Category: ethers-buliding-blocks

Sulu, Mustafa;Venanzi, Luigi M. published 《Acetalization and transacetalization reactions catalyzed by ruthenium, rhodium, and iridium complexes with {2-[{Bis[3-(trifluoromethyl)phenyl]phosphino}methyl]-2-methylpropane-1,3-diyl}bis[bis[3-(trifluoromethyl)phenyl]phosphine] (MeC[CH₂P(m-CF₃C₆H₄)₂]₃)》 in 2001. The article was appeared in 《Helvetica Chimica Acta》. They have made some progress in their research.SDS of cas: 2235-01-0 The article mentions the following:

The complexes [RhCl(_3-n)(MeCN)_n(CF₃triphos)](CF₃SO₃)_n (n = 1 or 2; CF₃triphos = MeC[CH₂P(m-CF₃C₆H₄)₂]₃) and [M(MeCN)₃ (CF₃triphos)](CF₃SO₃)_n (M = Ru, n = 2; M = Ir, n = 3) are catalyst precursors for some typical acetalization and transacetalization reactions. The activity of these complexes is higher than those of the corresponding species containing the parent ligand MeC[CH₂P(C₆H₅)₂]₃(Htriphos). Also the complexes [MCl₃(tripod)] (tripod = Htriphos and CF₃triphos) are active catalysts for the above reactions. The complex [RhCl₂(MeCN)(CF₃triphos)](CF₃SO₃) catalyzes the acetalization of benzophenone. 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.SDS of cas: 2235-01-0

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

Srikrishna, A.;Sattigeri, J. A.;Viswajanani, R.;Yelamaggad, C. V. published 《A simple and convenient one step method for the reductive deoxygenation of aryl ketones to hydrocarbons》 in 1995. The article was appeared in 《Synlett》. They have made some progress in their research.Electric Literature of C15H16O2 The article mentions the following:

A one step, clean and efficient, conversion of arylaldehydes, ketones and ketals into the corresponding hydrocarbons using ionic hydrogenatin conditions employing NaBH₃CN in the presence of 2-3 equiv of BF₃.OEt₂ is described. NaBH₃CN was added to 2,5,8-trimethyl-7-methoxy-1-tetralone and BF₃.OEt₂ in THF to give the hydrocarbon I. 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. Electric Literature of C15H16O2 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, Di;Cao, Fu-Rong;Lu, Guangying;Ren, Jiangmeng;Zeng, Bu-Bing published 《Practical acetalization and transacetalization of carbonyl compounds catalyzed by recyclable PVP-I》. The research results were published in《Tetrahedron》 in 2021.HPLC of Formula: 2235-01-0 The article conveys some information:

A novel PVP-I catalyzed acetalization/transacetalization of carbonyl compounds, e.g., 9-anthracenecarboxaldehyde has been developed processing with a mild and easy handling fashion. Different types of acyclic and cyclic acetals, e.g., 9-(dimethoxymethyl)anthracene were prepared from carbonyl compounds or their acetals successfully. Further applications of newly developed catalytic combination were testified. This protocol featured with simplicity of operation, mild reaction condition, short reaction time, recyclable of catalyst and broad substrates scope with excellent yields. The experimental procedure involved many compounds, such as 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.HPLC of Formula: 2235-01-0

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

Quality Control of Dimethoxydiphenylmethane《A Catalytic Tethering Strategy: Simple Aldehydes Catalyze Intermolecular Alkene Hydroaminations》 was published in 2011. The authors were MacDonald, Melissa J.;Schipper, Derek J.;Ng, Peter J.;Moran, Joseph;Beauchemin, Andre M., and the article was included in《Journal of the American Chemical Society》. The author mentioned the following in the article:

Herein a catalytic tethering strategy in which simple aldehyde precatalysts enable, through temporary intramolecularity, room-temperature intermol. hydroamination reactivity and the synthesis of vicinal N-hydroxy diamines R¹NHCHR²CHMeNR³OH (R¹ = H, Me, H₂C:CHCH₂, PhCH₂; R² = H, Me; R³ = EtCHMe, cyclohexyl, PhCH₂, 2-HOC₆H₄CH₂, 4-MeOC₆H₄CH₂) is described. The catalyst allows the formation of a mixed aminal from an allylic amine R¹NHCHR²CH:CH₂ and a hydroxylamine R³NHOH, resulting in a facile intramol. hydroamination event. The promising enantioselectivities obtained with a chiral aldehyde also highlight the potential of this catalytic tethering approach in asym. catalysis and demonstrate that efficient enantioinduction relying only on temporary intramolecularity is possible. 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.Quality Control of Dimethoxydiphenylmethane

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

Electric Literature of C12H12N2O《Fine-bubble-based strategy for the palladium-catalyzed hydrogenation of nitro groups: Measurement of ultrafine bubbles in organic solvents》 was published in 2017. The authors were Mase, Nobuyuki;Nishina, Yuki;Isomura, Shogo;Sato, Kohei;Narumi, Tetsuo;Watanabe, Naoharu, and the article was included in《Synlett》. The author mentioned the following in the article:

Fine bubbles of hydrogen were employed as a new reaction medium for the autoclave-free gas-liquid-solid multiphase hydrogenation of nitro groups on a multigram scale. Furthermore, ultrafine bubbles were examined by nanoparticle-tracking anal. in organic solvents. 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. 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

Yu, Ping;Zhang, Yan-li;Yang, Xue;Pan, Li-jing;Dai, Zhi-yao;Xue, Min-zhao;Liu, Yan-gang;Wang, Wei published 《Synthesis and characterization of asymmetric bismaleimide oligomers with improved processability and thermal/mechanical properties》 in 2019. The article was appeared in 《Polymer Engineering & Science》. They have made some progress in their research.Application In Synthesis of 3-(4-Aminophenoxy)aniline The article mentions the following:

Novel asym. bismaleimide (BMI) oligomers with different mol. weights and dianhydrides were designed and synthesized by 3,4′-oxydianiline (3,4′-ODA), 2,3,3′,4′-oxydiphthalic dianhydride (a-ODPA), and 2,3,3′,4′-biphenyltetracarboxylic dianhydride (a-BPDA). The chem. structures of BMI oligomers were confirmed by fourier transform IR spectrometry and gel permeation chromatog. X-ray diffraction exhibited broad peaks, suggesting amorphous structures. Heat flow curves of oligomers measured by differential scanning calorimeter displayed wide processing window due to low glass transition temperatures (T_g). BMI oligomers exhibited high solubility in common organic solvents. Particularly, the OD-BMI-1 oligomer exhibited excellent solubility of more than 50 wt% in DMAc solvent. T_g value and min. complex viscosity of OD-BMI-1 oligomer were only 121 °C and 8.1 Pa · s, resp. The cured BMI resins possess high thermal and thermal-oxidative stability. The T_g and the temperature of 5% weight loss in nitrogen were above 256 and 449 °C, resp., and the residual weight percentages at 800 °C were all >49%. Moreover, films made of BMI resins exhibited excellent mech. properties flexibility, as confirmed by photograph and DMA results of films. The elongation at break of the prepared films was found to be high (almost >9.6%). 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 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 In Synthesis 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

Quality Control of 3-(4-Aminophenoxy)anilineIn 2015, Liu, Changwei;Qu, Chunyan;Wang, Dezhi;Feng, Hao;Liu, Ping;Zhang, Yang published 《Preparation and characterization of magnetic polyimide composite films copolymerized with aminophthalocyanine-coated Fe₃O₄ nanocrystals》. 《Journal of Materials Science: Materials in Electronics》published the findings. The article contains the following contents:

Iron-aminophthalocyanine-coated Fe₃O₄ hybrid nanospheres were synthesized by a one-step solvent-thermal method and followed by a catalytic hydrogenation route. To effectively utilize the excellent magnetic sensitivity of the functional aminophthalocyanine/Fe₃O₄ hybrid nanospheres, we have developed a novel series of flexible Fe₃O₄@polyimide (PI) composite films, which was prepared with various Fe₃O₄/FePc-NH₂ nanoparticle loadings (7, 15, 27 and 40 wt%). All of the flexible thin films have uniform morphol. without any agglomeration, which had been confirmed by the anal. of scanning electron microscope images. The above composite films, which have the higher saturation magnetization compared with that of the corresponding pure Fe₃O₄/PI films, illustrate that the excellent compatibility and homogeneous dispersion of the amine-coated Fe₃O₄ particles in the PI matrix based on the strong chemisorptions of PI onto the Fe₃O₄ surfaces and polymerization reactions between the amine groups and anhydride groups could significantly affect the magnetic properties of nanocomposite materials. The observed enhanced thermal stabilities, dramatic increased storage modulus and increased glass transfer temperatures (Tgs) of the magnetic films with increasing the particle loadings indicate that the composites could be a candidate to be used as high-performance absorbing materials.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. 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

Guthrie, J. Peter;Guo, Junan published 《Acetal formation from methyl formate, pinacolone, and benzophenone: equilibrium constants in methanol and water determined by a chain of transacetalization equilibria》 in 1994. The article was appeared in 《Canadian Journal of Chemistry》. They have made some progress in their research.Application In Synthesis of Dimethoxydiphenylmethane The article mentions the following:

Transacetalization equilibrium constants can be measured in methanol solution This allows a ladder of equilibrium constants to be constructed from acetophenone, for which the equilibrium constant for acetal formation has been measured in methanol, to Me formate, for which it has not. This is the first direct measurement of an equilibrium constant for formation of an acetal of an acyclic ester. We have also determined equilibrium constants for acetal formation from benzophenone and pinacolone. The value for benzophenone is inconsistent with the value reported for the di-Et acetal by Pfeiffer and Adkins (G.J. Pfeiffer and H. Adkins. J. Am. Chem. Soc. 53, 1043 (1931)). We must conclude that their anal. method was subject to systematic errors.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 In Synthesis 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

Duan, Chunjian;Yuan, Dongming;Yang, Zenghui;Li, Song;Tao, Liming;Wang, Qihua;Wang, Tingmei published 《High wear-resistant performance of thermosetting polyimide reinforced by graphitic carbon nitride (g-C₃N₄) under high temperature》 in 2018. The article was appeared in 《Composites, Part A: Applied Science and Manufacturing》. They have made some progress in their research.Reference of 3-(4-Aminophenoxy)aniline The article mentions the following:

The two-dimensional (2D) material of graphitic carbon nitride (g-C₃N₄) has shown great promise for tribo-materials due to special mol. structure. In this work, we report an effective approach to enhance anti-wear of thermosetting polyimide (TPI) by filling with g-C₃N₄ under high temperature TPI composite (TPT-1) and g-C₃N₄ were firstly prepared Then, friction and wear behavior of TPT-1 was studied and comparatively evaluated with neat resin from room temperature to 350 °C. As a result, the wear resistance of TPI was able to significantly improve and a much lower wear rate (7.29 × 10^-7 mm³/N m) was achieved at 350 °C. Moreover, the mechanism of friction and wear demonstrated that a transfer film formed by introducing g-C₃N₄ with high E-modulus and hardness could effectively share the load with TPI and prevent further abrasion of resin in contact surfaces. This work could help researchers to design a new TPI tribo-material used at high temperature3-(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. Reference 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

Synthetic Route of C15H16O2In 2002, Ohmori, Ken;Hachisu, Yoshifumi;Suzuki, Takao;Suzuki, Keisuke published 《Stereogenic tert-alcohols via group-selective hydroalumination: further scope》. 《Tetrahedron Letters》published the findings. The article contains the following contents:

Two classes of bis-alkynyl alcs. were subjected to hydroalumination reaction, which, under suitable conditions, proceeded in a highly group-selective manner. The first set of reactants comprised (4R,5S)-5-[[[(1,1-dimethylethyl)diphenylsilyl]oxy]methyl]-α,α-di-1-hexynyl-2,2-dimethyl-1,3-dioxolane-4-methanol (I) and (4R,5S)-α,α-di-1-hexynyl-5-[(methoxyethoxy)methyl]-2,2-dimethyl-1,3-dioxolane-4-methanol. The second set of reactants comprised (4S)-α,α-di-1-hexynyl-2,2-dimethyl-1,3-dioxane-4-methanol (II) and (4S)-α,α-di-1-hexynyl-2,2-diphenyl-1,3-dioxane-4-methanol. The reaction of I with butyllithium/DIBAL gave (-)-5-[[[(1,1-dimethylethyl)diphenylsilyl]oxy]methyl]-α-1-hexenyl-α-1-hexynyl-2,2-dimethyl-1,3-dioxolane-4-methanol as the major product stereoselectively. Hydroalumination of II gave a 73/27 mixture of (4S)-α-1-hexenyl-α-1-hexynyl-2,2-dimethyl-1,3-dioxane-4-methanol (III) and its epimer. Group selectivity was changed using ethylmagnesium bromide as the reagent, thus yielding the epimer of III as the major product. 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.Synthetic Route of C15H16O2

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