Tag: 100-200

The author of 《A green, catalyst-free synthesis of pyrazolopyranopyrimidines in polyethylene glycol as a biodegradable medium at ambient temperature》 were Kardooni, Rezvan; Kiasat, Ali Reza. And the article was published in Molecular Diversity in 2019. HPLC of Formula: 135-02-4 The author mentioned the following in the article:

A facile, efficient and environmentally safe strategy for the synthesis of pyrazolopyranopyrimidines via one-pot, four-component reaction of hydrazine hydrate, barbituric acid, Et acetoacetate and aromatic aldehydes in polyethylene glycol (PEG) as a safe solvent in the absence of catalyst at ambient temperature were described. The advantages of the present protocol, such as simplicity, mild conditions, high yields of products, straightforward workup procedure, a green and biodegradable reaction medium, made this process an attractive to current methodologies. The results came from multiple reactions, including the reaction of 2-Methoxybenzaldehyde(cas: 135-02-4HPLC of Formula: 135-02-4)

2-Methoxybenzaldehyde(cas: 135-02-4) is found in cassia oil, cinnamon bark, and cinnamon bark oil. It is a clear colorless liquid with a strong aroma. It has been used to examine the acaricidal activity of Periploca sepium oil and its active component against Tyrophagus putrescentiae.HPLC of Formula: 135-02-4

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

The author of 《Schiff-based Pd(II)/Fe(III) bimetallic self-assembly monolayer – Preparation, structure, catalytic dynamic and synergism》 were Huang, Pingping; Song, Erran; Sun, Yimeng; Li, Tiesheng; Wei, Donghui; Liu, Minghua; Wu, Yangjie. And the article was published in Molecular Catalysis in 2019. Recommanded Product: 1-Bromo-3-methoxybenzene The author mentioned the following in the article:

Graphene oxide-supported Pd(II)/Fe(III) bimetallic catalytic monolayer (denoted as GO@H-Pd/Fe) was prepared and characterized. Its catalytic performance was assessed for the Suzuki coupling reaction; its synergetic effect and catalytic mechanism were also systematically investigated. Results showed that orientation, composition and distribution of catalyst had an efficient effect on catalytic activity. Catalytic activity of [email protected]/Fe0.90 was 475 times more than that of GO@H-Pd due to the ordered catalytic monolayer immobilized on GO, proper ratio of Pd/Fe and the synergetic effect between Pd(II) and Fe(III), which could form an active cluster containing Pd and Fe. The deactivation mechanism was confirmed to be the aggregation of the active center during recycling. A heterogeneous catalytic mechanism was also proved by the poison test, hot filtration and ReactIR. The results of ReactIR presented different dynamic catalytic processes for [email protected] and homogeneous catalyst (Li2PdCl4/FeCl3·6H2O). The activation energies were 9.7 KJ/mol and 3.7 KJ/mol obtained for the heterogeneous and homogeneous catalysts, resp. The experimental process involved the reaction of 1-Bromo-3-methoxybenzene(cas: 2398-37-0Recommanded Product: 1-Bromo-3-methoxybenzene)

1-Bromo-3-methoxybenzene(cas: 2398-37-0) can be used in chemical reaction as intermediates to obtain target materials such as dyes, pharmaceuticals, perfumes, photoinitiators and agrochemicals.Recommanded Product: 1-Bromo-3-methoxybenzene

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

In 2012,Analytical Methods included an article by Chu, Chengchao; Wang, Xiu; Li, Shuai; Ge, Shenguang; Ge, Lei; Yu, Jinghua; Yan, Mei. Recommanded Product: 1,4-Diethynyl-2,5-dimethoxybenzene. The article was titled 《Synthesis, characterization of a novel phenyleneethynylene derivative and application in a fluorescence DNA sensor》. The information in the text is summarized as follows:

In this paper, a novel phenyleneethynylene derivative 4,4′-(2,5-dimethoxy-1,4-phenylene)bis(ethyne-2,1-diyl) dibenzoic acid (p-acid) was synthesized. IR spectroscopy (IR), NMR, photoluminescence (PL) spectroscopy and UV visible (UV-vis) spectroscopy were applied to characterize p-acid. The p-acid doped silica nanoparticle (p-acid@SiO2) was assembled in layer-by-layer (LBL) self-assembling processes using tetraethoxysilane (TEOS). Scanning electron microscope (SEM) and transmission electron microscope (TEM) were applied to characterize p-acid@SiO2. To research the practical applicability, a sample DNA sensor was constructed using p-acid@SiO2 label, in which the PL intensity response was proportion to the target-DNA (S2) concentration in the range of 0.05-1000 fM, with a detection limit of 20 pM. Furthermore, the DNA sensor showed high specificity, excellent stability, and good reproducibility. The p-acid@SiO2-based DNA sensor can also provide potential application for detection of other pathogen DNA. In the experimental materials used by the author, we found 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Recommanded Product: 1,4-Diethynyl-2,5-dimethoxybenzene)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) 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. Recommanded Product: 1,4-Diethynyl-2,5-dimethoxybenzene 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.

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

Category: ethers-buliding-blocksOn June 9, 2020, Zhu, Junli; Chu, Ming; Chen, Zuowei; Wang, Liquan; Lin, Jiaping; Du, Lei published an article in Chemistry of Materials. The article was 《Rational Design of Heat-Resistant Polymers with Low Curing Energies by a Materials Genome Approach》. The article mentions the following:

Designing high-temperature polymers with excellent processability is a long-standing challenge due to the implacable contradiction between high thermal stability and low curing energy. Traditional designs based on scientific intuition and trial-and-error experiments have not been efficient strategies for the discovery of new heat-resistant resins. In this work, we developed a materials genome approach to facilitate the design of new heat-resistant resins with the desired properties. By defining the gene and extracting the “”genetic”” features, we proposed a two-step strategy to screen candidate resins obtained from combinations of genes. A new kind of heat-resistant resin was predicted by rapid screening and was further verified by theor. simulations and exptl. studies. The basic framework developed for the present materials genome approach can be generalized for the rapid design of other high-performance materials. The experimental process involved the reaction of 1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6Category: ethers-buliding-blocks)

1,4-Diethynyl-2,5-dimethoxybenzene(cas: 74029-40-6) belongs to ethers.Category: ethers-buliding-blocksAlthough ethers resist hydrolysis, they are cleaved by hydrobromic acid and hydroiodic acid. Hydrogen chloride cleaves ethers only slowly.

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

Reference of 3-Methoxyphenylboronic acidIn 2020 ,《Tetradentate Platinum(II) Complexes for Highly Efficient Phosphorescent Emitters and Sky Blue OLEDs》 was published in Chemistry of Materials. The article was written by Li, Guijie; Zhao, Xiangdong; Fleetham, Tyler; Chen, Qidong; Zhan, Feng; Zheng, Jianbing; Yang, Yun-Fang; Lou, Weiwei; Yang, Yuning; Fang, Kun; Shao, Zongzhou; Zhang, Qisheng; She, Yuanbin. The article contains the following contents:

A series of tetradentate Pt(II) emitters containing fused 5/6/6 metallocycles have been designed and synthesized. Mol. geometries play a critical role in determining the photophys. properties. Their emission spectra are significantly affected by the geometries of the mol. core skeletons, the substituents, even hydrogen atoms, and their positions, which are further supported by X-ray crystallog. analyses and theor. calculations The generation of excimer emissions is observed in the tetradentate 5/6/6 Pt(II) emitters for the first time and found to be concentration-dependent both in the solution and solid states. All of the Pt(II) emitters have high photoluminescent quantum efficiency of up to 100% and luminescent lifetime as short as 1.4 μs at room temperature, achieving a radiative rate of 7.14 × 105 s-1. Their emission color can be easily tuned to cover the whole visible region (λmax = 464-632 nm) through selective synthetic modification of the heteroaromatic rings of the ligands. Pt(1-ptz)-based sky blue organic light-emitting diode (OLED) demonstrates a maximum external quantum efficiency (EQE) of 14.5%, yet maintains an EQE of 12.7% at a high brightness of 1000 cd/m2. This work demonstrates that these tetradentate Pt(II) complexes can act as efficient phosphorescent emitters for OLED applications. After reading the article, we found that the author used 3-Methoxyphenylboronic acid(cas: 10365-98-7Reference of 3-Methoxyphenylboronic acid)

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.Reference of 3-Methoxyphenylboronic acid

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

Related Products of 2398-37-0In 2019 ,《Olefin-accelerated solid-state C-N cross-coupling reactions using mechanochemistry》 was published in Nature Communications. The article was written by Kubota, Koji; Seo, Tamae; Koide, Katsumasa; Hasegawa, Yasuchika; Ito, Hajime. The article contains the following contents:

Here, a rational strategy for a general palladium-catalyzed Buchwald-Hartwig cross-coupling reactions between sec. amines and aryl halides in the solid state was reported. The key finding of this study was that olefin additives could act as efficient mol. dispersants for the palladium-based catalyst in solid-state media to facilitate the challenging solid-state cross-coupling. Beyond the immediate utility of this protocol, above strategy could inspire the development of industrially attractive solvent-free palladium-catalyzed cross-coupling processes for other valuable synthetic targets. After reading the article, we found that the author used 1-Bromo-3-methoxybenzene(cas: 2398-37-0Related Products of 2398-37-0)

1-Bromo-3-methoxybenzene(cas: 2398-37-0) can be used in chemical reaction as intermediates to obtain target materials such as dyes, pharmaceuticals, perfumes, photoinitiators and agrochemicals.Related Products of 2398-37-0

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

Application of 4637-24-5In 2021 ,《Photophysical and crystallographic study of three integrated pyrazolo[1,5-a]pyrimidine-triphenylamine systems》 appeared in Dyes and Pigments. The author of the article were Tigreros, Alexis; Macias, Mario; Portilla, Jaime. The article conveys some information:

Three new intramol. charge transfer (ICT) fluorophores having triphenylamine and pyrazolo[1,5-a]pyrimidine moieties 4a-c were synthesized, and their structures were solved by X-ray crystallog. (XRC). Compounds 4a, 4b and 4c crystallize in the tetragonal P42/n, triclinic P-1 and monoclinic P21/c space groups with calculated CE-B3LYP structural energies of -104.3, -125.6 and -123.8 kJ/mol, resp. Substituents effect on mol. and photophys. properties of 4a-c was studied in both solution and solid-state through fluorescence, UV-vis, XRC, and computational methods. The 2-Ph (4b) and 2-anisyl (2c) derivatives showed better absorption coefficient (4b, ε = 76400 → 119600 M-1cm-1 and 4c, ε = 66200 → 89200 M-1cm-1) than 4a (2-Me, ε = 9933 → 21667 M-1cm-1), while the relative quantum yield (φ) in solvents of diverse polarity is as high as φ = 0.98 for 4a, φ = 0.86 for 4b and φ = 0.83 for 4c. For these dyes, Lippert-Mataga correlation were used to estimate the difference between the excited and ground state dipole moments (Δμ), being 4b the one that suffer the bigger changes with a Δμ of 26.9 D. Probe 4c is found to be useful as a fluorescent indicators for the qual. sensing of water content in organic solvents. The solid-state emission data reveal that the antiparallel mol. packing of the crystal structure for 4a-c, with energy framework diagrams influenced mainly by dispersion forces, could disturbs the photophys. properties by changing the donor-acceptor intramol. coupling. Therefore, the combination of these XRC and photophys. results may constitute in a key input for designing applications in material science. The experimental part of the paper was very detailed, including the reaction process of N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5Application of 4637-24-5)

N,N-Dimethylformamide Dimethyl Acetal(cas: 4637-24-5) belongs to anime. In organic chemistry, amines are compounds and functional groups that contain a basic nitrogen atom with a lone pair. Amines are formally derivatives of ammonia (NH3), wherein one or more hydrogen atoms have been replaced by a substituent such as an alkyl or aryl group (these may respectively be called alkylamines and arylamines; amines in which both types of substituent are attached to one nitrogen atom may be called alkylarylamines).Application of 4637-24-5

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

In 2022,Kuhne, Irina A.; Ozarowski, Andrew; Sultan, Aizuddin; Esien, Kane; Carter, Anthony B.; Wix, Paul; Casey, Aoife; Heerah-Booluck, Mooneerah; Keene, Tony D.; Muller-Bunz, Helge; Felton, Solveig; Hill, Stephen; Morgan, Grace G. published an article in Inorganic Chemistry. The title of the article was 《Homochiral Mn3+ Spin-Crossover Complexes: A Structural and Spectroscopic Study》.Recommanded Product: 673-22-3 The author mentioned the following in the article:

Structural, magnetic and spectroscopic data on a Mn3+ spin crossover complex with Schiff base ligand 4-OMe-Sal2323, isolated in crystal lattices with five different counteranions, are reported. Complexes of [Mn(4-OMe-Sal2323)]X where X = ClO4- (1), BF4- (2), NO3- (3), Br- (4) and I- (5) crystallize isotypically in the chiral orthorhombic space group P21212 with a range of spin state preferences for the [Mn(4-OMe-Sal2323)]+ complex cation over the temperature range 5-300 K. Complexes 1 and 2 are high spin, complex 5 undergoes a gradual and complete thermal spin crossover, while complexes 3 and 4 show stepped crossovers with different ratios of spin triplet and quintet forms in the intermediate temperature range. High field ESR was used to measure the zero-field splitting parameters associated with the spin triplet and quintet states at temperatures below 10 K for complexes 4 and 2 with resp. values: Ds=1 = +23.38(1) cm-1, ES=1 = +2.79(1) cm-1 and DS=2 = +6.9(3) cm-1, with a distribution of E parameters for the S = 2 state. Solid state CD (CD) spectra on high spin complex 1 at room temperature reveal a 2:1 ratio of enantiomers in the chiral conglomerate, and solution CD measurements on the same sample in methanol show that it is stable toward racemization. Solid state UV-vis absorption spectra on high spin complex 1 and mixed S = 1/S = 2 sample 5 reveal different intensities at higher energies, in line with the different electronic composition The statistical prevalence of homochiral crystallization of [Mn(4-OMe-Sal2323)]+ in five lattices with different achiral counterions suggests that the chirality may be directed by the 4-OMe-Sal2323 ligand. In the part of experimental materials, we found many familiar compounds, such as 2-Hydroxy-4-methoxybenzaldehyde(cas: 673-22-3Recommanded Product: 673-22-3)

2-Hydroxy-4-methoxybenzaldehyde(cas: 673-22-3) is the main component of root bark essential oil of Periploca sepium Bunge. It is a potential tyrosinase inhibitor present in African medicinal plants. 2-Hydroxy-4-methoxybenzaldehyde was used in the synthesis of Schiff base ligand.Recommanded Product: 673-22-3

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

More, Sayaji Arjun; Kardile, Rahul Dadabhau; Kuo, Tung-Chun; Cheng, Mu-Jeng; Liu, Rai-Shung published their research in Organic Letters in 2021. The article was titled 《Gold Catalysts Can Generate Nitrone Intermediates from a Nitrosoarene/Alkene Mixture, Enabling Two Distinct Catalytic Reactions: A Nitroso-Activated Cycloheptatriene/Benzylidene Rearrangement》.Related Products of 2398-37-0 The article contains the following contents:

Gold-catalyzed reactions of cycloheptatrienes with nitrosoarenes yield nitrone derivatives efficiently. This reaction sequence enabled to develop gold-catalyzed aerobic oxidations of cycloheptatrienes to afford benzaldehyde derivatives using CuCl and nitrosoarenes as co-catalysts (10-30 mol %). D. functional theory calculations supported a novel nitroso-activated rearrangement, tropylium → benzylidene. With the same nitrosoarenes, gold-catalyzed [2 + 2 + 1]-annulations between nitrosobenzene and two enol ethers to yield 5-alkoxyisoxazolidines using 1,4-cyclohexadienes as hydrogen donors was developed. The experimental process involved the reaction of 1-Bromo-3-methoxybenzene(cas: 2398-37-0Related Products of 2398-37-0)

1-Bromo-3-methoxybenzene(cas: 2398-37-0) is a compound useful in organic synthesis and other chemical processes. It is an intermediate used for pharmaceuticals, perfumes and agrochemicals.Related Products of 2398-37-0

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

《A total synthesis of (+)-brazilin》 was published in Tetrahedron Letters in 2020. These research results belong to Huang, Shuangping; Ou, Wentao; Li, Wang; Xiao, Hesheng; Pang, Yiying; Zhou, Yi; Wang, Xiaoji; Yang, Xihua; Wang, Liping. Safety of m-Methoxyphenol The article mentions the following:

Described herein is a concise total synthesis of (+)-brazilin (I) from readily available 4-bromo-1,2-dimethoxybenzene. In this synthetic route, a Sharpless asym. dihydroxylation was employed to introduce the chiral hydroxyl group, and trifluoroacetic acid (TFA) catalyzed one-pot intramol. tandem Prins/Friedel-Crafts reaction was also involved as the key transformation in the construction of the hybrid chromane and indane framework. 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