Tag: M.W=100-200

Application of 1836-62-0, Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. 1836-62-0, Name is 2-(2-Methoxyphenoxy)ethylamine, SMILES is COC1=CC=CC=C1OCCN, belongs to ethers-buliding-blocks compound. In a article, author is Oprych, Dennis, introduce new discover of the category.

Mediated Generation of Conjugate Acid by UV and Blue Sensitizers with Upconversion Nanoparticles at 980 nm

NIR and UV exposure of systems comprising upconversion nanoparticles (UCNP) based on NaYF4:Tm/Yb@NaYF4, a sensitizer absorbing either in the blue or UV region, and an onium salt with weak coordinating anion resulted in formation of conjugate acid (con-H+). That was namely Ivocerin (di(4-methoxybenzoyl)diethylgermane), ITX (2-iso-propyl thioxanthone), anthracene, pyrene, rubrene, camphore quinone, and a strong fluorescent coumarin (1,1,6,6,8-pentamethyl-2,3,5,6-tetrahyhdro-1H,4H-11-oxa-3a-aza-benzo[de]anthracene-10-one). Quantification occurred by treatment with Rhodamine B lactone whose color switched to intensive red after photolytic formation of con-H+. Exposure with a NIR laser at 980 nm resulted in less con-H+ compared to 395 nm where all sensitizers absorb radiation. UCNP did not mainly interfered formation of con-H+. The different rates obtained in both experiments responsibly explain the failure and success to initiate polymerization of epoxides applying ether 980 nm or 395 nm excitation, respectively.

Application of 1836-62-0, Enzymes are biological catalysts that produce large increases in reaction rates and tend to be specific for certain reactants and products. I hope my blog about 1836-62-0 is helpful to your research.

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 150-78-7, Name is 1,4-Dimethoxybenzene, SMILES is COC1=CC=C(OC)C=C1, in an article , author is Wu, Jie, once mentioned of 150-78-7, Application In Synthesis of 1,4-Dimethoxybenzene.

Polyurethane coatings cured via azide-alkyne cycloaddition using reduced-viscosity poly(alkynyl carbamate) prepolymers

Alternative crosslinking polyurethanes (ACPUs) were created by reacting a commercial allophanate-modified polyisocyanate with propargyl alcohol to yield a poly(alkynyl carbamate); a polyazide co-reactant was created from an acrylic polyol. Conversion of the polyisocyanate into the corresponding poly(propargyl carbamate) resulted in a dramatic viscosity increase. Poly(alkynyl carbamate) prepolymers with lower viscosities were designed by replacing various fractions of the propargyl alcohol with commercial glycol ether plasticizers, ethylene glycol monoethyl ether (EGMEE), diethylene glycol monomethyl ether (DEGMEE), and diethyleneglycol monobutyl ether (DEGBE). Triethylene glycol monopropargyl ether was also studied to provide plasticization with no sacrifice of alkyne functionality. For each commercial glycol ether plasticizer, viscosity was unaffected or increased at a loading level of 10 mol%. At 25 mol%, average viscosity reduction was 36 %, with DEGBE yielding the greatest reduction at 55 %. At 33 mol%, no further decreases were observed. Triethylene glycol monopropargyl ether yielded a 76 % reduction in viscosity at 33 mol%; 100 mol% substitution yielded no further reduction. Coatings produced from the modified poly(alkynyl carbamate)s were softer and displayed lower glass transition temperatures compared to a polyisocyanate/polyol control and a 100 % propargylated poly(alkynyl carbamate)/polyazide control. Solvent resistance of the modified coatings was the same as the controls except for those created from DEGBE and from DEGMEE at 33 mol%.

Interested yet? Read on for other articles about 150-78-7, you can contact me at any time and look forward to more communication. Application In Synthesis of 1,4-Dimethoxybenzene.

The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature. 2398-37-0, Name is 1-Bromo-3-methoxybenzene, SMILES is COC1=CC(Br)=CC=C1, in an article , author is Patra, Abhay Shankar, once mentioned of 2398-37-0, HPLC of Formula: C7H7BrO.

