Category: 539-88-8

He, Aiyong published the artcileHigh-Efficiency Catalytic Transfer Hydrogenation of Biomass-Based 5-Hydroxymethylfurfural to 2,5-Bis(hydroxymethyl)furan over a Zirconium-Carbon Coordination Catalyst, Computed Properties of 539-88-8, the main research area is catalytic transfer hydrogenation hydroxymethylfurfural hydroxymethylfuran zirconium carbon.

Constructing a cheap and high-performance catalyst is very important for the selective synthesis of biomass-based 2,5-bis(hydroxymethyl)furan (BHMF) from 5-hydroxymethylfurfural via the strategy of catalytic transfer hydrogenation (CTH). Herein, we synthesized a neoteric zirconium-carbon coordination catalyst (Zr-HTC) via a simple self-assembly method, in which glucose-derived hydrothermal carbon (HTC) containing abundant carboxyl and phenolic hydroxyl groups was directly used as a low-cost organic ligand. Satisfyingly, Zr-HTC showed an outstanding catalytic activity for the selective synthesis of BHMF in isopropanol (iPrOH). After 4 h at a mild temperature of 120°C, 99.2% BHMF yield with 5.61 h-1 turnover frequency (TOF) could be obtained. Detailed exptl. results demonstrated that this outstanding catalytic activity of Zr-HTC was mainly contributed by the synergetic effects of Lewis acid-base sites (Zr4+-O2-) with high contents, proper ratios, and strengths under the aid of good hydrophilicity. In addition, Zr-HTC displayed superior catalytic stability, and when it was repeatedly used for five reaction cycles, no noticeable decrease in BHMF yield was found. More significantly, Zr-HTC could also effectively convert a wide range of carbonyl compounds, such as 1-butanal, 1-hexanal, furfural, cyclohexanal, benzaldehyde, phenylacetaldehyde, cyclopentanone, cyclohexanone, levulinic acid, and Et levulinate, to the relevant products in iPrOH. Overall, this work offers a new viewpoint to develop more practical zirconium-containing coordination catalysts for the selective synthesis of valuable chems. via CTH.

ACS Sustainable Chemistry & Engineering published new progress about Alcohols Role: NUU (Other Use, Unclassified), USES (Uses). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Computed Properties of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Pinheiro, Patricia Fontes published the artcileOne-pot synthesis of alkyl levulinates from biomass derivative carbohydrates in tin(II) exchanged silicotungstates-catalyzed reactions, Quality Control of 539-88-8, the main research area is tin exchanged Keggin heteropolyacid catalysis carbohydrate alcoholysis alkyl levulinate.

Biomass is an attractive source of carbohydrates that can be converted to fuels and fine chems. Acid-catalyzed alcoholysis of biomass derivatives provides alkyl levulinates, which are fuel bioadditives, intermediates in the synthesis of drugs and agrochems. In this work, we developed a one-pot route to obtain alkyl levulinates using Sn(II) exchanged Keggin heteropolyacids (i.e., H3PW12O40, H3PMo12O40, and H4SiW12O40) as catalysts, in alcoholysis reactions of various carbohydrates. All the catalysts were characterized by FT-IR, XRD, EDS/SEM, TG/DSC, and BET anal. The tin(II) silicotungstate was the most active and selective catalyst. After 2 h of reaction carried out at 423 K, an almost complete conversion was achieved on the ethanolysis of the fructose, sucrose and inulin, which gave high yields of Et levulinate (ca. 78, 71 and 61 mol%, resp.). In all reactions, 5-ethoxymethylfurfural was always the secondary product. Maltose, galactose, and glucose were almost unreactive. The effects of main parameters of reaction, such as temperature, catalyst load, and type of alcs. were assessed. The Sn2SiW12O40 catalyst was easily recovered and successfully reused for 7 cycles, without loss activity.

