Month: September 2022

Crucello, Juliana;Miron, Luiz F. O.;Ferreira, Victor H. C.;Nan, He;Marques, Marcia O. M.;Ritschel, Patricia S.;Zanus, Mauro C.;Anderson, Jared L.;Poppi, Ronei J.;Hantao, Leandro W. published 《Characterization of the aroma profile of novel Brazilian wines by solid-phase microextraction using polymeric ionic liquid sorbent coatings》 in 2018. The article was appeared in 《Analytical and Bioanalytical Chemistry》. They have made some progress in their research.Related Products of 2235-01-0 The article mentions the following:

In this study, a series of polymeric ionic liquid (PIL) sorbent coatings is evaluated for the extraction of polar volatile organic compounds (VOCs) from Brazilian wines using headspace solid-phase microextraction (HS-SPME), including samples from ‘Isabella’ and ‘BRS Magna’ cultivars-the latter was recently introduced by the Brazilian Agricultural Research Corporation – National Grape & Wine Research Center. The structurally tuned SPME coatings were compared to the com. SPME phases, namely poly(acrylate) (PA) and divinylbenzene/carboxen/poly(dimethylsiloxane) (DVB/CAR/PDMS). The separation, detection and identification of the aroma profiles were obtained using comprehensive two-dimensional gas chromatog. mass spectrometry (GC×GC-MS). The best performing PIL-based SPME fiber, namely 1-hexadecyl-3-vinylimidazolium bis[(trifluoromethyl)sulfonyl]imide with 1,12-di(3-vinylimidazolium)dodecane dibis[(trifluoromethyl)sulfonyl]imide incorporated cross-linker supported on an elastic nitinol wire, exhibited superior performance to DVB/CAR/PDMS regarding the average number of extracted peaks and extracted more polar analytes providing addnl. insight into the aroma profile of ‘BRS Magna’ wines. Four batches of wine were evaluated, namely ‘Isabella’ and ‘BRS Magna’ vintages 2015 and 2016, using highly selective PIL-based SPME coatings and enabled the detection of 350+ peaks. Furthermore, this is the first report evaluating the aroma of ‘BRS Magna’ wines. A hybrid approach that combined pixel-based Fisher ratio and peak table-based data comparison was used for data handling. This proof-of-concept experiment provided reliable and statistically valid distinction of wines that may guide regulation agencies to create high sample throughput protocols to screen wines exported by Brazilian vintners. [Figure not available: see fulltext.]. 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.Related Products of 2235-01-0

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

Tseng, I.-Hsiang;Li, Jheng-Jia;Chang, Po-Ya published 《Mimosa Pudica Leaf-Like Rapid Movement and Actuation of Organosoluble Polyimide Blending with Sulfonated Polyaniline》 in 2017. The article was appeared in 《Advanced Materials Interfaces》. They have made some progress in their research.Electric Literature of C12H12N2O The article mentions the following:

Like the thigmonastic responses of the leaves of Mimosa pudica, the curling of organosol. and free-standing polyimide (PI) films under the stimuli of fingertip-touching or air-blowing is discovered for the first time. The authors discover that the PI films at the dry status can rapidly and reversibly attract and release water mols. at the interface of the thin film in response to the changes of environmental humidity. The moisture-triggered heterogeneous deformation across the film leads to self-curling of PI films. With the blending of suitable amounts of sulfonated-polyaniline (PANI-S) to the PI matrix, the resultant PANI-S/PI film can more effectively breath water from the air and simultaneously create more significant deformation and faster recovery. With the suitable designed patterns on the film, it can serve a highly sensitive and reliable actuator to grasp and release subjects as well as to fold into 3D structures, and to roll like a tank tread by providing trace moisture gradients. This robust PANI-S/PI film can be cast into any shape or coated on various substrates and thus is a promising material for smart delivery systems in industrial applications.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 lack the hydroxyl groups of alcohols. Without the strongly polarized O―H bond, ether molecules cannot engage in hydrogen bonding with each other. Electric Literature of C12H12N2OEthers 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

Leonard, Nicholas M.;Oswald, Matthew C.;Freiberg, Derek A.;Nattier, Bryce A.;Smith, Russell C.;Mohan, Ram S. published 《A Simple and Versatile Method for the Synthesis of Acetals from Aldehydes and Ketones Using Bismuth Triflate》 in 2002. The article was appeared in 《Journal of Organic Chemistry》. They have made some progress in their research.Product Details of 2235-01-0 The article mentions the following:

Acetals are obtained in good yields by treatment of aldehydes and ketones with trialkyl orthoformates and the corresponding alc. in the presence of 0.1 mol % Bi(OTf)₃·4H₂O. A simple procedure for the formation of acetals of diaryl ketones has also been developed. The conversion of carbonyl compounds to the corresponding 1,3-dioxolanes using ethylene glycol is also catalyzed by Bi(OTf)₃·4H₂O (1 mol %). Two methods, both of which avoid the use of benzene, have been developed. 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. Product Details of 2235-01-0 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

Zhou, Haoran;Wang, Dexin;Qu, Chunyan;Liu, Changwei;Mao, Shanshan published 《Preparation and characterization of a copper@polyimide core-shell structure via an in situ induction/imidization route》. The research results were published in《High Performance Polymers》 in 2017.COA of Formula: C12H12N2O The article conveys some information:

Based on the combination of an in situ induction and imidization method for improving the interface bonding of an inorganic material and a polymer, copper/polyimide (Cu/PI) core-shell composite particles have been successfully prepared from poly(amic acid) ammonium salts (PAAS) and a Cu complex via a simple solvothermal process. The structures and the morphologies of the samples were characterized by XPS, X-ray diffraction, SEM and transmission electron microscopy (TEM), resp. It was found that PAAS formed PI via a thermal imidization and subsequently precipitated in the solvent. Through crystallization induction, it then successfully coated on the surface of the formed Cu particles. Based on thermo gravimetric analyses curves and due to no Cu oxidation reactions taking place in the core coated with high-temperature-resistant PI, the weight increase was determined to be 106.4%, instead of up to 124.0% in samples consisting of pure Cu. 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. COA of Formula: C12H12N2O 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

Banerjee, Isita;Ghosh, Keshab Ch;Oheix, Emmanuel;Jean, Marion;Naubron, Jean-Valere;Reglier, Marius;Iranzo, Olga;Sinha, Surajit published 《Synthesis of protected 3,4- and 2,3-dimercaptophenylalanines as building blocks for Fmoc-peptide synthesis and incorporation of the 3,4-analog in a decapeptide using solid-phase synthesis》 in 2021. The article was appeared in 《Journal of Organic Chemistry》. They have made some progress in their research.Application of 2235-01-0 The article mentions the following:

3,4-Dimercaptophenylalanines and 2,3-dimercaptophenylalanines have been synthesized for the first time by nucleophilic substitution of a protected aminomalonate on 3,4- and 2,3-dimercaptobenzyl bromide derivatives The dithiol functions were protected as thioketals, and the key precursors, diphenylthioketal-protected dimercaptobenzyl bromides, were synthesized via two distinct routes from either dihydroxy benzoates or toluene-3,4-dithiol. Racemic mixtures of the fully protected amino acids were separated by chiral HPLC into the corresponding enantiomers. The absolute configuration of both 3,4- and 2,3-analogs could be assigned based on X-ray crystallog. and VCD/DFT measurements. Thioketal groups were deprotected upon reaction with mercury oxide and aqueous tetrafluoroboric acid followed by treatment with H₂S gas under an argon atm. to obtain the corresponding dimercapto amino acids. The optically pure L-Fmoc-protected (Fmoc = 9-fluorenylmethoxycarbonyl) 3,4-analog (S enantiomer) was successfully incorporated into a decapeptide using standard solid-phase peptide synthesis. Therefore, dithiolene-functionalized peptides are now accessible from a simple synthetic procedure, and this should afford new mol. tools for research into the catalysis, diagnostic, and nanotechnol. fields.Dimethoxydiphenylmethane (cas: 2235-01-0) were involved in the experimental procedure.