Synergistic Effect of Polar Group Containing Collectors and Synthesized Frother on Flotation Performance of Oxidized Coal

High-rank coals are generally more floatable than low rank or oxidized coals due to their higher hydrophobicity. Surface oxidation of coals due to the exposure to atmospheric oxygen renders the surface some hydrophilic character. As a result, the low rank or oxidized coals do not effectively attach to air bubbles and result in lower flotation yields. Nonpolar collectors like diesel and other commercial collectors when used in a flotation process do not effectively attach to the hydrophilic sites of the oxidized coal surface leading to lower yields. Researchers have generally tried pre-treatment with reagents to improve the floatability of these types of coals. In the present work, we have synthesized two collectors, tetrahydrofurfuryl oleate based (C1) and tetrahydrofurfuryl ether based (C2), which contain both hydrophilic and hydrophobic components in some rationale so that they can attach to hydrophobic as well as hydrophilic sites of the oxidized coal. The attachment of synthesized collectors to the oxidized coal can provide better particle-bubble attachment which was evident from the improvement in contact angle from 73.4 degrees to a maximum of 88.54 degrees. Flotation results showed that the yield increased from 8% in absence of any collectors to 40% in presence of collector 1. The flotation performance was further enhanced by the synthesis of a novel frother and the synergistic effect of developed collectors and frothers produced higher yield (53%) and lower ash (10%) clean coal fines compared to some of the well-known collectors like diesel, polyethylene glycol and frothers like Methyl Isobutyl Carbinol (MIBC) used in the study.

Interested yet? Read on for other articles about 2398-37-0, you can contact me at any time and look forward to more communication. HPLC of Formula: C7H7BrO.

645-36-3, Name is 2,2-Diethoxyethanamine, molecular formula is C6H15NO2, HPLC of Formula: C6H15NO2, belongs to ethers-buliding-blocks compound, is a common compound. In a patnet, author is Xiong, Siyuan, once mentioned the new application about 645-36-3.

Accumulation and influencing factors of novel brominated flame retardants in soil and vegetation from Fildes Peninsula, Antarctica

The concentrations and distributions of nine novel brominated flame retardants (NBFRs) were analyzed in soil, lichen (Usnea aurantiaco-atra), and moss (Sanionia uncinata) samples collected from the Chinese Antarctic Great Wall Station and surrounding Fildes Peninsula area in west Antarctica. Total NBFR concentrations ranged from 61.2-225 pg/g dry weight (dw) in soil, 283-1065 pg/gdw in moss, and 135-401 pg/g dw in lichen, respectively. Decabromodiphenyl ethane (DBDPE) was the dominant NBFR in all samples, accounting for 652%, 50.1%, and 72.4% of cumulative NBFR concentration in soil, moss, and lichen, respectively. The concentrations of NBFRs in plant samples were higher than those in soil, which may be related to plant bioaccumulation. Significant log/log-linear correlations (p < 0.05) were found between the concentrations of BEHTEBP and total organic carbon (TOC) in soil, and between DBDPE and lipid content in mosses, indicating that TOC and lipid content potentially affect certain NBFRs in Antarctic soil and moss. This study presents the first report on NBFR contamination in soil and various vegetation in Antarctica. (C) 2020 Elsevier B.V. All rights reserved. I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 645-36-3 help many people in the next few years. HPLC of Formula: C6H15NO2.

Chemistry, like all the natural sciences, Application In Synthesis of 2,2-Diethoxyethanamine, begins with the direct observation of nature¡ª in this case, of matter.645-36-3, Name is 2,2-Diethoxyethanamine, SMILES is CCOC(OCC)CN, belongs to ethers-buliding-blocks compound. In a document, author is Zhang, Jie, introduce the new discover.

Atomistic insights into friction and wear mechanisms of graphene oxide

Graphene oxide (GO) is a promising solid lubricant used as a protective coating to reduce friction, while a detailed atomic scale understanding about its tribological behavior is required. In this study, ReaxFF reactive molecular dynamics simulations are used to explore the friction and wear mechanisms of GO. At low load, the structure of GO can be tailored via the tribochemical induced conversion from graphene oxide to graphene (GO-to-Gr), achieving low friction during the sliding process. The effects of multiple sliding and system temperature on the GO-to-Gr conversion are considered. At high load, wear of GO at the nanoscale is characterized by the emergence of the C-C bond and C-O bond breaking, both of which are related to the transformation from the epoxide groups to the ether groups. Furthermore, we show that decreasing the concentration of epoxide groups is a feasible method to enhance wear resistance of GO.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions. you can also check out more blogs about 645-36-3. Application In Synthesis of 2,2-Diethoxyethanamine.

