Tag: 200-300

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

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

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

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

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

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

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

Wang, Fei;Yi, Junyi;Nishimoto, Yoshihiro;Yasuda, Makoto published 《Homologation of Alkyl Acetates, Alkyl Ethers, Acetals, and Ketals by Formal Insertion of Diazo Compounds into a Carbon-Carbon Bond》. The research results were published in《Synthesis》 in 2021.Name: Dimethoxydiphenylmethane The article conveys some information:

Homologation of alkyl acetates, alkyl ethers, acetals, and ketals was accomplished via formal insertion of diazo esters into carbon-carbon σ-bonds. The combined Lewis acid InI₃ with Me₃SiBr catalyzed the homologation of alkyl acetates and alkyl ethers. That of acetals and ketals was catalyzed solely by the use of InBr₃. The key point of the homologation mechanism is that the indium-based Lewis acids have the appropriate amount of Lewis acidity to achieve both the abstraction and release of leaving groups. The abstraction of a leaving group by an indium-based Lewis acid and the electrophilic addition of carbocation or oxonium intermediates to diazo esters followed by the rearrangement of carbon substituents provide the corresponding cation intermediates. Finally, the leaving group that is captured by the Lewis acid bonds with cation intermediates to furnish the homologated products. And Dimethoxydiphenylmethane (cas: 2235-01-0) was used in the research process.

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

Lusi, Robert F.;Sennari, Goh;Sarpong, Richmond published 《Total synthesis of nine longiborneol sesquiterpenoids using a functionalized camphor strategy》. The research results were published in《Nature Chemistry》 in 2022.Computed Properties of C15H16O2 The article conveys some information:

Natural product total synthesis inspires the development of synthesis strategies to access important classes of mols. In the 1960s, Corey and coworkers demonstrated a visionary preparation of the terpenoid longifolene, using ‘strategic bond anal.’ to craft a synthesis route. This approach proposes that efficient synthesis routes to bridged, polycyclic structures should be formulated to introduce the bulk of the target’s topol. complexity at a late stage. Subsequently, similar strategies have proved general for the syntheses of a wide variety of bridged, polycyclic mols. Here, we demonstrate that an orthogonal strategy where topol. complexity is introduced at the outset leads to the short synthesis of the longifolene-related terpenoid longiborneol. To implement this strategy, we access a bicyclo[2.2.1] starting material through scaffold remodelling of readily available (S)-carvone. We also employ a variety of late-stage C-H functionalization tactics in divergent syntheses of many longiborneol congeners. Our strategy may prove effective for the preparation of other topol. complex natural products that contain the bicyclo[2.2.1] framework. 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.Computed Properties of C15H16O2

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

Quality Control of Dimethoxydiphenylmethane《Torquoselective 6π-Electron Electrocyclic Ring Closure of 1-Azatrienes Containing Acyclic Chirality at the C-Terminus》 was published in 2006. The authors were Sydorenko, Nadiya;Hsung, Richard P.;Vera, Eymi L., and the article was included in《Organic Letters》. The author mentioned the following in the article:

Torquoselective pericyclic ring closures of 1-azatrienes that contain acyclic chirality at the C-terminus are described herein. To complete the study, the researchers used 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.Quality Control of Dimethoxydiphenylmethane

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