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. Application of 2235-01-0 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

Electric Literature of C12H12N2OIn 2015, Qu, Chunyan;Liu, Changwei;Zhou, Haoran;Yu, Weimiao;Wang, Dezhi;Wang, Dexin published 《One-step synthesis of PI@Fe₃O₄ composite microspheres and practical applications in Cu(II) ion adsorption》. 《RSC Advances》published the findings. The article contains the following contents:

Polyimide(PI)@magnetite(Fe₃O₄) composite microspheres have been successfully synthesized from poly(amic acid) triethylamine salts (PAAS) and Fe(III) ions by a facile one-step solvothermal process. Furthermore, the formation mechanism of the PI@Fe₃O₄ composite microspheres has been investigated. The morphol. and structure of the samples were both characterized by SEM, transmission electron microscopy (TEM), X-ray diffraction (XRD) and IR spectroscopy (IR). The results obtained show that the surface of magnetite could be successfully coated with polyimide and the coating could permeate throughout the crystals via a self-assembly process. The size of the composite microspheres was found to increase upon increasing the concentration of PAAS. The thermal properties of the composite microspheres were studied via thermogravimetric anal. (TGA) and the magnetic properties were determined by a vibrating sample magnetometer (VSM). Even though the saturation magnetization of the PI@Fe₃O₄ composite microspheres is lower than that of pure Fe₃O₄, the microspheres coated with PI exhibit an increased stability. In addition, basic hydrolysis of the composite microspheres has been carried out and the Cu(II)-adsorption properties of the composite microspheres before and after hydrolysis have been investigated. In doing so, it could be determined that the adsorption capacity of hydrolyzed composite microspheres increases from 5.84 mg g^-1 to 24.63 mg g^-1. 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. Electric Literature of C12H12N2O 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

Hasegawa, Masatoshi;Hirano, Daiki;Fujii, Mari;Haga, Misako;Takezawa, Eiichiro;Yamaguchi, Shinya;Ishikawa, Atsushi;Kagayama, Takashi published 《Solution-processable colorless polyimides derived from hydrogenated pyromellitic dianhydride with controlled steric structure》 in 2013. The article was appeared in 《Journal of Polymer Science, Part A: Polymer Chemistry》. They have made some progress in their research.Formula: C12H12N2O The article mentions the following:

This work presents novel colorless polyimides (PIs) derived from 1R,2S,4S,5R-cyclohexanetetracarboxylic dianhydride (H”-PMDA). Isomer effects were also discussed by comparing with PI systems derived from conventional hydrogenated pyromellitic dianhydride, i.e., 1S,2R,4S,5R-cyclohexanetetracarboxylic dianhydride (H-PMDA). H”-PMDA was much more reactive with various diamines than H-PMDA, and the former led to PI precursors with much higher mol. weights The results can be explained from the quite different steric structures of these isomers. The thermally imidized H”-PMDA-based films were colorless regardless of diamines because of inhibited charge-transfer interaction. In particular, the H”-PMDA/4,4′-oxydianiline system simultaneously achieved a very high T_g exceeding 300 °C, high toughness (elongation at break > 70%), and good solution processability. In contrast, the H-PMDA-based counterparts were essentially insoluble The outstanding solubility of the former probably results from disturbed chain stacking by its nonplanar steric structure. An advantage of chem. imidization process is also proposed. In some cases, a copolymerization approach with an aromatic tetracarboxylic dianhydride was effective to improve the thermal expansion property. The results suggest that the H”-PMDA-based PI systems can be promising candidates for novel high-temperature plastic substrate materials in electronic paper displays. A potential application as optical compensation film materials in liquid crystal displays (LCD) is also proposed in this work. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012. And 3-(4-Aminophenoxy)aniline (cas: 2657-87-6) was used in the research process.

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. Formula: C12H12N2OEthers 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

Iwashita, Kenichi;Suzuki, Ryousuke;Katoh, Hironobu;Ohta, Yoshihiro;Yokozawa, Tsutomu published 《Novel photoresist using photodeprotectable N-alkoxybenzyl aromatic polyamide》 in 2018. The article was appeared in 《Journal of Photopolymer Science and Technology》. They have made some progress in their research.Electric Literature of C12H12N2O The article mentions the following:

Photodeprotection of N-octyloxybenzyl aromatic polyamide film containing photo acid generator (PAG) was investigated. The photodeprotection was proceeded well under UV irradiation (365 nm, 5 J/cm²), followed by heating at 130 °C for 15 min in the presence of 25 wt% of PAG. Line pattern of 30 to 20 μm on Si wafer was obtained from the photosensitive film after dipping into acetone. It turned out that N-alkoxybenzyl aromatic polyamides serve as a new photosensitive material in the presence of PAG.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 lack the hydroxyl groups of alcohols. Without the strongly polarized O―H bond, ether molecules cannot engage in hydrogen bonding with each other. Electric Literature of C12H12N2OEthers 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

Related Products of 2235-01-0《A concise diastereoselective approach to (+)-dexoxadrol, (-)-epi-dexoxadrol, (-)-conhydrine and (+)-lentiginosine from (-)-pipecolinic acid》 was published in 2013. The authors were Bhat, Chinmay;Tilve, Santosh G., and the article was included in《Tetrahedron》. The author mentioned the following in the article:

A new diastereoselective pathway for the total synthesis of (+)-dexoxadrol (I), first asym. synthesis of (-)-epi-dexoxadrol (II) and formal synthesis of (-)-β- and (+)-α-conhydrine III (R = OH, R¹ = H; R = H, R¹ = OH, resp.) and (+)-lentiginosine (IV) is presented using com. available (-)-pipecolinic acid. The key reactions utilized are Sharpless asym. dihydroxylation and Wittig reaction. The paper further describes the study of the effect of protecting groups on dihydroxylation of a terminal olefin in piperidine ring system.Dimethoxydiphenylmethane (cas: 2235-01-0) were involved in the experimental procedure.

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. Related Products of 2235-01-0 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, Chen;Zhuang, Dao-Min;Li, Jia;Chen, Si-Yuan;Du, Xiao-Long;Wang, Jian-Yong;Li, Jing-Yun;Jiang, Biao;Yao, Jian-Hua published 《Diverse reactivity in microwave-promoted catalyst-free coupling of substituted anilines with ethyl trifluoropyruvate and biological evaluation》. The research results were published in《Organic & Biomolecular Chemistry》 in 2013.Quality Control of 3-(4-Aminophenoxy)aniline The article conveys some information:

Diverse reactivity by coupling of substituted anilines with Et trifluoropyruvate was developed under microwave irradiation without catalysts to generate 3-trifluoromethyl-3-hydroxyoxindoles, aromatic hydroxy trifluoromethyl esters, and 1,2-dicarbonyl compounds in a fast and efficient manner. The plausible mechanism for obtaining different products was proposed. Furthermore, the anti-HIV activity of aromatic hydroxy trifluoromethyl esters was first reported. The best inhibitory activity against wild-type HIV-1 IIIB was exemplified by trifluoromethyloxindole I with an IC₅₀ = 5.8 μM, which also displayed potential activity against Y181C mutant virus with an IC₅₀ = 7.5 μM. More significantly, the activities of oxindoles I and II to inhibit K103N/Y181C double mutant HIV-1 reverse transcriptase (RT) are probably similar to that of the second-generation nonnucleoside inhibitor HBY 097 by docking calculation 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. Quality Control of 3-(4-Aminophenoxy)anilineEthers 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