Synthetic Route of 82830-49-7, A common heterocyclic compound, 82830-49-7, name is 2-Fluoro-1,4-dimethoxybenzene, molecular formula is C8H9FO2, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

General procedure: To an oven-dried round-bottom flask with a stir bar were charged with a solution of secondary amines 2 (1.5 mmol) in 1 mLdry THF at room temperature under an argon atmosphere. To thissolution was slowly added 1.2 mL nBuLi (2.5 mol/L in n-hexane,3.0 mmol) via syringe. After stirring at 25 C for 10 min, a solution of fluoroarene 1 (1.0 mmol) in 1mL dry THF was added to the reaction flask. The reaction mixture was stirred for 0.5 h at 25 C, and then quenched with 2 mL saturated aqueous solution of NaCl and extracted with H2O (20 mL) and ethyl acetate (3 20 mL). The organic layer was separated and dried with anhydrous Na2SO4, filtered, and evaporated under vacuum. The crude product was purified by column chromatography on silica gel using a petroleum ether/ethyl acetate mixture as eluent to afford the pure target compounds.

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Article; Lin, Yingyin; Li, Meng; Ji, Xinfei; Wu, Jingjing; Cao, Song; Tetrahedron; vol. 73; 11; (2017); p. 1466 – 1472;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Reference of 22483-09-6,Some common heterocyclic compound, 22483-09-6, name is 2,2-Dimethoxyethanamine, molecular formula is C4H11NO2, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.

General procedure: Benzaldehyde derivatives (1500 mg, 13.13 mmol) and Aminoacetaldehyde dimethyl acetal (19.70 mmol) were dissolved in 15 mL of methanol, NaBH(OAc)3 (19.70 mmol) was added at 0 C slowly in 3h. The reaction mixture was stirred at room temperature overnight and concentrated under reduced pressure. The residue was extracted with dicloromethane (DCM, 15 mL) three times, and the combined extracts were washed with 2N KOH, brine and dried over Na2SO4. The solution was filtered and added TEA (39.40 mmol) and TsCl (21.00 mmol) at 0C and stirred at room temperature for 5h. The resulting mixture was extracted with DCM (15 mL) three times. The combined organic layers were washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The resulting residue was purified by silica gel flash column chromatography (PE : EA = 5:1) to give the desired product.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2,2-Dimethoxyethanamine, its application will become more common.

Reference:
Article; Shi, Zeyu; Xiao, Qiong; Yin, Dali; Chinese Chemical Letters; (2019);,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 10103-06-7, name is 2,3-Dimethoxynaphthalene belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below. Product Details of 10103-06-7

EXAMPLE 1; 2-(l-(6,7-bis(difluoro methoxy)naphthalen-2-yl)-2-methylpropyl)-2H-tetrazole (1)To a stirred solution of A (40 g, 0.21 mol) in CH2CI2 (600 mL) was added isobutyryl chloride (34 mL, 0.31 mol) at -5 C, followed by portion- wise addition of AICI3 (56.8 g, 0.42 mol) over a period of 20 min under N2 atmosphere. The reaction was allowed to slowly warm to RT and stirred for 3h; the reaction mixture was poured into ice-cold water (200 mL) and the organic layer was separated. The aqueous layer was then extracted with CH2CI2 (2 x 100 mL); combined organic extracts were washed with 5% NaHC03 solution (100 mL), water (100 mL), brine (100 mL) and dried over anhydrous Na2S04. After filtration and evaporation under reduced pressure, the crude material was washed with w-hexane to afford B (35 g, 0.13 mol, 63%) as off-white solid. 1H NMR (200 MHz, CDC13): delta 8.34 (s, 1 H), 7.90 (dd, / = 8.6,1.8 Hz, 1 H), 7.73 (d, / = 8.6 Hz, 1 H), 7.26 (s, 1 H), 7.14 (s, 1 H), 4.03 (s, 6 H), 3.79-3.63 (m, 1 H), 1.27 (d, / = 7.0 Hz, 6H). MS (ESI): mlz 259 [M+H]+.To a stirred solution of B (18 g, 69 mmol) in CH2C12 (180 mL) was added BBr3 (87.2 g, 348 mmol) drop wise at -40 C. After completion of addition, stirring was continued for addition 1 h at -40 C and 1 h at RT. The reaction mixture was poured into cold water and aqueous layer was then extracted with CH2CI2 (2 x 200 mL). Combined organic extracts were washed with water (100 mL), brine (100 mL) and dried over anhydrous Na2S04. After filtration and evaporation of solvent under reduced pressure, the crude material was purified by column chromatography (Si02, 100-200 mesh) to afford C (9.0 g, 39 mmol, 56%) as brown color solid. 1H NMR (200 MHz, CDC13): delta 8.29 (s, 1 H), 7.88 (dd, / = 8.8, 1.6 Hz, 1 H), 7.68 (d, / = 8.6 Hz, 1 H), 7.36 (s, 1 H), 7.26 (s, 1 H), 5.88 (br s, 2 H), 3.79-3.63 (m, 1 H), 1.27 (d, / = 6.8 Hz, 6 H).To a stirred solution of C (10.0 g, 0.043 mol) in DMF (100 mL) were added sodium 2-bromo-2,2- difluoroacetate (42.6 g, 0.21 mol) (the Na salt was prepared by treating ester with 1.0 eq of NaOH in EtOH: H20 (2:1) at RT for 16. Then solvent was evaporated and residue was co-distilled with toluene (3 times) to obtain the salt.) and K2C03 (36 g, 0.26 mol) and the mixture was stirred at 80- 90 C for 48 h. The reaction mixture was poured into cold water and aqueous layer was then extracted with CH2C12 (3 x 100 mL). Combined organic extracts were washed with water (50 mL), brine (50 mL) and dried over anhydrous Na2S04. After filtration and evaporation of solvent under reduced pressure, the crude material was purified by column chromatography (Si02, 100- 200 mesh) to afford D (3.0 g, 0.009 mol, 21%) as a solid. 1H NMR (500 MHz, CDC13): delta 8.40 (s, 1 H), 8.05 (dd, / = 8.5, 1.5 Hz, 1 H), 7.86 (d, / = 9.0 Hz, 1 H), 7.79 (s, 1 H), 7.68 (s, 1 H), 6.67 (t, JF.H = 73 Hz, 1 H), 6.65 (t, JF>H = 73 Hz, 1 H), 3.72-3.65 (m, 1 H), 1.27 (d, / = 7.0 Hz, 6 H). To a stirred solution of D (0.65 g, 1.96 mmol) in MeOH (10 mL) was added NaBH4 (0.15 g, 3.9 mmol) at 0 C and the resulting mixture was stirred for additional 30 min at 0 C. The reaction mixture was quenched with ice-cold water and the aqueous layer was then extracted with EtOAc (2 x 50 mL). Combined organic extracts were washed with brine, dried over anhydrous Na2S04 and concentrated under reduced pressure. The crude material was purified by column chromatography (Si02, 100-200 mesh) using gradients of EtOAc/hexane to afford E (0.58 g, 1.74 mmol, 89%) as a semi solid. 1H NMR (200 MHz, CDC13): delta 7.80-7.72 (m, 2 H), 7.64 (s, 2 H), 7.50 (dd, / = 8.4, 1.8 Hz, 1 H), 6.63 (t, JF>H = 72 Hz, 2 H), 4.58-4.53 (m, 1 H), 2.10-2.00 (m, 1 H), 1.95 (d, / = 3.0 Hz, 1 H), 1.00 (d, / = 6.8 Hz, 3 H), 0.84 (d, / = 6.8 Hz, 3 H).To a stirred solution of E (0.8 g, 2.4 mmol) in acetonitrile (15 mL) was added thionyl chloride (0.27 mL, 3.61 mmol) at 0 C and the resulting reaction mixture was stirred for additional 30 min at 0 C. The reaction mixture was quenched with water (20 mL) and the aqueous layer was then extracted with EtOAc (3 x 50 mL). The combined organic extracts were washed with 5% NaHC03 solution (50 mL), water (50 mL), brine (50 mL), dried over anhydrous Na2S04 and concentrated under reduced pressure to afford F (0.8 g, 2.28 mol, 95%) as solid. 1H NMR (200 MHz, CDCI3): delta 7.81-7.72 (m, 2 H), 7.65 (s, 2 H), 7.53 (dd, / = 8.6,1.8 Hz, 1 H), 6.62 (t, JF>H = 74 Hz, 2 H), 4.75 (d, / = 8.0 Hz, 1 H), 2.38-2.28 (m, 1 H), 1.14 (d, / = 6.4 Hz, 3 H), 0.87 (d, / = 6.8 Hz, 3 H).To a stirred solution of F (0.3 g, 0.85 mmol) in DMF (5 mL) were added K2C03 (0.47 g, 3.41 mmol) and IH-tetrazole (0.18 g, 2.56 mmol) at RT. The reaction mixture was heated at 90 C for 36 h. The reaction mixture was diluted with water (50 mL) and extracted with EtOAc (2 x 50 mL); combined organic extracts were washed with water (50 mL), brine (50 mL) and dried over anhydrous Na2S04. After filtration and evaporation of solvent under reduced pressure, the crude mater…

The synthetic route of 10103-06-7 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; VIAMET PHARMACEUTICALS, INC.; HOEKSTRA, William, J.; SCHOTZINGER, Robert, J.; RAFFERTY, Stephen, William; WO2011/82245; (2011); A2;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Adding a certain compound to certain chemical reactions, such as: 701-56-4, name is 4-Methoxy-N,N-dimethylaniline, belongs to ethers-buliding-blocks compound, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 701-56-4, name: 4-Methoxy-N,N-dimethylaniline

General procedure: Under an atmosphere of N2, KOt-Bu (2.2 mmol), dioxane (0.9 mL), DMSO (1.65 mmol), tertiary amine 1 (0.55 mmol), and aryl halide 2(1.65 mmol) were successively added to a Schlenk reaction tube. The mixture was stirred vigorously at 80-120 C for 12 h. Then the mixture was diluted with EtOAc, washed with sat. brine, and dried (anhyd Na2SO4). Then the solvent was removed under reduced pressure and the residue was purified by flash column chromatography (petroleum ether and petroleum ether-EtOAc, 100:1 for the methoxy group derived products) to give pure products 3.

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, 4-Methoxy-N,N-dimethylaniline, other downstream synthetic routes, hurry up and to see.

Reference:
Article; Huang, Pei; He, Bang-Yue; Wang, Hui-Min; Lu, Jian-Mei; Synthesis; vol. 47; 2; (2015); p. 221 – 227;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. 651734-54-2, name is 2,6-Difluoro-3,5-dimethoxyaniline, This compound has unique chemical properties. The synthetic route is as follows., Computed Properties of C8H9F2NO2

TEA (0.15mL) was added to a solution of 6-chloro nicotinic acid (0.12g, 0.79 mmol) in DMF (2mL) followed by the addition of T3P (0.67mg, 1.0 mmol). Stirred the reaction mass for 10 min. and added 2,6-difluoro-3,5-dimethoxyaniline (O. lg, 0.52mmol). Continued the stirring with heating at 100 C for 24h. Quenched the reaction mass with ice cold water and the solid separated is filtered, dried under vacuum to afford desired title compound (0.14g, 80%). LCMS: m/z = 329.0 (M+H)+.

According to the analysis of related databases, 651734-54-2, the application of this compound in the production field has become more and more popular.

Reference:
Patent; EISAI R & D MANAGEMENT CO., LTD.; REYNOLDS, Dominic; HAO, Ming-Hong; WANG, John; PRAJAPATI, Sundeep; SATOH, Takashi; SELVARAJ, Anand; (128 pag.)WO2016/164703; (2016); A1;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem