Tag: 200-300

Reference of DimethoxydiphenylmethaneIn 2007, Dei, Silvia;Bellucci, Cristina;Buccioni, Michela;Ferraroni, Marta;Guandalini, Luca;Manetti, Dina;Martini, Elisabetta;Marucci, Gabriella;Matucci, Rosanna;Nesi, Marta;Romanelli, Maria Novella;Scapecchi, Serena;Teodori, Elisabetta published 《Synthesis, Affinity Profile, and Functional Activity of Muscarinic Antagonists with a 1-Methyl-2-(2,2-alkylaryl-1,3-oxathiolan-5-yl)pyrrolidine Structure》. 《Journal of Medicinal Chemistry》published the findings. The article contains the following contents:

Starting from a previously studied muscarinic ligand, characterized by a 1,3-oxathiolane nucleus, a series of muscarinic antagonists were designed by increasing the stereochem. complexity of the mols. A small library of enantiomeric and diastereomeric 2,2-diphenyl- and 2-cyclohexyl-2-Ph substituted compounds, e.g., I, was thus obtained. All the tested compounds show a high affinity toward cloned human muscarinic hm1-hm5 receptors expressed in CHO cells and a good antagonistic activity on functional assays, with a modest selectivity on rabbit vas deferens. To complete the study, the researchers used Dimethoxydiphenylmethane (cas: 2235-01-0) .

Dimethoxydiphenylmethane is one of ethers-buliding-blocks. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. Reference of Dimethoxydiphenylmethane The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.

Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Computed Properties of C15H16O2《Simple and efficient MW-assisted cleavage of acetals and ketals in pure water》 was published in 2007. The authors were Procopio, Antonio;Gaspari, Marco;Nardi, Monica;Oliverio, Manuela;Tagarelli, Antonio;Sindona, Giovanni, and the article was included in《Tetrahedron Letters》. The author mentioned the following in the article:

Simple and efficient microwave-assisted cleavage of acetals and ketals is proposed in de-ionized water and in a very short time. And Dimethoxydiphenylmethane (cas: 2235-01-0) was used in the research process.

The unique properties of ethers (i.e., that they are strongly polar, with nonbonding electron pairs but no hydroxyl group) enhance the formation and use of many reagents. For example, Grignard reagents cannot form unless an ether is present to share its lone pair of electrons with the magnesium atom.Computed Properties of C15H16O2

Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Dewan, Sharwan K.;Singh, Ravinder published 《Microwave assisted acetalization of carbonyl compounds with methanol using Na₂SO₄ (anhydrous) and MgSO₄ (anhydrous) as catalysts》 in 2002. The article was appeared in 《Oriental Journal of Chemistry》. They have made some progress in their research.Name: Dimethoxydiphenylmethane The article mentions the following:

The synthesis of acetals of carbonyl compounds with MeOH was carried out under microwave irradiation in presence of Na₂SO₄ (anhydrous) (95-99% yield) and MgSO₄ (anhydrous) (94-98% yield) in a few minutes. The experimental procedure involved many compounds, such as Dimethoxydiphenylmethane (cas: 2235-01-0) .

For example, the most common synthesis of ethers involves the attack of an alkoxide ion on an alkyl halide. This method is called Williamson ether synthesis.Name: Dimethoxydiphenylmethane

Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Category: ethers-buliding-blocks《Deprotection of acetals and ketals in a colloidal suspension generated by sodium tetrakis(3,5-trifluoromethylphenyl)borate in water》 was published in 2007. The authors were Chang, Chih-Ching;Liao, Bei-Sih;Liu, Shiuh-Tzung, and the article was included in《Synlett》. The author mentioned the following in the article:

Deprotection of acetals and ketals can be achieved by using sodium tetrakis(3,5-trifluoromethylphenyl)borate as the catalyst in water at 30 °C. For example, a quant. conversion of 2-phenyl-1,3-dioxolane into benzaldehyde was accomplished within five minutes by using this sodium salt (0.1 mol%) in water. The experimental procedure involved many compounds, such as Dimethoxydiphenylmethane (cas: 2235-01-0) .

For example, the most common synthesis of ethers involves the attack of an alkoxide ion on an alkyl halide. This method is called Williamson ether synthesis.Category: ethers-buliding-blocks

Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Thomas, Bejoy;Prathapan, S.;Sugunan, S. published 《Effect of pore size on the catalytic activities of K-10 clay and H-zeolites for the acetalization of ketones with methanol》. The research results were published in《Applied Catalysis, A: General》 in 2004.Quality Control of Dimethoxydiphenylmethane The article conveys some information:

One-pot acetalizations of cyclohexanone, acetophenone and benzophenone were carried out using methanol over H-montmorillonite clay (a mesoporous material), silica, alumina, and different zeolites such as HFAU-Y, HBeta, H-ZSM-5, and H-mordenite. In all the cases, a single product-the corresponding dimethylacetal-was obtained in high yields. Hemiacetal formation was not observed with any catalyst. A comparison of catalytic activity indicated that montmorillonite K-10 is the most active catalyst for the reaction. As evidenced by the reaction time studies, the catalyst decay is greater over the zeolite catalyst than over the clay. And Dimethoxydiphenylmethane (cas: 2235-01-0) was used in the research process.

Dimethoxydiphenylmethane is one of ethers-buliding-blocks. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. Quality Control of Dimethoxydiphenylmethane The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.

Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Kwon, Young Seung;Park, Gyu-Tae;Lee, Ji-Su;Hwang, Gyu-Hyun;Jeong, Young Gyu published 《Poly(Ether Amide)-Derived, Nitrogen Self-Doped, and Interfused Carbon Nanofibers as Free-Standing Supercapacitor Electrode Materials》 in 2021. The article was appeared in 《ACS Applied Energy Materials》. They have made some progress in their research.Related Products of 2657-87-6 The article mentions the following:

For free-standing and self-doped electrode materials of energy storage devices, in this study, we investigate the microstructures and electrochem. properties of aromatic poly(ether amide) (PEA)-derived carbon nanofibers (CNFs), which are manufactured by electrospinning mixed solutions of PEA and poly(vinyl pyrrolidone) (PVP) at three different compositions and carbonization of the as-spun nanofibers at 1000°C. The SEM, energy dispersive spectroscopy, Raman spectroscopy, and elemental analyses reveal that PEA-derived CNFs have a unique interfused network structure with nitrogen self-doped and quasi-ordered graphitic features. Accordingly, a high apparent elec. conductivity of 3.72-7.79 S/cm is attained for the CNFs. The cyclic voltammetry and galvanostatic charge-discharge measurements confirm that PEA-derived CNFs have excellent electrochem. properties in terms of a specific capacitance of ∼249.0 F/g at 1.0 A/g, power d. of 10,000-1,000 W/kg, energy d. of 30.1-69.1 Wh/kg, capacitance retention of ∼79%, and Coulombic efficiency of ∼92% after 3000 cycle tests. These results indicate that PEA-derived CNFs can be used as highly stable, self-supporting, and doping-free electrode materials for high-performance energy storage devices. To complete the study, the researchers used 3-(4-Aminophenoxy)aniline (cas: 2657-87-6) .

3-(4-Aminophenoxy)aniline is one of ethers-buliding-blocks. Ethers lack the hydroxyl groups of alcohols. Without the strongly polarized O―H bond, ether molecules cannot engage in hydrogen bonding with each other. Related Products of 2657-87-6Ethers do have nonbonding electron pairs on their oxygen atoms, however, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds.

Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Hsieh, Ching-Wen;Li, Bo-Xian;Suen, Shing-Yi published 《Alicyclic Polyimide/SiO2 Mixed Matrix Membranes for Water/n-Butanol Pervaporation》. The research results were published in《Membranes (Basel, Switzerland)》 in 2021.HPLC of Formula: 2657-87-6 The article conveys some information:

Alicyclic polyimides (PIs) have excellent properties in solubility, mech. strength, thermal property, etc. This study developed two types of alicyclic PI-based mixed matrix membranes (MMMs) for water/n-butanol pervaporation application, which have never been investigated previously. The fillers were hydrophilic SiO₂ nanoparticles. The synthesized PI was mixed with SiO₂ nanoparticles in DMAc to make the casting solution, and a liquid film was formed over PET substrate using doctor blade. A dense MMM was fabricated at 80°C and further treated via multi-stage curing (100-170°C). The prepared membranes were characterized by FTIR, TGA, FE-SEM, water contact angle, and solvent swelling. The trends of pure solvent swelling effects agree well with the water contact angle results. Moreover, the pervaporation efficiencies of alicyclic PI/SiO₂ MMMs for 85 wt% n-butanol aqueous solution at 40°C were investigated. The results showed that BCDA-3,4′-ODA/SiO2 MMMs had a larger permeation flux and higher separation factor than BCDA-1,3,3-APB/SiO2 MMMs. For both types of MMMs, the separation factor increased first and then decreased, with increasing SiO2 loading. Based on the PSI performance, the optimal SiO2 content was 0.5 wt% for BCDA-3,4′-ODA/SiO2 MMMs and 5 wt% for BCDA-1,3,3-APB/SiO2 MMMs. The overall separation efficiency of BCDA-3,4′-ODA-based membranes was 10-30-fold higher. To complete the study, the researchers used 3-(4-Aminophenoxy)aniline (cas: 2657-87-6) .

3-(4-Aminophenoxy)aniline is one of ethers-buliding-blocks. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. HPLC of Formula: 2657-87-6 The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.

Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Chen, Yung-Chung;Hsiao, Sheng-Huei;Wu, Cheng-Hsin published 《Thermally stable and organosoluble poly(amide-imide)s based on the imide ring-preformed dicarboxylic acids derived from 3,4′-oxydianiline with trimellitic anhydride and 6FDA》 in 2017. The article was appeared in 《Journal of Macromolecular Science, Part A: Pure and Applied Chemistry》. They have made some progress in their research.Product Details of 2657-87-6 The article mentions the following:

A diimide-dicarboxylic acid (DIDA) was prepared from the condensation reaction of trimellitic anhydride (TMA) and 3,4′-oxydianiline (3,4′-ODA) in a 2:1 molar ratio, and another new tetraimide-dicarboxylic acid (TIDA) was synthesized by condensation from 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA), TMA, and 3,4′-ODA in a 1:2:2 molar ratio. Two series of aromatic poly(amide-imide)s (PAI) and were synthesized by Yamazaki phosphorylation polyamidation reactions of DIDA and TIDA, resp., with various aromatic diamines. Due to highly random segmental sequence for both series in the polymer chain and the incorporation of 6FDA moieties for the series, all the polymers were readily soluble in many organic solvents and could be casted into transparent, flexible, and tough films with good mech. properties. Glass-transition temperature (T_gs) of the series and series were recorded in the range of 242-274°C and 264-295°C. In addition, almost all the polymers showed 10% weight loss temperatures higher than 500°C under a nitrogen or an air atm. To complete the study, the researchers used 3-(4-Aminophenoxy)aniline (cas: 2657-87-6) .

3-(4-Aminophenoxy)aniline is one of ethers-buliding-blocks. Ethers lack the hydroxyl groups of alcohols. Without the strongly polarized O―H bond, ether molecules cannot engage in hydrogen bonding with each other. Product Details of 2657-87-6Ethers do have nonbonding electron pairs on their oxygen atoms, however, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds.

Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Synthetic Route of C15H16O2《Improved Benson Increments for the Estimation of Standard Enthalpies of Formation and Enthalpies of Vaporization of Alkyl Ethers, Acetals, Ketals, and Ortho Esters》 was published in 2002. The authors were Verevkin, Sergey P., and the article was included in《Journal of Chemical and Engineering Data》. The author mentioned the following in the article:

This work was undertaken for the evaluation and revision of group-additivity values necessary for predicting standard enthalpies of formation and enthalpies of vaporization of ethers, acetals, ketals, and ortho esters by means of Benson’s group-additivity methodol. The database on the standard molar enthalpies of vaporization ΔlgH_m⁰ has been extended with measurements on several acetals, ketals, and ortho esters using the transpiration method. The standard molar enthalpies of formation Δ_fH_m⁰ (g, 298.15K) of alkyl ethers, acetals, ketals, and ortho esters were derived using the data for the Δ_fH_m⁰(l or cr, 298.15K) from the literature and the present results for the enthalpies of vaporization or sublimation. The current database of exptl. data for enthalpies of formation and enthalpies of vaporization at 298.15 K have been used to reevaluate the values of the Benson’s increments for of alkyl ethers, acetals, ketals, and ortho esters. The group-additivity parameters and strain corrections useful in the application of the Benson’s correlation are presented in tabular form, together with a description of their evaluation. To complete the study, the researchers used Dimethoxydiphenylmethane (cas: 2235-01-0) .

The unique properties of ethers (i.e., that they are strongly polar, with nonbonding electron pairs but no hydroxyl group) enhance the formation and use of many reagents. For example, Grignard reagents cannot form unless an ether is present to share its lone pair of electrons with the magnesium atom.Synthetic Route of C15H16O2

Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Thomas, Bejoy;Prathapan, Sreedharan;Sugunan, Sankaran published 《Synthesis of dimethyl acetal of ketones: design of solid acid catalysts for one-pot acetalization reaction》. The research results were published in《Microporous and Mesoporous Materials》 in 2005.Quality Control of Dimethoxydiphenylmethane The article conveys some information:

The synthesis of di-Me acetals of carbonyl compounds such as cyclohexanone, acetophenone, and benzophenone has successfully been carried out by the reaction between ketones and methanol using different solid acid catalysts. The strong influence of the textural properties of the catalysts such as acid amount and adsorption properties (surface area and pore volume) determine the catalytic activity. The mol. size of the reactants and products determine the acetalization ability of a particular ketone. The hydrophobicity of the various rare earth exchanged Mg-Y zeolites, K-10 montmorillonite clay, and cerium exchanged montmorillonite (which shows maximum activity) is more determinant than the number of active sites present on the catalyst. The optimum number of acidic sites as well as dehydrating ability of Ce³⁺-montmorillonite and K-10 montmorillonite clays and various rare earth exchanged Mg-Y zeolites seem to work well in shifting the equilibrium to the product side. To complete the study, the researchers used Dimethoxydiphenylmethane (cas: 2235-01-0) .

Dimethoxydiphenylmethane is one of ethers-buliding-blocks. Ethers feature bent C–O–C linkages. In dimethyl ether, the bond angle is 111° and C–O distances are 141 pm. The barrier to rotation about the C–O bonds is low. Quality Control of Dimethoxydiphenylmethane The bonding of oxygen in ethers, alcohols, and water is similar. In the language of valence bond theory, the hybridization at oxygen is sp3.

Reference:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem