CATALYSIS LETTERS
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2019
·Vol. 150
·期 1
·178-184
·
IF 2.372
Li Zhi-Xin,Wei Xian-Yong,Yang Zheng,Zhang Min,Meng Xing-Long,Niu Shuo,Zhang Di,Zong Zhi-Min
Abstract Highly selective hydrogenation of furfural to furan-2-ylmethanol (FM) in isopropanol was achieved over a novel magnetic Cu–Co/C derived from zeolitic imidazolate frameworks prepared by galvanic replacement reaction. Furfural conversion and FM selectivity (FMS) are 100% and 97.2%, respectively, at 200 °C. FMS was held around 95% after 5-times recycle of the Cu–Co/C. In addition, cinnamaldehyde was completely converted with 96.8% of phenylpropanol selectivity over the Cu–Co/C at 150 °C. Graphic Abstract
研究领域:
化学工程
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催化材料科学
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DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2024
·
IF 4.1
Jianqi Tang,Yunhan Bai,Yucong Song,Xiaoshu Ding,Guirong Wang,Yanji Wang
The solubilities of methyl furan-2,5-dimethylenedicarbamate (FDC) and methyl tetrahydrofuran-2,5-dimethylenedicarbamate (THFDC) in dimethyl carbonate (DMC), anhydrous ethanol (EtOH) and benzene were studied using the static equilibrium method combined with high-performance liquid chromatography under atmospheric pressure at temperatures ranging from 278.15 K to 318.15 K. The experimental results demonstrate that the solubility of FDC and THFDC exhibits an upward trend as temperature increases. Among the six correlation models used, all of them (modified Apelblat equation, Buchowski-ksiazczak (λh) model, simplified two-parameter equation, polynomial equation, NRTL model and Wilson model) can effectively correlate the solubility data. Notably, the Wilson model demonstrates superior correlation performance compared to others in FDC system and the NRTL model demonstrates superior correlation performance compared to others in THFDC system. Using the modified Van’t Hoff equation and Gibbs equation, we calculated the apparent standard dissolution enthalpy ( Δ H sol ), the standard dissolution entropy change ( Δ S sol ), and the standard dissolution Gibbs energy ( Δ G sol ) for FDC and THFDC in different solvents. The research resulted indicate that all these dissolution processes are non-spontaneous, entropy-increasing endothermic processes. This study provides valuable reference data for crystallization and purification in industrial production.
研究领域:
化学工程
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物理化学
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DOI
高影响因子
ORGANIC & BIOMOLECULAR CHEMISTRY
·
2014
·Vol. 12
·期 27
·4885-4889
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IF 3.487
Jiaxing Hu,Zhihong Deng,Xueqiong Zhang,Fanglin Zhang,Hua Zheng
A convenient one-pot reaction was conducted by mixing bromoacetophenone, a functionalized α,β-unsaturated ketone and potassium hydroxide in tetrahydrofuran at room temperature, ammonium acetate was added and heated to reflux, resulting in four chemical bonds forming from easily accessible substrates. This process provides a flexible and rapid synthetic route for the construction of polysubstituted benzofuro[2,3-c]pyridines in moderate to good yields.
研究领域:
有机化学
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药物化学
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DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2014
·
IF 2.045
Yuhong Guo,Qiuxiang Yin,Hongxun Hao,Meijing Zhang,Ying Bao,Baohong Hou,Wei Chen,Hui Zhang,Wenjie Cong
Solubility data of furan-2-carboxylic acid in six pure solvents and two kinds of binary solvent mixtures were measured from 279.35 K to 326.15 K. The effect of solvent and temperature on the solubility of furan-2-carboxylic acid was discussed. The experimental solubility data of furan-2-carboxylic acid in six pure solvents were correlated by four thermodynamic models. The nearly ideal binary solvent (NIBS)/Redlich–Kister model was used to correlate the solubility data in binary solvent mixtures. In addition, the melting temperature and fusion enthalpy of furan-2-carboxylic acid were measured by differential scanning calorimetry. By using solubility data and the van’t Hoff equation, the dissolution entropy, enthalpy, and molar Gibbs free energy of furan-2-carboxylic acid in pure solvents were also obtained and analyzed.