Cellulose (Dordrecht, Netherlands) published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Quality Control of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Annatelli, Mattia published the artcileAlkyl Levulinates from Furfuryl Alcohol Using CT151 Purolite as Heterogenous Catalyst: Optimization, Purification, and Recycling, Application of Ethyl 4-oxopentanoate, the main research area is alkyl levulinate preparation; furylmethanol alkyl alc purolite catalyst alcoholysis.

Com. available Purolite CT151 demonstrated to be an efficient acid catalyst for the synthesis of alkyl levulinates via alcoholysis of furfuryl alc. (FA) at mild temperatures (80-120°C) and short reaction time (5 h). Reaction conditions were first optimized for the synthesis of Et levulinate and then tested for the preparation of methyl-, propyl-, isopropyl-, Bu, sec-butyl- and allyl levulinate. Preliminary scale-up tests were carried out for most of the alkyl levulinates (starting from 5.0 g of FA) and the resulting products were isolated as pure by distillation in good yields (up to 63%). Furthermore, recycling experiments, conducted for the preparation of Et levulinate, showed that both the Purolite CT151 and the exceeding ethanol was recovered and reused for four consecutive runs without any noticeable loss in the catalyst activity.

Sustainable Chemistry published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Application of Ethyl 4-oxopentanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Bernardo, Joana R. published the artcileHReO4 as highly efficient and selective catalyst for the conversion of carbohydrates into value added chemicals, Computed Properties of 539-88-8, the main research area is HReO4 catalyst carbohydrate conversion.

This work describes the first catalyst (HReO4) that promotes the efficient and selective conversion of several carbohydrates into four compounds, Et levulinate (EL), 5-ethoxymethylfurfural (EMF), 5-hydroxymethylfurfural (HMF) and levulinic acid (LA), through a one-pot reaction strategy adjusting the reaction conditions. The reaction of fructose in ethanol at 160 °C gave EL in 80% yield after 16 h and in a mixture of ethanol/THF at 140 °C produced EMF in 73% yield after 1 h. HMF and LA can also be obtained selectively with 100% yield from fructose at 140 °C after 1 h, in DMSO or 1,4-dioxane, resp. EL, HMF, LA and EMF were also produced in moderate to good yields from other carbohydrates such as inulin and sucrose. The catalyst HReO4 can be used in gram scale for the production of EL, EMF, HMF and LA with good yields and in at least 8 catalytic cycles on the conversion of fructose into EL with no significant reduction in its activity.

Molecular Catalysis published new progress about Carbohydrates Role: RCT (Reactant), RACT (Reactant or Reagent). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Computed Properties of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Casas, Fernando published the artcileA Diaminopropane Diolefin Ru(0) Complex Catalyzes Hydrogenation and Dehydrogenation Reactions, Recommanded Product: Ethyl 4-oxopentanoate, the main research area is diolefin diaminopropane ruthenium dehydrogenated iminopropenamide complex catalyst preparation; carboxylic acid preparation; primary alc oxidation diolefin diaminopropane ruthenium complex catalyst; amide preparation; amine primary alc dehydrogenative coupling diolefin diaminopropane ruthenium catalyst; alc amine preparation; ester ketone aldehyde imine olefin hydrogenation DAP ruthenium catalyst.

New ruthenium (0) complexes with a cooperative diolefin diaminopropane (DAP) or dehydrogenated iminopropenamide ligand (IPA) were synthesized for comparison with their diaminoethane (DAE)/diazadiene (DAD) ruthenium analogs. These DAP/IPA complexes were efficient catalysts in dehydrogenation reactions of alk. aqueous methanol which proceeded under mild conditions (T=70 °C) and of higher alcs., forming corresponding carbonate and carboxylates, resp. The scope of reaction included an example of a 1,2-diol as model for biomass derived alcs. Their catalytic applications were extended to atom-efficient dehydrogenative coupling of alcs. and amines to amides. The reaction proceeded without any additives and was applicable to synthesis of formamides from methanol. Moreover, DAP/IPA complexes catalyzed hydrogenation of a series of esters, lactone, ketone, activated olefin, aldehyde and imine substrates. The diaminopropane Ru catalyst I exhibited higher activity compared to dehydrogenated β-ketiminate (IPA) and previously studied DAD/DAE based catalysts. The studies on their stoichiometric reactivity with relevance to their possible catalytic mechanisms and isolation and full characterization of key reaction intermediates were also presented.

ChemCatChem published new progress about Amides Role: SPN (Synthetic Preparation), PREP (Preparation). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Recommanded Product: Ethyl 4-oxopentanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Sun, Kai published the artcileImportance of the synergistic effects between cobalt sulfate and tetrahydrofuran for selective production of 5-hydroxymethylfurfural from carbohydrates, Name: Ethyl 4-oxopentanoate, the main research area is cobalt sulfate THF carbohydrate hydroxymethylfurfural.

In this study, an effective catalytic system (CoSO4·7H2O/THF) for selective conversion of fructose to 5-hydroxymethylfurfural (HMF; yield: 88%) was developed. The synergistic effects among Co2+, SO42-, crystal water and THF (THF) were crucial for achieving selective dehydration of fructose to HMF. Co2+ worked as a Lewis acid for catalyzing mainly dehydration of fructose to HMF but not the further decomposition of HMF to levulinic acid. THF could help to retain HMF while CoSO4 could coordinate with HMF, enhancing the thermal stability of HMF in THF. The crystal water in cobalt sulfate could help to coordinate with fructose, which facilitated the conversion of fructose via dehydration reactions. The CoSO4·7H2O/THF catalytic system could also catalyze the conversion of inulin and cellulose into HMF. The main advantages of the CoSO4·7H2O/THF catalytic system are the low cost, the easy recycling of the CoSO4·7H2O catalyst and the easy separation of HMF from volatile THF.

Catalysis Science & Technology published new progress about Esters Role: SPN (Synthetic Preparation), PREP (Preparation). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Name: Ethyl 4-oxopentanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Figliolia, Rosario published the artcileCNN pincer ruthenium complexes for efficient transfer hydrogenation of biomass-derived carbonyl compounds, Synthetic Route of 539-88-8, the main research area is ruthenium pincer CNN aryl pyridinemethanamine phosphine carbonyl complex preparation; transfer hydrogenation catalyst ketone aldehyde pincer CNN pyridinemethanamine complex; alc preparation transfer hydrogenation cellulose lignin derived aldehyde ketone.

The ligand HCNNOMe [6-(4-methoxyphenyl)-2-pyridinemethanamine, H2NCH2pyC6H4OMe, py = 2,6-pyridinediyl] is easily prepared by Pd/C-catalyzed reductive amination of the com. available 6-(4-methoxyphenyl)-2-pyridinecarboxaldehyde (H2, 1 atm). The pincer complexes cis-[RuCl(H2NCH2pyC6H3OMe)(PPh3)2] (1) and [RuCl(H2NCH2pyC6H3OMe)(PP)] (2, PP = dppb; 3, PP = dppf) are synthesized from [RuCl2(PPh3)3], H2NCH2pyC6H4OMe and dppb or dppf in 2-propanol with NEt3 at reflux and are isolated in 85-93% yield. Carbonylation of 1 (CO, 1 atm) gives [RuCl(H2NCH2pyC6H3OMe)(CO)(PPh3)] (4) (79% yield) which cleanly reacts with Na[BArf4] and PCy3, affording the cationic trans-[Ru(H2NCH2pyC6H3OMe)(CO)(PCy3)(PPh3)][BArF4] (5) (92% yield). These robust pincer complexes display remarkably high catalytic activity in the transfer hydrogenation (TH) of lignocellulosic biomass carbonyl compounds, using 2-propanol at reflux in a basic medium (NaOiPr or K2CO3). Thus, furfural, 5-(hydroxymethyl)furfural and cyrene are reduced to the corresponding alcs. with 2 and 3, at S/C in the range of 10 000-100 000, within minutes or hours (TOF up to 1 500 000 h-1). The monocarbonyl complex 5 was found to be extremely active in the TH of cinnamaldehyde, vanillin derivatives and Et levulinate at S/C in the range of 10 000-50 000. Vanillyl alc. is also obtained by the TH of vanillin with 5 (S/C = 500) in 2-propanol in the presence of K2CO3.

Dalton Transactions published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Synthetic Route of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Leng, Yan published the artcileA tannin-derived zirconium-containing porous hybrid for efficient Meerwein-Ponndorf-Verley reduction under mild conditions, Related Products of esters-buliding-blocks, the main research area is reusable zirconium tannin complex catalyst preparation property; carbonyl compound zirconium Meerwein Ponndorf Verley reduction green chem; alc preparation.

Tannins were simply assembled with zirconium in water for the scalable preparation of a heterogeneous zirconium-tannin hybrid catalyst (Zr-tannin) was studied. Various characterizations demonstrated the formation of robust porous inorganic-organic frameworks and strong Lewis acid-base sites in Zr-tannin. The cooperative effect of these acid-base sites and the abundant porosity endowed Zr-tannin with a remarkable catalytic performance for the MPV reduction of a broad range of carbonyl compounds to alcs. with 2-propanol under mild conditions. Moreover, Zr-tannin exhibited good recyclability for at least five reaction cycles. This novel strategy using tannins as the raw materials to construct heterogeneous catalytic materials may have a huge potential for green chem. synthesis due to low cost, nontoxicity, and sustainability.

Green Chemistry published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Related Products of esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Chen, Yuxin published the artcileDirect use of the solid waste from oxytetracycline fermentation broth to construct Hf-containing catalysts for Meerwein-Ponndorf-Verley reactions, Safety of Ethyl 4-oxopentanoate, the main research area is hafnium based oxytetracycline fermentation broth residue catalyst preparation; alc green preparation; biomass derived carbonyl compound hafnium catalyst Meerwein Ponndorf Verley.

In this study, a novel route of using oxytetracycline fermentation broth residue (OFR) was proposed that OFR was used as the organic ligands to construct a new hafnium based catalyst (Hf-OFR) for Meerwein-Ponndorf-Verley (MPV) reactions of biomass-derived platforms. The acidic groups in OFR were used to coordinate with Hf4+, and the carbon skeleton structures in OFR were used to form the spatial network structures of the Hf-OFR catalyst. The results showed that the synthesized Hf-OFR catalyst could catalyze the MPV reduction of various carbonyl compounds under relatively mild reaction conditions, with high conversions and yields. Besides, the Hf-OFR catalyst could be recycled at least 5 times with excellent stability in activity and structures. The prepared Hf-OFR catalyst possesses the advantages of high efficiency, a simple preparation process, and low cost in ligands. The proposed strategy of constructing catalysts using OFR might be provide new routes for both valuable utilization of the OFR solid waste in the fermentation industry and the construction of efficient catalysts for biomass conversion.

RSC Advances published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Safety of Ethyl 4-oxopentanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Li, Xiaomin published the artcileA novel hafnium-graphite oxide catalyst for the Meerwein-Ponndorf-Verley reaction and the activation effect of the solvent, Application In Synthesis of 539-88-8, the main research area is hafnium graphite oxide catalyst preparation; alc preparation; carbonyl compound Meerwein Ponndorf Verley hydrogenation hafnium graphite oxide.

A novel, efficient, and easily prepared hafnium-graphite oxide (Hf-GO) catalyst was constructed via the coordination between Hf4+ and the carboxylic groups in GO. Prepared catalyst was aplied for synthesis of alcs., e.g., I via hydrogenation of biomass derived carbonyl compounds using Meerwein-Ponndorf-Verley (MPV) reaction. The catalyst gave high efficiency under mild conditions. An interesting phenomenon was found whereby the activity of the catalyst increased gradually in the initial stage during reaction. The solvent, isopropanol, was proved to have an activation effect on the catalyst, and the activation effect varied with different alcs. and temperatures Further characterizations showed that isopropanol played the activation effect via replacing the residual solvent (DMF) in micro- and mesopores during the preparation process, which was hard to be completely removed by common drying process.

RSC Advances published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Application In Synthesis of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics