Category: ethers-buliding-blocks

Hiba, K.; Sreekumar, K. published their research in Reactive & Functional Polymers in 2021. The article was titled 《Multi- arm dendronized polymer as a unimolecular micelle: Synthesis, characterization and application as organocatalyst in the synthesis of N-unsubstituted 1,2,3-triazoles》.Electric Literature of C8H8O2 The article contains the following contents:

The present work reports dendronized polymer based catalysis in which the dendritic cavity and surface functional groups are the reactive centers due to the formation of dendritic unimol. micelle in aqueous medium. First generation amine functionalized tris(hydroxymethyl)propane initiated polyepichlorohydrin cored dendronized polymer TMP-PECH-Amine-G1 was synthesized and properly characterized with different anal. techniques. High functional group capacity, thermal stability and good water solubility are the eye-catching features of the TMP-PECH-Amine-G1 catalyst. The catalytic activity of TMP-PECH-Amine-G1 was studied by synthesizing 4-aryl-1H-1,2,3-triazoles I (R = H, 3-Cl, 4-N(CH3)2, 3,4-(OMe)2, etc.) by one pot condensation reaction of aromatic aldehydes RCHO, nitromethane and sodium azide. The synthesized catalyst offered high yield of products with low catalyst loading in green reaction media without the presence of any external additives. The catalyst was regenerated for six cycles of reaction without substantial loss in activity. This is the first reported method where homogeneous amine functionalized dendronized polymer was used as an organo catalyst for the synthesis of 4-substituted triazoles I. In the part of experimental materials, we found many familiar compounds, such as 2-Methoxybenzaldehyde(cas: 135-02-4Electric Literature of C8H8O2)

2-Methoxybenzaldehyde(cas: 135-02-4) is used as a flavor agent in foods including nonalcoholic/alcoholic beverages, baked goods, chewing gum, confections, frozen dairy, fruit ices, hard/soft candy, instant coffee, tea, Jams, jellies, and milk products. It also has been used to obtain good enantioselectivities using Cu(OAc)(2)-bis(oxazolines) via hydrogen bonding in asymmetric Henry reaction.Electric Literature of C8H8O2

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

Hirata, Shuichi; Osako, Takao; Uozumi, Yasuhiro published their research in Helvetica Chimica Acta in 2021. The article was titled 《Palladium-Catalyzed Aminocarbonylation of Aryl Halides with N,N-Dialkylformamide Acetals》.Recommanded Product: N,N-Dimethylformamide Dimethyl Acetal The article contains the following contents:

Herein, a protocol for the palladium-catalyzed aminocarbonylation of aryl halides using less-toxic formamide acetals as bench-stable aminocarbonyl sources under neutral conditions has been developed. Various aryl (including heteroaryl) halides reacted with N,N-dialkylformamide acetals in the presence of a catalytic amount of tris(dibenzylideneacetone)dipalladium(0)-chloroform adduct and xantphos to give the corresponding aromatic carboxamides at 90-140°C without any activating agents or bases in up to quant. chem. yield. This protocol was applied to aryl bromides, aryl iodides and a triflate, as well as to relatively less-reactive aryl chlorides. A wide range of functionalities on the aromatic ring of the substrates was tolerated under the aminocarbonylation conditions. The catalytic aminocarbonylation was used to prepare the insect repellent N,N-diethyl-3-methylbenzamide as well as a synthetic intermediate of the dihydrofolate reductase inhibitor triazinate. The experimental process involved the reaction of N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5Recommanded Product: N,N-Dimethylformamide Dimethyl Acetal)

N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5) belongs to anime. Large quantities of aliphatic amines are made synthetically. The most widely used industrial method is the reaction of alcohols with ammonia at a high temperature, catalyzed by metals or metal oxide catalysts (e.g., nickel or copper). Mixtures of primary, secondary, and tertiary amines are thereby produced.Recommanded Product: N,N-Dimethylformamide Dimethyl Acetal

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

《Synthesis and biological evaluation of berberine derivatives as a new class of broad-spectrum antiviral agents against Coxsackievirus B》 was published in Bioorganic Chemistry in 2020. These research results belong to Zeng, Qing-Xuan; Wang, Hui-Qiang; Wei, Wei; Guo, Ting-Ting; Yu, Lian; Wang, Yan-Xiang; Li, Yu-Huan; Song, Dan-Qing. Quality Control of tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate The article mentions the following:

A series of novel berberine (BBR) analogs were prepared and tested for their antiviral potencies against six different genotype Coxsackievirus B (CVB1-6) strains, taking BBR core for structural modification. Structure-activity relationship (SAR) research revealed that introduction of a primary amine through a linker at position 3 might be beneficial for both antiviral activity and safety. Compound 14c displayed most promising inhibitory potency with IC50 values of 3.08-9.94μM against tested CVBs 2-6 strains and satisfactory SI value of 34.3 on CVB3, better than that of BBR. Also, 14c could inhibit CVB3 replication through down-regulating the expression of VP1 protein and VP1 RNA. The mechanism revealed that 14c could suppress host components JNK-MAPK, ERK-MAPK and p38-MAPK activation. Therefore, BBR derivatives were considered to be a new class of anti-CVB agents with an advantage of broad-spectrum anti-CVB potency. In the experimental materials used by the author, we found tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6Quality Control of tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate)

tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6) belongs to ethers.The C-O bonds that comprise simple ethers are strong. They are unreactive toward all but the strongest bases. Although generally of low chemical reactivity, they are more reactive than alkanes. Quality Control of tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate

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

The author of 《Phenyl Disulfide Additive for Solution-Mediated Carbon Dioxide Utilization in Li-CO2 Batteries》 were Pipes, Robert; Bhargav, Amruth; Manthiram, Arumugam. And the article was published in Advanced Energy Materials in 2019. Reference of 1,2-Diphenyldisulfane The author mentioned the following in the article:

Ph disulfide (PDS) is employed as an electrolyte additive in lithium-carbon dioxide (Li-CO2) batteries to allow for a solution-mediated carbon dioxide reduction pathway. Thiophenolate anions, generated via electrochem. reduction of PDS, act as CO2 capture agents by forming the adduct S-Ph carbonothioate (SPC-) in solution A mechanism of SPC–mediated CO2 capture and utilization is proposed and supported via carbon-13 NMR spectroscopy and Fourier-transform IR spectroscopy. Reversible formation and decomposition of lithium carbonate and amorphous carbon during cycling, facilitated by the solution-mediated pathway, are demonstrated with an array of characterization techniques. Li-CO2 batteries employing the PDS additive show vastly improved capacity, energy efficiency, and cycle life. The enhanced Li-CO2 battery performance offered by the proposed solution-mediated reaction pathway offers a compelling step forward in the pursuit of reversible CO2 utilization.1,2-Diphenyldisulfane(cas: 882-33-7Reference of 1,2-Diphenyldisulfane) was used in this study.

1,2-Diphenyldisulfane(cas: 882-33-7) belongs to ethers.Ethers do have nonbonding electron pairs on their oxygen atoms, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds. The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.Reference of 1,2-Diphenyldisulfane

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

The author of 《Jet-cooled rovibrational spectroscopy of methoxyphenols using two complementary FTIR and QCL based spectrometers》 were Asselin, P.; Bruckhuisen, J.; Roucou, A.; Goubet, M.; Martin-Drumel, M.-A.; Jabri, A.; Belkhodja, Y.; Soulard, P.; Georges, R.; Cuisset, A.. And the article was published in Journal of Chemical Physics in 2019. Safety of m-Methoxyphenol The author mentioned the following in the article:

Methoxyphenols (MPs) are a significant component of biomass burning emissions which mainly exists in our atm. in the gas phase where they contribute to the formation of secondary organic aerosols (SOAs). Rovibrational spectroscopy is a promising tool to monitor atm. MPs and infer their role in SOA formation. In this study, we bring a new perspective on the rovibrational anal. of MP isomers by taking advantage of two complementary devices combining jet-cooled environments and absorption spectroscopy: the Jet-AILES and the SPIRALES setups. Based on Q-branch frequency positions measured in the Jet-AILES Fourier-transform IR (FTIR) spectra and guided by quantum chem. calculations, we propose an extended vibrational and conformational anal. of the different MP isomers in their fingerprint region. Some modes such as far-IR out-of-plane -OH bending or mid-IR in-plane -CH bending allow us to assign individually all the stable conformers. Finally, using the SPIRALES setup with three different external cavity quantum cascade laser sources centered on the 930-990 cm-1 and the 1580-1690 cm-1 ranges, it was possible to proceed to the rovibrational anal. of the ν18 ring in-plane bending mode of the MP meta isomer providing a set of reliable excited state parameters, which confirms the correct assignment of two conformers. Interestingly, the observation of broad Q-branches without visible P- and R-branches in the region of the C-C ring stretching bands was interpreted as being probably due to a vibrational perturbation. These results highlight the complementarity of broadband FTIR and narrowband laser spectroscopic techniques to reveal the vibrational conformational signatures of atm. compounds over a large IR spectral range. (c) 2019 American Institute of Physics. The experimental process involved the reaction of m-Methoxyphenol(cas: 150-19-6Safety of m-Methoxyphenol)

m-Methoxyphenol(cas: 150-19-6) may be used in synthesis of:C(4) symmetric calix[4]resorcinarene, 2-nitroso-5-methoxyphenol, 6-methoxy-2(3H)-benzoxazoloneSafety of m-Methoxyphenol

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

The author of 《Kinetic and Theoretical Study of the Atmospheric Aqueous-Phase Reactions of OH Radicals with Methoxyphenolic Compounds》 were He, Lin; Schaefer, Thomas; Otto, Tobias; Kroflic, Ana; Herrmann, Hartmut. And the article was published in Journal of Physical Chemistry A in 2019. Name: m-Methoxyphenol The author mentioned the following in the article:

Methoxyphenols, which are emitted through biomass burning, are an important species in atm. chem. In the present study, temperature-dependent aqueous-phase OH radical reactions of six methoxyphenols and two related phenols have been investigated through laser flash photolysis and the d. functional theory. The rate constants obtained were in a range of (1.1-1.9) × 1010 L mol-1 s-1 with k(3-MC) > k(Cre) ≈ k(Syr) ≈ k(MEP) > k(Res) > k(3-MP) > k(2-EP) ≈ k(2-MP). We derived the parameters of these reactions from the obtained T-dependent rate constants and found a mean Arrhenius activation energy of 16.9 kJ mol-1. The diffusion rate constants were calculated for each case and compared to the measured ones. Generally, the rate constants are found to be close to fully diffusion-controlled (kdiff = (1.4-1.5) × 1010 L mol-1 s-1 for all reactions). A structure-function relationship was established through the measurement result, which could be used for predicting unknown rate constants of other phenolic compounds All of these findings are expected to enhance the predictive capabilities of models, such as the chem. aqueous-phase radical mechanism. In the part of experimental materials, we found many familiar compounds, such as m-Methoxyphenol(cas: 150-19-6Name: m-Methoxyphenol)

m-Methoxyphenol(cas: 150-19-6) may be used in synthesis of:C(4) symmetric calix[4]resorcinarene, 2-nitroso-5-methoxyphenol, 6-methoxy-2(3H)-benzoxazoloneName: m-Methoxyphenol

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

《Coordination Polymers as a Functional Material for the Selective Molecular Recognition of Nitroaromatics and ipso-Hydroxylation of Arylboronic Acids》 was written by Rani, Pooja; Husain, Ahmad; Bhasin, K. K.; Kumar, Girijesh. Safety of m-MethoxyphenolThis research focused onzinc cadmium pyridinylnaphthalenecarboxamide polymer preparation hydroxylation catalyst; fluorescent sensor zinc cadmium pyridinylnaphthalenecarboxamide polymer; crystal structure zinc cadmium pyridinylnaphthalenecarboxamide polymer; Coordination polymer; Fluorescence; Nitroaromatics; Quenching Efficiency; Sensing; ipso-Hydroxylation. The article conveys some information:

We report the synthesis and structural characterization of two coordination polymers (CPs), namely; [{Zn(L)(DMF)4} · 2BF4]α (1) and [{Cd(L)2(Cl)2} · 2H2O]α (2) (where L=N2,N6-di(pyridin-4-yl)naphthalene-2,6-dicarboxamide). Crystal packing of 1 reveals the existence of channels running along the b- and c-axis filled by the ligated DMF and lattice anions, resp. Whereas, crystal packing of 2 reveals that the metallacycles of each 1D chain are intercalating into the groove of adjacent metallacycles resulting in the stacking of 1D loop-chains to form a sheet-like architecture. In addition, both 1 and 2 were exploited as multifunctional materials for the detection of nitroarom. compounds (NACs) as well as a catalyst in the ipso-hydroxylation of aryl/heteroarylboronic acids. Remarkably, 1 and 2 showed high fluorescence stability in an aqueous medium and displayed a maximum 88% and 97% quenching efficiency for 4-NPH, resp. among all the investigated NACs. The mechanistic investigation of NACs recognition suggested that the fluorescence quenching occurred via electron as well as energy transfer process. Furthermore, the ipso-hydroxylation of aryl/heteroarylboronic acids in presence of 1 and 2 gave up to 99% desired product yield within 15 min in our established protocol. In both cases, 1 and 2 are recyclable upto five cycles without any significant loss in their efficiency.m-Methoxyphenol(cas: 150-19-6Safety of m-Methoxyphenol) was used in this study.

m-Methoxyphenol(cas: 150-19-6) may be used as an analytical standard for the determination of the analyte in wine, coffee beans, wood samples, and mainstream smoke by gas chromatography (GC) based techniques.Safety of m-Methoxyphenol

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

Name: N,N-Dimethylformamide Dimethyl AcetalIn 2020 ,《Novel bis(pyrazole-benzofuran) hybrids possessing piperazine linker: Synthesis of potent bacterial biofilm and MurB inhibitors》 appeared in Bioorganic Chemistry. The author of the article were Mekky, Ahmed E. M.; Sanad, Sherif M. H.. The article conveys some information:

Novel 1,4-bis[(2-(3-(dimethylamino)-1-oxoprop-2-en-1-yl)benzofuran-5-yl)methyl]piperazine I [X = Me2NCH:CHC(O)] was prepared and used as a key synthon for the this protocol. 1,3-Dipolar cycloaddition of this synthon with the appropriate hydrazonyl chlorides R1C(O)CCl:NNHR2 (R1 = Me, EtO; R2 = Ph, 4-ClC6H4, 4-MeC6H4, 4-MeOC6H4, 4-O2NC6H4) afforded a new series of bis-pyrazoles I (X = 1-R2-3-(R1CO)-pyrazol-4-ylcarbonyl). Furthermore, the latter reacted with hydrazine hydrate to afford bis(pyrazolo[3,4-d]pyridazine)s I (X = 7-methyl-2-R2-2H-pyrazolo[3,4-d]pyridazin-4-yl, 7-oxo-2-R2-6,7-dihydro-2H-pyrazolo[3,4-d]pyridazin-4-yl). Reaction of the synthon I [X = Me2NCH:CHC(O)] with hydrazine hydrate or phenylhydrazine afforded the corresponding bis(pyrazole)s I (X = 1H-pyrazol-3-yl, 1-phenyl-1H-pyrazol-5-yl), resp. The reaction of I (X = MeCO) with Ph hydrazine followed by treatment with DMF-DMA resulted in I (X = 1-phenyl-1H-pyrazol-4-yl). Various bacterial strains and cell lines were selected to study the in-vitro antibacterial and cytotoxic activities for the synthesized compounds The compound I [X = 1-(4-nitrophenyl)-3-acetyl-1H-pyrazol-4-ylcarbonyl; (II)] showed the best antibacterial efficacies with MIC/MBC values of 1.2/1.2, 1.2/2.4 and 1.2/2.4μM against each of E. coli, S. aureus and S. mutans strains, resp. In addition, the inhibitory activity of some compounds as MRSA and VRE inhibitors were studied. The compound II gave the best inhibitory activity with MIC/MBC values of 18.1/36.2, 9.0/18.1 and 18.1/18.1μM, resp., against MRSA (ATCC:33591 and ATCC:43300) and VRE (ATCC:51575) bacterial strains, resp. This compound also showed more effective biofilm inhibition activities than the reference Ciprofloxacin. The compound II showed IC50 values of 3.0 ±0.05, 3.2 ±0.08 and 3.3 ± 0.07μM against S. aureus, S. mutans and E. coli strains, resp. Furthermore, exptl. study showed excellent inhibitory activities of compounds I [X = 1-R2-3-(R1CO)-pyrazol-4-ylcarbonyl; R2 = 4-ClC6H4, 4-O2NC6H4] against MurB enzyme. The compound II gave the best MurB inhibitory activity with IC50 value of 3.1μM. The in-silico study was performed to predict the capability of compounds I [X = 1-R2-3-(R1CO)-pyrazol-4-ylcarbonyl; R2 = 4-ClC6H4, 4-O2NC6H4] as potential inhibitors of MurB enzyme. In the experiment, the researchers used N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5Name: N,N-Dimethylformamide Dimethyl Acetal)

N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5) belongs to anime. The methylamines occur in small amounts in some plants. Many polyfunctional amines (i.e., those having other functional groups in the molecule) occur as alkaloids in plants—for example, mescaline, 2-(3,4,5-trimethoxyphenyl)ethylamine; the cyclic amines nicotine, atropine, morphine, and cocaine; and the quaternary salt choline, N-(2-hydroxyethyl)trimethylammonium chloride, which is present in nerve synapses and in plant and animal cells.Name: N,N-Dimethylformamide Dimethyl Acetal

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

Application of 10365-98-7In 2020 ,《Novel formyl peptide receptors (FPRs) agonists with pyridinone and pyrimidindione scaffolds that are potentially useful for the treatment of rheumatoid arthritis》 appeared in Bioorganic Chemistry. The author of the article were Crocetti, Letizia; Vergelli, Claudia; Guerrini, Gabriella; Cantini, Niccolo; Kirpotina, Liliya N.; Schepetkin, Igor A.; Quinn, Mark T.; Parisio, Carmen; Di Cesare Mannelli, Lorenzo; Ghelardini, Carla; Giovannoni, Maria Paola. The article conveys some information:

The resolution of inflammation is an active response involving the interaction of pro-resolving mediators with specific receptors, such as N-formyl peptide receptor 2 (FPR2). FPRs represent potentially important therapeutic targets for the treatment of some pathologies, including asthma and rheumatoid arthritis. Previously, we identified selective or mixed FPR agonists with a pyridazin-3(2H)-one scaffold, all containing a 4-bromophenylacetamide fragment at N-2. The most effective compounds in this series were EC3, a potent mixed FPR1/FPR2/FPR3 agonist, and EC10, which had a preference for FPR1. We report here a new series of pyridinone and pyrimidindione derivatives containing the 4-(bromophenyl)acetamide substituent that was essential for activity in the pyridazinone series. All new compounds were evaluated for FPR agonist activity in HL60 cells transfected with FPR1 or FPR2 and in human neutrophils. While most of the pyridinone derivatives had reasonable FPR agonist activity in the submicromolar/micromolar range, the pyrimidindione derivatives were less active. Compound 2a (N-(4-bromophenyl)-2-[3-cyano-5-(3-methoxyphenyl)-6-methyl-2-oxopyridin-1(2H)-yl]acetamide) was the most active pyridinone derivative and had a 10-fold preference for FPR2 (EC50 = 120 nM) vs. FPR1 (EC50 = 1.6 μM). To assess their therapeutic activity, compounds 2a, EC3, and EC10 were evaluated in vivo using a rat model of rheumatoid arthritis. All three compounds increased the pain threshold and reduced pain hypersensitivity in the treated rats vs. control rats, although 2a and EC10 were much more effective than EC3. Thus, these FPR agonists represent potential leads to develop for the treatment of inflammatory diseases such as rheumatoid arthritis. In the experiment, the researchers used 3-Methoxyphenylboronic acid(cas: 10365-98-7Application of 10365-98-7)

3-Methoxyphenylboronic acid(cas: 10365-98-7) belongs to boronic acids. Boronic acids are mild Lewis acids which are generally stable and easy to handle, making them important to organic synthesis.Application of 10365-98-7

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

In 2022,Wang, Tian-Ci; Wang, Pu-Sheng; Chen, Dian-Feng; Gong, Liu-Zhu published an article in Science China: Chemistry. The title of the article was 《Access to chiral homoallylic vicinal diols from carbonyl allylation of aldehydes with allyl ethers via palladium-catalyzed allylic C-H borylation》.Synthetic Route of C9H10O2 The author mentioned the following in the article:

An asym. carbonyl allylation of aldehydes with allyl ethers proceeding via allylic C-H borylation enabled by palladium and chiral phosphoric acid sequential catalysis, providing facile access to homoallylic vicinal anti-diols such as I [R1 = n-heptyl, 4-O2NC6H4, BnOCH2, etc.; R2 = H, Me, cyclohexyl, etc.; R3 = Bn, PMB, TBSO(CH2)3, etc.] in high yields and with excellent stereoselectivity was described. This protocol enabled total synthesis of aigialomycin D to be finished within 7 steps. The results came from multiple reactions, including the reaction of 2-(Benzyloxy)acetaldehyde(cas: 60656-87-3Synthetic Route of C9H10O2)

2-(Benzyloxy)acetaldehyde(cas: 60656-87-3) is a non-natural aldehyde. It undergoes enantioselective Mukaiyama aldol reaction with silylketene acetal nucleophiles in the presence of C2-symmetric bis(oxazolinyl)pyridine Cu(II) complex (catalyst).Synthetic Route of C9H10O2

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