Month: September 2022

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

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

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

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

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

Reference of 3-(4-Aminophenoxy)aniline《Unraveling Factors Leading to High Pseudocapacitance of Redox-Active Small Aromatics on Graphene》 was published in 2019. The authors were Zhao, Yi;Wang, Xiaoxu;Wang, Na;Li, Ming;Li, Qi;Liu, Jinzhang, and the article was included in《Journal of Physical Chemistry C》. The author mentioned the following in the article:

Graphene sheets functionalized by redox-active small aromatics can exhibit enhanced capacitance because of the introduced faradaic process. However, the immense number of possible mols. for energy storage makes the selection of the appropriate ones difficult. This study combines experiment and theory to unveil factors behind the different pseudocapacitance contributions of some aromatic isomers adsorbed onto graphene, aiming to provide a guideline for computationally screening out optimal mols. for supercapacitor electrodes. Eight kinds of mols. containing amino groups are intentionally selected to functionalize N-doped graphene (NG) and their electrochem. properties are compared. The HOMO level of a mol. is found to play an important role in rendering a high pseudocapacitance. Also, remarkable efficacies from two kinds of mols., 4-aminophenol and 1,5-naphthalenediamine (1,5-NAPD), are unveiled, and the role of the amino group in charge storage is discussed. As a result, the graphene film absorbed with 1,5-NAPD mols. shows a high specific gravimetric capacitance of 877 F/g within the voltage window of 1 V, corresponding to a high areal specific capacitance of 1.14 F/cm² from the thin film with a mass loading of 1.3 mg/cm². Also, the 1,5-NAPD/NG film shows good cycling stability, achieving 105% capacitance retention after 5000 charge-discharge cycles.3-(4-Aminophenoxy)aniline (cas: 2657-87-6) were involved in the experimental procedure.

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. Reference of 3-(4-Aminophenoxy)aniline 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

Zhang, Shuai;Perveen, Saima;Ouyang, Yizhao;Xu, Liang;Yu, Tao;Zhao, Min;Wang, Linghua;Song, Peidong;Li, Pengfei published 《Design and Synthesis of Tunable Chiral 2,2′-Bipyridine Ligands: Application to the Enantioselective Nickel-Catalyzed Reductive Arylation of Aldehydes》 in 2022. The article was appeared in 《Angewandte Chemie, International Edition》. They have made some progress in their research.Safety of Dimethoxydiphenylmethane The article mentions the following:

A new class of chiral 2,2′-bipyridine ligands, SBpy, featuring minimized short-range steric hindrance and structural tunability was rationally designed and developed, and the effectiveness was demonstrated in the first highly enantioselective Ni-catalyzed addition of aryl halides to aldehydes. In comparison with known approaches using preformed aryl metallic reagents, this reaction is more step-economical and functional group tolerant. The reaction mechanism and a model of stereocontrol were proposed based on exptl. and computational results. The experimental procedure involved many compounds, such as 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. Safety 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

Shim, You-Jin;Choi, Kihang published 《Cyclic Ketals of Tartaric Acid: Simple and Tunable Reagents for the Determination of the Absolute Configuration of Primary Amines》 in 2010. The article was appeared in 《Organic Letters》. They have made some progress in their research.Quality Control of Dimethoxydiphenylmethane The article mentions the following:

2,2-Diphenyl-[1,3]dioxolane-4,5-dicarboxylic acid (DPD) and 2,2-dinaphthalen-2-yl-[1,3]dioxolane-4,5-dicarboxylic acid (DND) have been synthesized starting from di-Me tartrate. DPD and DND amides of α-chiral primary amines showed significantly different ¹H chem. shift values depending on the stereochem. of the derivatizing agent. On the basis of this chem. shift difference, the absolute configuration of amine substrates could be assigned. DND amides showed significantly larger chem. shift differences than the corresponding DPD amides allowing for a more error-free assignment. 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

Recommanded Product: 3-(4-Aminophenoxy)aniline《Kinetic study of copolymerized PMIA with ether moiety under air pyrolysis》 was published in 2020. The authors were Li, Na;Zhang, Xingke;Yu, Junrong;Wang, Yan;Zhu, Jing;Hu, Zuming, and the article was included in《Journal of Thermal Analysis and Calorimetry》. The author mentioned the following in the article:

Copolymerized poly(m-phenylene isophthalamide) (co-PMIA) was synthesized by solution polycondensation using m-phenylenediamine and isophthaloyl dichloride and 3,4′-oxydianiline (3,4′-ODA). This paper described the preparation and characterization of the copolymers from various contents 3,4′-ODA to afford co-PMIA with ideal high mol. mass. The copolymer showed excellent thermal stability with the glass transition temperature of 267°C and the onset decomposition temperature (5% mass loss) of 445°C. The thermal degradation of co-PMIA was measured with various thermal anal. techniques; the pyrolysis products were obtained and analyzed under air atm. The possible thermal decomposition mechanism of co-PMIA was discussed. The present pyrolysis was investigated using TG under air atm. at four different heating rates (5-20°C min^-1). Three different kinetic methods, the iso-conversional Ozawa-Flynn-Wall and Kissinger and Crane methods were applied on TG data of co-PMIA to calculate the kinetic parameters including activation energy, pre-exponential factor and reaction order.3-(4-Aminophenoxy)aniline (cas: 2657-87-6) were involved in the experimental procedure.

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. Recommanded Product: 3-(4-Aminophenoxy)aniline 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

Okano, Tamon;Michihashi, Tomonori;Kiji, Jitsuo published 《Acetalization of ketones and aldehydes catalyzed by lanthanoid trisulfonates》 in 1995. The article was appeared in 《Applied Organometallic Chemistry》. They have made some progress in their research.Name: Dimethoxydiphenylmethane The article mentions the following:

Lanthanoid sulfonates are good catalysts for the acetalization of aldehydes and ketones with Me orthoformate in methanol. The catalytic activity of Ln(OTf)₃ (OTf = trifluoromethanesulfonate) increases in the order of La < Sm < Gd < Er < Yb. Since sulfonates such as trifluoromethylsulfonates and (1S)-10-camphorsulfonates are more soluble in organic solvents than the chlorides, the acetalization in ether or dichloromethane and the exchange reaction of alkoxy groups between acetals and alcs. can be achieved under mild conditions. 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. Name: 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