292638-85-8Relevant articles and documents
A green route to methyl acrylate and acrylic acid by an aldol condensation reaction over H-ZSM-35 zeolite catalysts
Ma, Zhanling,Ma, Xiangang,Liu, Hongchao,He, Yanli,Zhu, Wenliang,Guo, Xinwen,Liu, Zhongmin
, p. 9071 - 9074 (2017)
A one-step aldol condensation reaction to produce MA and AA is a green and promising strategy. Here, the aldol condensation reaction was first conducted with DMM and MAc over different types of zeolite catalysts. The H-ZSM-35 zeolite demonstrates excellent catalytic performance with a DMM conversion of 100% and a MA + AA selectivity of up to 86.2% and superior regeneration ability, with great potential for industrial operation.
Highly Catalytic Activity of Ba/Γ-Ti–Al2O3 Catalyst for Aldol Condensation of Methyl Acetate with Formaldehyde
Bao, Qiang,Qi, Hui,Zhang, Chunlei,Ning, Chunli,Zhang, Yi,Jiang, Ye,Wu, Yifan,Gui, Wenying,Wang, Zhenlu
, p. 3402 - 3412 (2018)
Abstract: In this work, titanium-doped mesoporous Al2O3 (γ-Ti–Al2O3) was prepared by an evaporation-induced self-assembly method and used as a carrier of Ba/γ-Ti–Al2O3 catalyst to catalyze the aldol condensation of methyl acetate with formaldehyde to methyl acrylate in a fixed-bed reactor. The catalysts were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, N2 adsorption–desorption, pyridine absorption performed via Fourier transform infrared spectroscope (Py-IR), and NH3 and CO2 temperature-programmed desorption (NH3 and CO2-TPD). Experimental results indicated that the doping of the titanium species into the frame work of mesoporous Al2O3 (γ-Ti–Al2O3) had a significant influence on the catalytic activity via modifying the acid–base surface properties of the catalyst. Furthermore, the Ba/γ-Ti–Al2O3 catalyst demonstrated excellent catalytic performance, with a methyl acetate conversion rate of 50% and methyl acrylate selectivity up to 90.2%. Compared with the Ba/Al2O3 catalyst, the Ba/γ-Ti–Al2O3 catalyst had better catalytic activity, stability and potential for practical application, which was likely due to an increased number of Lewis acid sites, especially the medium acid sites. Graphical Abstract: Barium supported mesoporous γ-Ti–Al2O3 catalyst was found to be an effective catalyst for vapor phase aldol condensation of methyl acetate with formaldehyde. [Figure not available: see fulltext.].
On the Detailed Pathway of Methyl Loss from Ionized Methyl Isobutyrate in the Gas Phase
Goeksu, Ekrem,Weiske, Thomas,Halim, Herman,Schwarz, Helmut
, p. 1167 - 1168 (1984)
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The 2V-P,N polymer supported palladium catalyst for methoxycarbonylation of acetylene
Chen, Xingkun,Zhu, Hejun,Wang, Tao,Li, Cunyao,Yan, Li,Jiang, Miao,Liu, Jia,Sun, Xueping,Jiang, Zheng,Ding, Yunjie
, p. 37 - 46 (2016)
Heterogenization of homogeneous catalyst by immobilizing complex on the surface of polymer supports promotes the design of the catalysts which combine the advantages of heterogeneous and homogeneous catalysts. The porous 2-vinyl-functional diphenyl-2-pyri
Ozonolysis of 1,1-Dimethoxyethene, 1,2-Dimethoxyethene, and Vinyl Acetate
Wojciechowski, Brenda J.,Chiang, Chin-Yun,Kuczkowski, Robert L.
, p. 1120 - 1122 (1990)
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Formation of methyl acrylate from CO2 and ethylene via methylation of nickelalactones
Bruckmeier, Christian,Lehenmeier, Maximilian W.,Reichardt, Robert,Vagin, Sergei,Rieger, Bernhard
, p. 2199 - 2202 (2010)
The nickel-induced coupling of ethylene and CO2 represents a promising pathway toward acrylates. To overcome the high bond dissociation energies of the M-O moieties, we worked out an in situ methylation of nickelalactones to realize the β-hydride elimination and the liberation of the acrylate species.
One-step aldol condensation reaction of dimethoxymethane and methyl acetate over supported Cs/ZSM-35 zeolite catalysts
Ma, Zhanling,Ma, Xiangang,Liu, Hongchao,Zhu, Wenliang,Guo, Xinwen,Liu, Zhongmin
, p. 1129 - 1137 (2018)
This study was performed for the development of a green and promising approach for the synthesis of methyl acrylate and acrylic acid by a one-step aldol condensation reaction of dimethoxymethane and methyl acetate over cesium oxide-supported on ZSM-35 zeo
Precisely phase-modulated VPO catalysts with enhanced inter-phase conjunction for acrylic acid production through the condensation of acetic acid and formaldehyde
Liu, Jun,Wang, Pengcheng,Feng, Yina,Xu, Zhijia,Feng, Xinzhen,Ji, Weijie,Au, Chak-Tong
, p. 171 - 182 (2019)
A type of precisely phase-modulated vanadium phosphorus oxides (VPOs)was fabricated for the first time by quantitatively mixing the pure phase of γ-VOPO4, δ-VOPO4, and (VO)2P2O7 in certain ratios through a mechanical milling approach. The resulting materials were used as catalysts for very efficient condensation of acetic acid and formaldehyde to acrylic acid as well as methyl acrylate. The modulated dual phase VPO catalyst outperforms the single-phase counterpart, and by optimizing the reaction conditions especially the contact time, we can further considerably enhance the catalyst performance. Over an optimized catalyst of δ-VOPO4/γ-VOPO4 (w/w, 3/1), the (AA + MA)yield of 84.2% with the equivalent (AA + MA)formation rate of 1.71 mmol·g?1·h?1 or the (AA + MA)yield of 41.8% with the equivalent (AA + MA)formation rate of 4.25 mmol·g?1·h?1 is achievable at 360 °C on the formaldehyde input basis. This sort of catalyst is rather durable within a period of 110 h, and fully recovered by simple air-treatment at the reaction temperature. Due to the enhanced conjunction at the interface of two phases, the surface property of phase-modulated catalyst such as the P-O bond length and surface acidity is notably modified/enhanced, accounting for the promising catalytic performance.
Aldol condensation of acetic acid with formaldehyde to acrylic acid over Cs(Ce, Nd) VPO/SiO2 catalyst
Wang, Aili,Hu, Jing,Yin, Hengbo,Lu, Zhipeng,Xue, Wuping,Shen, Lingqin,Liu, Shuxin
, p. 48475 - 48485 (2017)
Cs, Ce, and Nd cation-modified VPO/SiO2 catalysts were prepared by a deposition method. The VPO/SiO2 catalyst was composed of VOPO4 and (VO)2P2O7 phases. When Cs, Ce, and Nd cations were added in the VPO/SiO2 catalyst, Cs4P2O7, CePO4, and NdPO4 were formed and V5+/V4+ ratio increased, respectively. The basicities of the metallic cation-modified catalysts increased while their acidities exhibited maximum values with the increase in the ratios of metallic cation to vanadium. The metallic cation-modified VPO/SiO2 catalysts exhibited higher catalytic activities for the aldol condensation reaction of acetic acid with formaldehyde to acrylic acid than the VPO/SiO2 catalyst. The high acidity and basicity of the metallic cation-modified VPO/SiO2 catalysts favored the formation of acrylic acid.
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Ping,Lapidus
, (1977)
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Scalable Total Synthesis of (-)-Triptonide: Serendipitous Discovery of a Visible-Light-Promoted Olefin Coupling Initiated by Metal-Catalyzed Hydrogen Atom Transfer (MHAT)
Fang, Xianhe,Zhang, Nan,Chen, Si-Cong,Luo, Tuoping
supporting information, p. 2292 - 2300 (2022/02/09)
An efficient and scalable total synthesis of (-)-triptonide is accomplished based on a metal-catalyzed hydrogen atom transfer (MHAT)-initiated radical cyclization. During the optimization of the key step, we discovered that blue LEDs significantly promoted the efficiency of reaction initiated by Co(TPP)-catalyzed MHAT. Further exploration and optimization of this catalytic system led to development of a dehydrogenative MHAT-initiated Giese reaction.
Method for preparing methyl acrylate from methyl acetate
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Paragraph 0138-0168, (2021/04/28)
The invention provides a method for preparing methyl acrylate from methyl acetate, which comprises the following steps: in the presence of a solid base catalyst, methyl acetate reacts with an aldehyde source to obtain methyl acrylate, and the solid base catalyst comprises the following components in parts by mass: a) a catalytic amount of alkali metal oxide; and b) 50 to 80 parts of a carrier; wherein the carrier is silicon dioxide of which the silicon hydroxyl density is 0.6-1.5 Si-OH/nm. The invention also provides a solid base catalyst, and an application and a preparation method thereof. The methyl acrylate synthesis route and the corresponding solid base catalyst have the advantages that the yield and selectivity are improved, and the catalytic activity can be maintained for a long time, so that the industrialization can be realized, and the problem that the production capacity of methyl acetate is greatly excessive is solved.
Pd-Catalyzed Intermolecular Transthiolation of Ar-OTf Using Methyl 3-(Methylthio) Propanoate as a Thiol Surrogate
Pan, Dandan,Xu, Shasha,Tian, Qingqiang,Li, Yahui
supporting information, p. 4616 - 4619 (2021/09/10)
A method for the odorless synthesis of unsymmetrical sulfides via Csp2?O and Csp3?S bond activation is presented. Using methyl 3-(methylthio) propanoate as a MeSH surrogate, a series of substituted aryl methyl sulfides have been obtained in moderate to good yields. This catalytic protocol can also tolerate methyl 3-(methylthio)propionate derivatives to afford the corresponding aryl sulfides.