研究领域:
化学
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热力学
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药物科学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2023
·
IF 3.8
Xiaochen Han,Chongyang Guo,Yugao Wang,Gang Liu,Jun Shen
Furan-2,5-dicarboxylic acid (FDCA) is an important biomass-derived diacid, and it is the most promising substitute for terephthalic acid. The common method of FDCA usually involves 5-hydroxymethylfurfural oxidation. Edible fructose is often used as the feedstock of 5-hydroxymethylfurfural, and the oxidation step would generate undesirable impurities. Herein, FDCA was novelty synthesized by carboxylation of formate and 2-furoic acid (FA) derived from unedible-biomass. This route is potentially advantageous because it is simple to operate and does not require any additional additives. The reaction mechanism has been elucidated by density functional theory (DFT) calculations. In the carboxylation process, the C(sp 2 )-H bond of formate (HCOOM) undergoes cleavage, generating the carbon dioxide radical anion (CO 2 •− ). Subsequently, CO 2 •− attacks the C 5 of FA, forming the C C bond and ultimately yielding FDCA. The conversion of HCOOM to CO 2 •− is an effective way to achieve carboxylation reaction. The rate-determining step of the carboxylation reaction is the cleavage of the C(sp 2 )-H bond of HCOO − with activation barrier of 159.11 kJ⋅mol −1 . The investigation would provide a new strategy for the mechanism of carboxylation reactions, and hold the potential to establish pathways for FDCA production.
研究领域:
化学
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材料科学
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生物化学
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DOI
高影响因子
Food Additives and Contaminants Part A-Chemistry Analysis Control Exposure & Risk Assessment
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2017
·
IF 2.047
Youwei Yu,Zhefeng Fan
An efficient magnetic sorbent consisting of benzofuran-2-carboxylic acid-loaded magnetic nanocomposite was successfully synthesised for pre-concentration of patulin from apple juice. The prepared magnetic nanocomposite was characterised by scanning electron microscopy, transmission electron microscopy and Fourier-transform infrared spectroscopy. Determination of enriched patulin was performed by high-performance liquid chromatography. The best adsorption conditions were 40 mg of sorbent, 50 ml of apple juice sample, pH 5, ambient temperature and 25 min; the elution conditions were 500 μl methanol, pH 5, ambient temperature, and 4 min. Under optimised conditions, pre-concentration factor was 100, linearity range was 1–400 μg l–1 of patulin, limit of detection was 0.15 μg l–1 and limit of quantification was 0.5 μg l–1. When samples were determined 20 times, the recovery was 93.9–102.6% and the relative standard deviation was below 5.3%. In terms of proposed procedure, the developed method was successfully applied for patulin detection in apple juice samples.
研究领域:
食品科学
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分析化学
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DOI
PubMed
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
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2020
·
IF 4.335
Haiyun Peng,Yu Zhang,Yang Zhu,Guisheng Deng
We report the synthesis of 4-(furan-2-yl)-3,4-dihydro-2H-pyrrol-2-one derivatives. In this approach, two core structures, the furan ring and 3,4-dihydro-2H-pyrrol-2-one, are constructed via silver(I)-catalyzed cascade cyclization/cyclopropanation/ring-cleavage/nucleophilic substitution reaction of enynones with enamines. A reasonable mechanism has been proposed. This method possesses some advantages such as high chemoselectivity, mild reaction conditions, simple operation, and short reaction time.
研究领域:
有机化学
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合成化学
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DOI
PubMed
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
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2023
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IF 3.6
Haiyun Peng,Yangyi Zhang,Guisheng Deng
Silver(I)-catalyzed tandem reaction of enynones with 4-alkenyl isoxazoles provides access to 2-(furan-2-yl)-1,2-dihydropyridines. No competitive cyclopropanation of alkenes and O–H insertion via (2-furyl)carbene complexes were observed. The cascade reaction proceeds via the formation of (2-furyl)metal carbene intermediate, the N–O bond cleavage of 4-alkenyl isoxazoles/rearrangement, subsequent 6π electrocyclic reaction, and [1,5] H-shift. The successive construction of both 1,2-dihydropyridine skeleton and furan frame has been achieved in the one-pot reaction. A broad range of readily available enynones and 4-alkenyl isoxazoles are suitable to this protocol; however, when R3 is the alkyl group such as n-Bu and Me, a complicated mixture was generated without the desired products. In addition, in the case of R4 = bulky group such as R3′SiOCH2, the reaction gave an in situ oxo-product of (2-furyl)silver carbene. An atom-economic strategy for the synthesis of 2-(furan-2-yl)-1,2-dihydropyridines has been established.
研究领域:
有机化学
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合成化学
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DOI
PubMed
高影响因子
JOURNAL OF ORGANIC CHEMISTRY
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2018
·
IF 4.805
Zhen-Hua Li,Zhi-Jiang Jiang,Qiao-Ling Shao,Jin-Jing Qin,Qiang-Feng Shu,Wen-Hao Lu,Wei-Ke Su
A one-pot cascade heterocyclization strategy has been developed for the synthesis of 2,4-dichloro-substituted pyrano[2,3-d]pyrimidines and furo[2,3-d]pyrimidines from linear γ- and β-ketomalononitriles using triphosgene and triphenylphosphine oxide. The reaction afforded synthetic useful products with moderate to good yields, bypassing the conventional harsh conditions of chlorination. The mechanistic study revealed that the reaction proceeded with a non-isocyanate route, and the second step may conduct in a triphenylphosphine oxide-catalyzed manner.
研究领域:
有机化学
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药物化学
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DOI
PubMed
高影响因子
Sustainable Energy & Fuels
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2024
·
IF 5
Fengyao Cong,Zhenjie Yu,Aiqin Wang,Yu Cong,Tao Zhang,Ning Li
In this work, a new route was developed for the synthesis of jet fuel range C16 and C11 paraffins with cellulose, the most abundant biomass. In the first step, cellulose was selectively converted to 5-methylfurfural (MFA) by a cascade hydrolysis/isomerization/dehydration/chlorination reaction in a toluene/NaCl aqueous solution biphasic system, followed by the hydrodechlorination over Pd/C catalyst at room temperature. After being decarbonylated, the MFA was converted to 2-methylfuran (2-MF). Among the investigated catalysts, Pd/C exhibited the highest activity for this reaction, which can be rationalized by the higher activity of Pd for the decarbonylation. Subsequently, tris(5-methylfuran-2-yl)methane (TMFM) was obtained by the solvent-free hydroxyalkylation/alkylation (HAA) reaction of MFA and 2-MF over a series of acidic resins. Among them, Nafion resin exhibited the highest activity, which can be rationalized by the high acid strength of this catalyst. Finally, the TMFM as obtained was hydrodeoxygenated to jet fuel range C16 and C11 paraffins under the co-catalysis of Ni/hydroxyapatite (Ni/HAP) and H-ZSM-5.
研究领域:
生物化学
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催化化学
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能源科学
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DOI
高影响因子
ChemistrySelect
·
2025
·Vol. 10
·期 4
·e202404857
·
IF 2
Wei Jiang,Chenkang Zhao,Yanfeng Liu,Yu Zu,Hongyu Guo,Guanghui Zhao,Weizhong Wang,Yong Sun
Graphical In this study, a straightforward coprecipitation method was employed to synthesize the bimetallic catalyst MnO@Co-CN, which demonstrates high efficiency in catalyzing the direct oxidative esterification of HMF to produce FDMC with a yield reaching 90.3%. The synergistic interactions between the dual metals during the reaction significantly enhance the catalytic performance for optimal oxidative esterification. As a versatile platform molecule derived from biomass, 5-hydroxymethylfurfural (HMF) has the potential to be transformed into a variety of chemicals. Of these, furan-2,5-dimethylcarboxylate (FDMC) stands out as an excellent precursor for the synthesis of poly(ethylene furandicarboxylate) (PEF), a polymer with broad applications in the production of various polymeric materials. However, a majority of studies have focused on the use of noble metal catalysts to achieve the direct oxidative esterification of HMF for the production of FDMC. Given the scarcity and high cost of noble metal catalysts, there is a pressing need to develop non-noble metal catalysts to efficiently facilitate the direct oxidative esterification of HMF. Accordingly, a bimetallic catalyst, MnO@Co-CN, was prepared in this paper by a simple coprecipitation method, and a 90.3% FDMC yield was obtained under optimal conditions. The findings revealed that in the oxidative esterification of HMF, MnO x predominantly adsorbs the reactants onto the catalyst surface, whereas CoO x is primarily responsible for the oxidation. The synergistic interaction between Mn and Co enhances the catalytic performance, leading to the superior oxidative esterification outcomes. This work offers a cost-effective, scalable method for FDMC synthesis, highlighting potential for industrial applications.
研究领域:
化学工程
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催化材料
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可再生资源转化
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Weizhen Xie,Binglin Chen,Wenlong Jia,Huai Liu,Zheng Li,Shuliang Yang,Xing Tang,Xianhai Zeng,Yong Sun,Xixian Ke,Tianyuan Li,Huayu Fang,Lu Lin
Developing an efficient and easily available catalyst for the selective conversion of biomass-derived 5-hydroxymethylfurfural (HMF) into furan-2,5-dimethylcarboxylate (FDMC), a valuable biomass-based monomer, remains a high demand but formidable challenge. Herein, a facile strategy for the synthesis of N-doped carbon-supported Co/Fe bimetallic catalyst (CoFe-NC) was developed, which provided an outstanding FDMC yield of 93% in a batch reactor (base-free, 80 °C, 2 bar O 2 , 4 h). Interestingly, CoFe-NC also gave a high FDMC yield of 91% under continuous-flow conditions for 80 h (5 bar O 2 , 80 °C, GHSV 1320 h −1 , LHSV 0.6 h −1 , base-free). Notably, it is the first time that a non-noble catalyst gave such a high FDMC yield under continuous-flow conditions. The introduction of Fe could greatly improve both the electron intensity of Co-N x species and basicity of the catalyst, which endowed CoFe-NC with improved O 2 activation capacity and enhanced dehydrogenation activity for the oxidation-esterification of HMF. This work delineates the efficient strategy on the construction of N-doped carbon-supported non-noble catalyst, which might open a new avenue for developing highly efficient catalyst for FDMC production.
研究领域:
催化化学
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生物质转化
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材料科学
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DOI
高影响因子
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