化一直是一个挑战。在此,合成了一种罕见的四配位Cd-MOF并用于催化CO 2在不添加任何助催化剂的情况下高效地进行环加成反应,并通过一系列实验系统地研究了其催化机理,包括荧光分析、X射线光电子能谱、微量热法和密度泛函理论(DFT)计算。Cd-MOF具有 3D 超分子结构,具有 1D 11.6 × 7.7 Å 2通道,丰富的路易斯酸/碱和 I -位点位于受限通道中,提高了 CO 2的效率在 60 °C 和 0.5 MPa 条件下,转化率最高为 98.2%,周转数值为 1080.11,远远超过大多数原始 MOF 基催化系统。结合实验和 DFT 计算表明,暴露的 Cd(II) Lewis 酸位点迅速参