Day: April 7, 2022

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called E-waste derived silica-alumina for eco-friendly and inexpensive Mg-Al-Ti photocatalyst towards glycerol carbonate (electrolyte) synthesis: Process optimization and LCA, published in 2022-03-01, which mentions a compound: 931-40-8, mainly applied to magnesium aluminum titanium photocatalyst glycerol carbonate synthesis; E-waste Valorization; Glycerol carbonate; LCA; LDO photocatalyst; PCB derived silica-alumina; Solar simulated quartz halogen radiation, Name: 4-(Hydroxymethyl)-1,3-dioxolan-2-one.

Valorization of e-waste, i.e. waste printed circuit board (WPCB) through mechano-chem. activation to obtain silica as the catalyst support and alumina as the catalyst precursor for eco-friendly synthesis of inexpensive highly proficient photocatalyst has been explored. The WPCB derived silica-supported layered double oxide photocatalyst (MATLSW) and its counterpart (MATLSC) involving com. silica and alumina precursors were synthesized through the wet-impregnation method under energy-efficient solar simulated quartz halogen lamp (SSQHL) irradiations to improve its photocatalytic properties compared to conventional methods. The prepared MATLSW possessed a significantly low band-gap-energy (1.58 eV) that rendered efficient photocatalysis in the green-synthesis of glycerol carbonate (GC) (an effective electrolyte). The catalytic performance of the optimal MATLSW resulted in a superior yield of GC (98.68%) compared to that rendered by MATLSC catalyst (GC yield: 96.56%) at optimal process conditions. Detailed life cycle assessment (LCA) of the entire process (deploying Ecoinvent 3.5 database) dictated conducive environmental impacts concerning 1 kg GC synthesis alongside a scale-up study for 1 MT GC synthesis encompassing silica-alumina extraction from WPCB, MATLSW preparation, and employment of SSQHL-radiated batch reactor (SSQHLBR) (56.64% less energy consumption than conventional). The overall process deploying the novel MATLSW in conjunction with the effectual reactor demonstrated superiority over the conventional GC synthesis process through appreciable reductions of environmental impact parameters, namely GWP, FDP, and HTP by 5.78%, 3.60%, and 5.72% resp. The developed green process for e-waste utilization can procreate an effective waste management protocol towards a cleaner world.

Here is just a brief introduction to this compound(931-40-8)Name: 4-(Hydroxymethyl)-1,3-dioxolan-2-one, more information about the compound(4-(Hydroxymethyl)-1,3-dioxolan-2-one) is in the article, you can click the link below.

Reference:
Chiral Catalysts,
Chiral catalysts – SlideShare

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 931-40-8, is researched, Molecular C4H6O4, about Influence of the Counterion on the Synthesis of Cyclic Carbonates Catalyzed by Bifunctional Aluminum Complexes, the main research direction is pyrazolylphenylethanol preparation aluminum complexation counterion effect catalysis; cyclic carbonate preparation epoxide reaction carbon dioxide; bifunctional alkyl aluminum complex preparation catalyst cyclic carbonate preparation; crystal mol structure diethylaluminum pyrazolylphenylethanol complex.Recommanded Product: 931-40-8.

New bifunctional aluminum complexes have been prepared with the aim of studying the effect of a counterion on the synthesis of cyclic carbonates from epoxides and carbon dioxide (CO2). Neutral ligand, 2,2-bis(3,5-dimethylpyrazol-1-yl)-1-[4(dimethylamino)phenyl]-1-phenylethanol (1) was used as a precursor to obtain four novel mesylate, chloride, bromide, and iodide zwitterionic NNO ligands (2-5). The reaction of these ligands with 1 or 2 equivalent of AlR3 (R = Me, Et) allowed the synthesis of mono- and bimetallic bifunctional aluminum complexes [AlR2(κ2-mbpzappe)]X [X = Cl, R = Me (6), Et (7); X = Br, R = Me (8), Et (9); X = I, R = Me (10), Et (11)] and [{AlR2(κ2-mbpzappe)}(μ-O){AlR3}]X [X = MeSO3, R = Me (12), Et (13); X = Cl, R = Me (14), Et (15); X = Br, R = Me (16), Et (17); X = I, R = Me (18), Et (19)] via alkane elimination. These complexes were studied as catalysts for the synthesis of cyclic carbonates from epoxides and CO2. Iodide complex 11 showed to be the most active catalyst for terminal epoxides, whereas bromide complex 9 was the optimal catalyst when internal epoxides were used, showing the importance of the nucleophile cocatalyst on the catalytic activity.

Here is just a brief introduction to this compound(931-40-8)Recommanded Product: 931-40-8, more information about the compound(4-(Hydroxymethyl)-1,3-dioxolan-2-one) is in the article, you can click the link below.

Reference:
Chiral Catalysts,
Chiral catalysts – SlideShare

Category: chiral-catalyst. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Ethyl 5-chloro-3-formyl-1H-indole-2-carboxylate, is researched, Molecular C12H10ClNO3, CAS is 43142-76-3, about Design of C3-Alkenyl-Substituted 2-Indolylmethanols for Catalytic Asymmetric Interrupted Nazarov-Type Cyclization.

The C3-alkenyl-substituted 2-indolylmethanols were designed as a new class of substrates for catalytic asym. interrupted Nazarov-type cyclizations. In the presence of a chiral phosphoric acid as a mild chiral Bronsted acid, the interrupted Nazarov-type cyclization of C3-alkenyl-substituted 2-indolylmethanols I (R1 = Ph, 4-ClC6H4, 2-FC6H4, etc.; R2 = Ph, 3-FC6H4, 3-MeC6H4; R3 = H, Cl, Br, MeO) with nucleophiles R4H (R4 = 3-indolyl, 2-hydroxy-1-naphthyl, etc.) occurred smoothly to construct cyclopenta[b]indole frameworks II with generally excellent diastereo- and enantioselectivities (up to >95:5 dr, >99% ee).

Here is just a brief introduction to this compound(43142-76-3)Category: chiral-catalyst, more information about the compound(Ethyl 5-chloro-3-formyl-1H-indole-2-carboxylate) is in the article, you can click the link below.

Reference:
Chiral Catalysts,
Chiral catalysts – SlideShare

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Boujioui, Fadoi; Damerow, Helen; Zhuge, Flanco; Gohy, Jean-Francois researched the compound: 4-(Hydroxymethyl)-1,3-dioxolan-2-one( cas:931-40-8 ).Synthetic Route of C4H6O4.They published the article 《Solid Polymer Electrolytes Based on Copolymers of Cyclic Carbonate Acrylate and n-Butylacrylate》 about this compound( cas:931-40-8 ) in Macromolecular Chemistry and Physics. Keywords: cyclic carbonate acrylate copolymer solid polymer electrolyte ionic conductivity. We’ll tell you more about this compound (cas:931-40-8).

Solid polymer electrolytes (SPEs) are prepared by mixing poly((2-oxo-1,3-dioxolan-4-yl)methyl acrylate-random-n-butylacrylate) [P(cyCA-r-nBA)] statistical copolymers with bis(trifluoromethane)sulfonimide lithium salt. The P(cyCA-r-nBA) copolymers are synthesized by reversible addition-fragmentation chain transfer polymerization and different molar masses as well as copolymer composition are targeted in order to study the influence of the mol. parameters on the thermal, mech., and electrochem. properties of the SPEs obtained after mixing the copolymers with lithium salts. In the investigated exptl. window, it is shown that the thermal and mech. properties of the SPEs mainly depend on the composition of the copolymer and are poorly influenced by the molar mass. In sharp contrast, the ionic conductivities are more deeply influenced by the molar mass than by the composition of the copolymers. In this respect ionic conductivity values ranging from 4.2 x 10-6 S cm-1 for the lower molar mass sample to 8 x 10-8 S cm-1 for the higher molar mass one are measured at room temperature for the investigated SPEs.

Here is just a brief introduction to this compound(931-40-8)Synthetic Route of C4H6O4, more information about the compound(4-(Hydroxymethyl)-1,3-dioxolan-2-one) is in the article, you can click the link below.

Reference:
Chiral Catalysts,
Chiral catalysts – SlideShare

Application In Synthesis of 4-(Hydroxymethyl)-1,3-dioxolan-2-one. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 4-(Hydroxymethyl)-1,3-dioxolan-2-one, is researched, Molecular C4H6O4, CAS is 931-40-8, about The effect of silica-filler on polyurethane adhesives based on renewable resource for wood bonding. Author is Maminski, Mariusz L.; Wieclaw-Midor, Anna M.; Parzuchowski, Pawel G..

The aim of the study was to evaluate the applicability and performance of polyglycerol- and sucrose-based polyols as components of a simplified formulation of polyurethane adhesives. Colloidal silica was used as a viscosity control and reinforcing agent. The adhesives were examined in terms of reactivity, thermal stability, viscosity, work of adhesion, wetting, surface energy, and bonding strength on wooden substrates. Silica was found to increase gelling time, but markedly improved bonding strength and adhesion with substrates. Bonded solid beech wood samples prepared at 80, 110, and 130°C showed shear strengths between 7.1 MPa and 9.9 MPa with 100% wood failure. The renewable resource-based polyols were demonstrated to be useful in formulation of polyurethane adhesives for furniture industry-especially with silica as a filler.

Here is just a brief introduction to this compound(931-40-8)Application In Synthesis of 4-(Hydroxymethyl)-1,3-dioxolan-2-one, more information about the compound(4-(Hydroxymethyl)-1,3-dioxolan-2-one) is in the article, you can click the link below.

Reference:
Chiral Catalysts,
Chiral catalysts – SlideShare

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Okoye, Patrick U.; Wang, Song; Khanday, Waheed Ahmad; Li, Sanxi; Tang, Tao; Zhang, Linnan researched the compound: 4-(Hydroxymethyl)-1,3-dioxolan-2-one( cas:931-40-8 ).Computed Properties of C4H6O4.They published the article 《Box-Behnken optimization of glycerol transesterification reaction to glycerol carbonate over calcined oil palm fuel ash derived catalyst》 about this compound( cas:931-40-8 ) in Renewable Energy. Keywords: glycerol carbonate oil palm fuel ash Box Behnken optimization. We’ll tell you more about this compound (cas:931-40-8).

This study aimed to optimize the synthesis of valuable glycerol carbonate (GC) over calcined oil pam fuel ash derived catalyst. A surface response methodol. optimization study was conducted using the Box-Behnken optimization tool to minimize the reaction parameters and optimize GC yield and glycerol conversion. Also, the effect of intraparticle and external mass transfer resistance was conducted and the intrinsic kinetic model of the transesterification reaction was established. Overall, the transesterification temperature had significant effects on the variables of GC yield and glycerol conversion, while the catalyst loading and reaction time trivially affected the response parameters. Under optimized parameters of 80°C reaction temperature, di-Me carbonate (DMC)/glycerol molar ratio of 5, 5 wt% catalyst loading and 112 min reaction time, GC reached 95% with a desirability of 1. Theor. elucidation indicates that transesterification reaction over the catalyst was unaffected by external mass transfer resistance and intraparticle diffusion above 125μm particle size. The catalyst is heterogeneous and can be reused for five times while sustaining about 81.3% of GC yield.

Here is just a brief introduction to this compound(931-40-8)Computed Properties of C4H6O4, more information about the compound(4-(Hydroxymethyl)-1,3-dioxolan-2-one) is in the article, you can click the link below.

Reference:
Chiral Catalysts,
Chiral catalysts – SlideShare

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 2-Ethylpyrazine( cas:13925-00-3 ) is researched.Product Details of 13925-00-3.Sioriki, Eleni; Lemarcq, Valerie; Alhakim, Fauzan; Triharyogi, Harry; Tuenter, Emmy; Cazin, Catherine S. J.; Nolan, Steven P.; Pieters, Luc; Van de Walle, Davy; Dewettinck, Koen published the article 《Impact of alkalization conditions on the phytochemical content of cocoa powder and the aroma of cocoa drinks》 about this compound( cas:13925-00-3 ) in LWT–Food Science and Technology. Keywords: cocoa powder aroma drink alkalization phytochem content. Let’s learn more about this compound (cas:13925-00-3).

Alkalization is an important process in cocoa powder production that affects color and flavor. In this study, the impact of alkalization temperature (60, 70, 80, 90, 100°C), NaOH concentration (0.59, 1.17, 2.34, 3.59% weight/weight of cocoa powder) and alkalization time (1 and 10 min) on the physicochem. properties (pH, color) and phytochem. profile (theobromine, caffeine, epicatechin, catechin) of cocoa powder were investigated, while the aroma was studied on the corresponding cocoa drinks. High-performance liquid chromatog. coupled to an ultra-violet detector (HPLC-UV) was used for screening the non-volatiles and headspace solid – phase microextraction – gas chromatog. – mass spectrometry (HS-SPME-GC-MS) for the aromatic compounds Major changes of the cocoa properties occurred during the first minute of alkalization. Increase of temperature and alkali concentration generally reduced the levels of epicatechin and the lightness (L*), while the pH of the cocoa powder was affected by changing the alkali concentration On the other hand, the reddish (a*) and yellowish (b*) color component values and theobromine levels were not significantly affected by varying temperature and alkali concentration A higher temperature did not affect the concentration of the volatile compounds, while a decrease in certain chem. classes was observed by increasing the alkali concentration

Here is just a brief introduction to this compound(13925-00-3)Product Details of 13925-00-3, more information about the compound(2-Ethylpyrazine) is in the article, you can click the link below.

Reference:
Chiral Catalysts,
Chiral catalysts – SlideShare

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called New polymer protecting group in oligonucleotide synthesis. 2-Hydroxyethyl phenyl thio ether of polyethylene glycol, published in 1974, which mentions a compound: 542-58-5, mainly applied to thymidine protection polyethylene glycol, Related Products of 542-58-5.

Bis[4-(2-hydroxyethylthio)phenylamino]polyethylene glycol condensed with the thymidine nucleotide I to give ∼90% of the corresponding phosphate-protected nucleotide. The protecting group was cleaved by sequential N-chlorosuccinimide oxidation and treatment with NaOH.

Here is just a brief introduction to this compound(542-58-5)Related Products of 542-58-5, more information about the compound(2-Chloroethyl acetate) is in the article, you can click the link below.

Reference:
Chiral Catalysts,
Chiral catalysts – SlideShare

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 542-58-5, is researched, Molecular C4H7ClO2, about Effect of branching on the thermal properties of novel branched poly(4-ethyleneoxy benzoate), the main research direction is hydroxyethoxybenzoate polyester preparation branching thermal property.Formula: C4H7ClO2.

Poly(4-ethyleneoxy benzoate) (PEOB) was synthesized by the self-condensation of Et 4-(2-hydroxyethoxy)benzoate (E4HEB) under transesterification conditions. Branched PEOB was prepared by the condensation of E4HEB with an AB2 monomer, Et 3,5-bis(2-hydroxyethoxy)benzoate (EBHEB), under similar conditions. Varying amounts of branching (0-50%) were introduced into the linear polymer by changes in the composition of the comonomers in the feed. The solution viscosity of the polymers indicated that they had reasonable mol. weights; the extent of branching in these copolymers was established from their 1H NMR spectra. Differential scanning calorimetry studies indicated that, as expected, the introduction of branching drastically affected the percent crystallinity of the copolymers (as seen from their ΔHm, the enthalpy of melting), and when the extent of the incorporation of the AB2 monomer exceeded 10 mol%, the copolymers were completely amorphous. The melting temperatures of the copolymers decreased with an increase in the branching content, whereas the peak crystallization temperature in quenched (amorphous) samples followed the exactly opposite trend. The glass-transition temperatures (Tg) of the branched copolymers first decreased at low extents of branching, passed through a min., and then increased to attain the Tg of the pure hyperbranched polymer of EBHEB.

Here is just a brief introduction to this compound(542-58-5)Formula: C4H7ClO2, more information about the compound(2-Chloroethyl acetate) is in the article, you can click the link below.

Reference:
Chiral Catalysts,
Chiral catalysts – SlideShare

HPLC of Formula: 22468-26-4. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 4-Hydroxypicolinic acid, is researched, Molecular C6H5NO3, CAS is 22468-26-4, about Gas chromatography/mass spectrometry of paraquat UV-ozonation products.

The chromatog. and mass spectral properties of 13 compounds isolated from the reaction of uv and O3 on paraquat  [4685-14-7] are described. The products were extracted from the acidified reaction mixture and converted to TMS derivatives The identified products were the di-TMS ester of oxalic acid (m/z 234), the TMS ester of 4-picolinic acid (m/z 195e, the di-TMS ester of succinic acid (m/z 262e, the di-TMS derivative of N-formylglycine, 4,4′-bipyridyl (m/z 156), the tri-TMS derivative of malic acid (m/z 350), and the di-TMS derivative of a hydroxy-4-picolinic acid. Structural features and tentative identification of some of the remaining compounds are discussed. The most prominent peak on the chromatogram has a probable mol. ion at m/z 219, isomeric to the di-TMS derivative of glycine. The structures presented suggest that demethylation, ring oxidation, and fragmentation of 1 or both rings of the bipyridinium di-cation occur during uv-ozonation of paraquat.

Here is just a brief introduction to this compound(22468-26-4)HPLC of Formula: 22468-26-4, more information about the compound(4-Hydroxypicolinic acid) is in the article, you can click the link below.

Reference:
Chiral Catalysts,
Chiral catalysts – SlideShare