Tag: M.W=50-100

Liu, Kai published the artcileOne-Pot Synthesis of Dimethyl Carbonate over a Binary Catalyst of an Ionic Liquid and an Alkali Carbonate under Low Pressure, Recommanded Product: 2-Methoxypropan-1-ol, the publication is ACS Omega (2021), 6(21), 13839-13846, database is CAplus and MEDLINE.

A mild and highly efficient approach has been developed for the one-pot synthesis of di-Me carbonate (DMC) from epoxide, carbon dioxide, and methanol under low initial pressure. The key to the successful transformation is the use of a bicomponent catalytic system composed of a hydroxyl-functionalized ionic liquid and an alkali carbonate. This bicomponent catalytic system demonstrated excellent reusability in four runs. Under the optimal reaction conditions, a 64% yield of DMC from propylene oxide and an 81% yield of DMC from ethylene oxide were obtained.

ACS Omega published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H10O2, Recommanded Product: 2-Methoxypropan-1-ol.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Fu, Yao published the artcileFirst-Principle Predictions of Absolute pK_a‘s of Organic Acids in Dimethyl Sulfoxide Solution, Name: 2-Methoxyacetamide, the publication is Journal of the American Chemical Society (2004), 126(3), 814-822, database is CAplus and MEDLINE.

MP2/6-311++G(d,p) and B3LYP/6-311++G(2df,p) methods are able to predict the gas-phase acidities of various organic acids with a precision of 2.2 and 2.3 kcal/mol. A PCM cluster-continuum solvation method was developed that could predict the solvation free energies of various neutral, cationic, and anionic organic species in DMSO with a precision of âˆ?.0 kcal/mol. Using these carefully tested methods, the authors successfully predicted the pK_a‘s of 105 organic acids in DMSO with a precision of 1.7-1.8 pK_a units. The authors also predicted the pK_a‘s of a variety of organosilanes in DMSO for the first time using the newly developed methods. This study was one of the first that employed first-principle methods for calculating pK_a‘s of unrelated compounds in organic solutions

Journal of the American Chemical Society published new progress about 16332-06-2. 16332-06-2 belongs to ethers-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Ether, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Name: 2-Methoxyacetamide.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Zeng, Bo published the artcileOn the origin of nitrogen-containing promoters in the cobalt-catalyzed methoxycarbonylation of epoxides, COA of Formula: C4H10O2, the publication is Applied Catalysis, A: General (2021), 118291, database is CAplus.

The detailed promotion mechanism of nitrogenous compounds in the cobalt-catalyzed methoxycarbonylation of epoxides has not been studied to date. Herein, we present the intrinsic correlation between nitrogenous promoters and activity and selectivity in the alkoxycarbonylation of epoxides by a comprehensive in situ IR spectroscopy and DFT studies. In situ IR spectroscopy confirmed the acid-base neutralization of the nitrogenous promoters and HCo(CO)₄, resulting in reduction of the acidity of the catalyst. With the reduced acid-derived activity for formation of ethers as byproducts, the selectivity of desired esters was increased. DFT calculations showed that a nitrogenous base could facilitate the methanolysis of cobalt-acyl species with lowered activation energy, which is considered to be the rate-determining step in the catalytic cycle. As a result, the reaction activity towards carbonylation was also improved by nitrogenous promoters. The present studies will provide new insights to the long-term confusing problems in epoxides carbonylation.

Applied Catalysis, A: General published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C5H6BNO2, COA of Formula: C4H10O2.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Huang, Jinfeng published the artcileSimultaneous determination of glycol ethers and their acetates in cosmetics by gas chromatography with mass spectrometry, SDS of cas: 1589-47-5, the publication is Journal of Separation Science (2018), 41(11), 2354-2359, database is CAplus and MEDLINE.

A gas chromatog. with mass spectrometry method was developed for the simultaneous determination of ten kinds of glycol ethers and their acetates in cosmetics. The samples were extracted with methanol/ethyl acetate (80:20, volume/volume), further treated with vortex and ultrasound, and analyzed by gas chromatog. with mass spectrometry. The concentration of each analyte was calibrated by the external standard method. Under the optimal conditions, the analytes showed linear relationship in the range of 0.05-25 mg/L with determination coefficients larger than 0.9987. The limits of detection and quantification were in the range of 0.09-0.59 and 0.31-1.95 mg/kg, resp. The average recoveries of three spiked levels were 80.2-105.4% with intra- and interday precisions of 1.1-6.3 and 1.9-6.5%, resp. Method validation from different labs confirmed the satisfactory recoveries and precisions. This method shows advantages of simple, high sensitivity, and high recovery, which can be applied to the detection of glycol ethers and acetates in cosmetics.

Journal of Separation Science published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H10O2, SDS of cas: 1589-47-5.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Wang, Gang published the artcileLiquid-Phase Epoxidation of Propylene with H₂O₂ over TS-1 Zeolite: Impurity Formation and Inhibition Study, Category: ethers-buliding-blocks, the publication is Industrial & Engineering Chemistry Research (2021), 60(32), 12109-12122, database is CAplus.

The liquid-phase epoxidation of propylene with H₂O₂ over titanium silicalite-1 (TS-1) zeolite was investigated in detail with a focus on the formation and inhibition of various trace impurities like acetaldehyde, propionaldehyde, acetone, hydroxyacetone, acetals, esters, etc. The results showed that the formation of trace impurities involved the transformation of propylene oxide (PO), its oxidation/isomerization/ring-opening (solvolysis and hydrolysis) byproducts, methanol solvent, and even propylene. Roughly speaking, the epoxidation conditions, viz., low temperature, short residence time, and slightly alk. reaction medium, that are beneficial to suppress the ring-opening byproducts of PO, were seen facilitating the inhibition of trace impurities as well. To lower the trace impurities via modification of the TS-1 catalyst, the hydrothermal modification of TS-1 with organic amines such as amino-2-propanol (MIPA) was attempted and its effectiveness was demonstrated. The TS-1 zeolite suitably modified by MIPA exhibited abundant Ti-OH groups (3672 cm^-1) together with remarkably decreased PO adsorption.

Industrial & Engineering Chemistry Research published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C9H7NO3, Category: ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Wang, Gang published the artcileInfluence of impurities in a methanol solvent on the epoxidation of propylene with hydrogen peroxide over titanium silicalite-1, Name: 2-Methoxypropan-1-ol, the publication is Catalysts (2020), 10(1), 15, database is CAplus.

The recycled methanol solvent of the HPPO (liquid-phase epoxidation of propylene and hydrogen peroxide to propylene oxide) process usually contains many kinds of trace impurities, such as fusel alc., aldehyde, ketone, ester, acetal, and amine. In this study, the influence of these impurities on the catalytic performance of titanium silicalite-1 (TS-1) in the liquid-phase epoxidation of propylene with H₂O₂ was investigated with a batch reactor and simulated methanol solvents. The results show that amine and acetone are the most hazardous impurities, as they could remarkably suppress the conversion of H₂O₂. Furthermore, competitive adsorption experiments and IR and UV-Raman spectroscopic studies indicate that the suppression effect of impurities on the catalytic activity of TS-1 can be attributed to the competitive adsorption of the impurities on the tetra-coordination framework Ti sites. With this funding, the suppression mechanism of different impurities in a methanol solvent on the catalytic activity of TS-1 in the liquid-phase epoxidation of propylene was discussed.

Catalysts published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C12H17NO2, Name: 2-Methoxypropan-1-ol.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Cai, Cheng published the artcileComparison of Two Acid Hydrotropes for Sustainable Fractionation of Birch Wood, Recommanded Product: 2-Methoxypropan-1-ol, the publication is ChemSusChem (2020), 13(17), 4649-4659, database is CAplus and MEDLINE.

This study reports on a comparative study of acid hydrotropic fractionation (AHF) of birch wood using maleic acid (MA) and p-toluenesulfonic acid (p-TsOH). Under the same level of delignification, lignin dissolved by MA is much less condensed with a higher content of ether aryl β-O-4 linkages. Lignin depolymerization dominated in MA hydrotropic fractionation (MAHF) and resulted in a single lower mol. weight peak, in contrast to the competitive depolymerization and repolymn. in p-TsOH AHF with a bimodal distribution. The less condensed MA-dissolved lignin facilitated catalytic conversion to monophenols. Carboxylation of residual lignin in fractionated cellulosic water-insoluble solids (WISs) enhanced enzymic saccharification by decreasing nonproductive cellulase binding to lignin. At a low cellulase loading of 10 FPU g^-1 glucan, saccharification of WIS-M_T120 from MAHF at 120°C was 95% compared with 48% for WIS-P_T85 from p-TsOH AHF at 85°C under the same level of delignification of 63%. Residual lignin carboxylation also facilitated nanofibrillation of WIS for producing lignin-containing cellulose nanofibrils (LCNFs) through an enhanced lignin lubrication effect, which substantially decreases fibrillation energy. LCNFs from only one pass of microfluidization of WIS-M_T120 have the same morphol. as those from WIS-P_T85 after three passes. MA also has a lower solubility and higher minimal hydrotropic concentration, which facilitated acid recovery. MA is U. S. Food and Drug Administration (FDA)-approved as an indirect food additive, affording significant advantages compared with p-TsOH for biorefinery applications.

ChemSusChem published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C4H10O2, Recommanded Product: 2-Methoxypropan-1-ol.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Zhang, Wenyu published the artcileFT-IR study of propylene oxide adsorption on metal oxides, Application of 2-Methoxypropan-1-ol, the publication is Advanced Materials Research (Durnten-Zurich, Switzerland) (2013), 169-173, 6 pp., database is CAplus.

The adsorption of propylene oxide (PO) onto MgO, ZnO and Al₂O₃ was investigated by using in situ-IR measurements. Detailed mechanisms for PO adsorption onto these metal oxides are proposed. It was found that the PO epoxide ring exhibits two opening tendencies, depending on the acid-base properties of the metal oxide. PO adsorbed onto MgO is preferentially opened at the O-C(1) bond. The epoxide ring provides two ways to open, at the O-C(1) or the O-C(2) bond on Al₂O₃. PO adsorbed onto ZnO showed no chem. adsorption on its surface.

Advanced Materials Research (Durnten-Zurich, Switzerland) published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C15H24S, Application of 2-Methoxypropan-1-ol.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Mo, Yi published the artcileStudy on highly/accurate quantum chemical calculations carried for a local region of a system, Computed Properties of 16332-06-2, the publication is Wuli Huaxue Xuebao (2002), 18(8), 716-720, database is CAplus.

The method proposed by us to carry out high accurate d. functional calculations in a local region of a large system was applied to the calculation of a series of different type of mols. and the data such as Mulliken charges, bond lengths, bond dissociation energies, the first ionization potentials and electronegativities were obtained. High accuracy calculations for the same set of mols. and the correspondent model mols. with a hydrogen atom replacing the part of a mol. surrounding the local region were also carried out with the conventional method for comparison. It is found that the results obtained by the local high accuracy calculation are in good agreement with those obtained by the conventional high accuracy calculation while the calculated results for the model mols. show larger deviation. The results presented in this paper show further that the local high accuracy calculation method proposed by us is practical and valuable.

Wuli Huaxue Xuebao published new progress about 16332-06-2. 16332-06-2 belongs to ethers-buliding-blocks, auxiliary class Amine,Aliphatic hydrocarbon chain,Amide,Ether, name is 2-Methoxyacetamide, and the molecular formula is C3H7NO2, Computed Properties of 16332-06-2.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Timofeeva, Maria N. published the artcileA layered titanosilicate AM-4 as a novel catalyst for the synthesis of 1-methoxy-2-propanole from propylene oxide and methanol, Related Products of ethers-buliding-blocks, the publication is Applied Catalysis, A: General (2019), 117240pp., database is CAplus.

In this paper we report for the first time the catalytic properties of the titanosilicate AM-4 in the synthesis of 1-methoxy-2-propanol (PGME) from methanol and propylene oxide (PO). PGME is widely used as a pollution-free solvent and intermediate in the synthesis of propylene glycol Me ether acetate, the herbicide metolachlor and in other industrial applications. We found that the catalytic properties of AM-4 could be adjusted by treatment with 0.0625-0.25 M HNO₃. Increasing the concentration of HNO₃ led to a decrease in basicity, which played a critical role in the reaction rate and the selectivity toward PGME. The yield of PGME decreased with increased acid concentration The maximum conversion of PO (88.4%) and the selectivity toward PGME (92.3%) were found to be in the presence of AM-4 at 110 °C and 8 mol/mol MeOH/PO. Our results suggest that titanosilicate AM-4 has great potential for application in basic catalysis.

Applied Catalysis, A: General published new progress about 1589-47-5. 1589-47-5 belongs to ethers-buliding-blocks, auxiliary class Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-Methoxypropan-1-ol, and the molecular formula is C16H20N2, Related Products of ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem