Tag: M.W:100-200

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called An efficient method for the determination of furan derivatives in apple cider and wine by solid phase extraction and high performance liquid chromatography-Diode array detector, published in 2013-04-05, which mentions a compound: 3194-15-8, Name is 1-(Furan-2-yl)propan-1-one, Molecular C7H8O2, Electric Literature of C7H8O2.

A reliable SPE-HPLC/DAD method was developed for the simultaneous separation and quantitation of 10 furan derivatives in apple cider and wine matrixes, including 5-hydroxymethyl-2-furaldehyde (5-HMFD), 4-hydroxy-2,5-dimethyl-3(2H)-furanone (4-HDMF), 2-furoic acid (2-FA), 2-furaldehyde (2-F), 3-furaldehyde (3-F), 2-acetylfuran (2-AF), 5-methyl-2-furaldehyde (5-MFD), Me 2-furoate (MFT), 2-propionylfuran (2-PF) and Et 2-furoate (EFT). All the compounds were satisfactorily separated on a C18 column in less than 30 min. The solid phase extraction parameters have been optimized, including the sorbent, sample volume, washing and elution solvent. The relative standard deviations (RSDs) (intra- and inter-day) of all analytes were less than 6.4% for apple cider at 5 mg/L spiking level and less than 3.9% (except 2-FA) for wine at 0.5 mg/L spiking level. The limits of detection (LOD) and limits of quantitation (LOQ) were low (LOD 0.002-0.093 mg/L, LOQ 0.01-0.31 mg/L) compared to the usual concentrations of these compounds in these food matrixes. The absolute recoveries of all compounds were higher than 77.8% (most of them were 80.5-103%) at different spiking levels (apple cider 0.5-50 mg/L). The results showed that the developed method was precise, sensitive, robust and of good selectivity.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Shelkar, Radheshyam; Sarode, Sachin; Nagarkar, Jayashree published the article 《Nano ceria catalyzed synthesis of substituted benzimidazole, benzothiazole, and benzoxazole in aqueous media》. Keywords: phenylenediamine aldehyde nano ceria cyclocondensation catalyst; benzimidazole preparation green chem; aminothiophenol aldehyde nano ceria cyclocondensation catalyst; benzothiazole preparation green chem; aminophenol aldehyde nano ceria cyclocondensation catalyst; benzoxazole preparation green chem.They researched the compound: 2-Ethylbenzo[d]oxazole( cas:6797-13-3 ).Reference of 2-Ethylbenzo[d]oxazole. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:6797-13-3) here.

A series of substituted benzimidazoles, benzothiazoles, and benzoxazoles was synthesized by combining 1,2-phenylenediamine, 2-aminothiophenol, or 2-aminophenol with aryl, heteroaryl, aliphatic, α,β-unsaturated aldehydes in the presence of nano ceria (CeO2) as an efficient heterogeneous catalyst.

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Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1-(Furan-2-yl)propan-1-one, is researched, Molecular C7H8O2, CAS is 3194-15-8, about Effect of technological measures in malt, wort and beer production on aroma compounds relevant to beer aging, the main research direction is aroma compound malt wort beer production.Computed Properties of C7H8O2.

Several technol. parameters of brewing were investigated to evaluate the possible effects of the brewer on the flavor stability of beer. In these trials, beers were brewed on the pilot-scale. It was found that a higher proteolytic modification of the malt effected increased levels of compounds relevant to aging and produced an intensive aging aroma. Longer hot holding times of the wort in the whirlpool led to a deterioration of the flavor stability. Higher temperatures during the main fermentation brought an.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Electric Literature of C7H8O2. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1-(Furan-2-yl)propan-1-one, is researched, Molecular C7H8O2, CAS is 3194-15-8, about Isomerization of Allylic Alcohols to Ketones Catalyzed by Well-Defined Iron PNP Pincer Catalysts. Author is Xia, Tian; Wei, Zhihong; Spiegelberg, Brian; Jiao, Haijun; Hinze, Sandra; de Vries, Johannes G..

[Fe(PNP)(CO)HCl] (PNP=di-(2-diisopropylphosphanyl-ethyl)amine), activated in situ with KOtBu, is a highly active catalyst for the isomerization of allylic alcs. to ketones without an external hydrogen supply. High reaction rates were obtained at 80 °, but the catalyst is also sufficiently active at room temperature with most substrates. The reaction follows a self-hydrogen-borrowing mechanism, as verified by DFT calculations An alternative isomerization through alkene insertion and β-hydride elimination could be excluded on the basis of a much higher barrier. In alc. solvents, the ketone product is further reduced to the saturated alc.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Application In Synthesis of 2-Mercapto-5-methylbenzimidazole. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 2-Mercapto-5-methylbenzimidazole, is researched, Molecular C8H8N2S, CAS is 27231-36-3, about An expeditious microwave-assisted synthesis of mercapto benzazoles, quinazolinone and oxadiazoles. Author is Kumar, N. D. Mahesh; Dubey, P. K..

A simple, convenient, and high-yielding synthetic method for the preparation of mercapto derivatives of benzimidazoles, benzoxazole, benzothiazole, and quinazolinone as well as 5-substituted 1,3,4-oxadiazoles by the treatment of a series of O-, S-, and N-heteroatom-containing bifunctional mols., i.e. functionalized anilines and aromatic hydrazides, resp., with KS2COCHMe2 under microwave irradiation is described.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Journal of Organic Chemistry called Synthesis of Benzoxazoles from 2-Aminophenols and β-Diketones Using a Combined Catalyst of Bronsted Acid and Copper Iodide, Author is Mayo, Muhammad Shareef; Yu, Xiaoqiang; Zhou, Xiaoyu; Feng, Xiujuan; Yamamoto, Yoshinori; Bao, Ming, which mentions a compound: 6797-13-3, SMILESS is CCC1=NC2=CC=CC=C2O1, Molecular C9H9NO, Recommanded Product: 2-Ethylbenzo[d]oxazole.

Cyclization reactions of 2-aminophenols with β-diketones catalyzed by a combination of Bronsted acid and CuI are presented. Various 2-substituted benzoxazoles were obtained through these reactions. Different substituents such as Me, chloro, bromo, nitro, and methoxy on 2-aminophenol are tolerated under the optimized reaction conditions.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Category: benzoxazole. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 2-Mercapto-5-methylbenzimidazole, is researched, Molecular C8H8N2S, CAS is 27231-36-3, about Electrochemical study of 2-mercaptoimidazole as a novel corrosion inhibitor for steels. Author is Alvarez-Bustamante, R.; Negron-Silva, G.; Abreu-Quijano, M.; Herrera-Hernandez, H.; Romero-Romo, M.; Cuan, A.; Palomar-Pardave, M..

From electrochem. methods, polarization resistance and electrochem. impedance spectroscopy, the corrosion susceptibility of pipeline steel samples immersed in 1 M H2SO4 was determined using nil and different concentrations of the mol. 2-mercaptoimidazole (2MI). A corrosion inhibiting efficiency, IE, value of 98.5% was reached when the 2MI concentration in the system increased to 25 ppm. Also, at this concentration, the 2MI IE was measured as a function of time finding that the IE kinetics follows the relation: %IE = 98.5-0.03t after 800 h of evaluation. During the 1st 200 h 2MI IE was higher that 90% then, it decreased to 70% and it remained constant up to 1200 h. This compound can affect both the anodic and cathodic processes, thus it can be classified as a mixed-type inhibitor however, from variation of both corrosion potential and polarization resistance with [2MI] it was possible to state that the anodic reaction rate, of the corrosion process, decreases at a greater proportion than the cathodic one. 2MI follows an adsorption mechanism, which can be adequately described by the Langmuir isotherm with an adsorption standard free energy difference (ΔG°ads) of -26.8 kJ mol-1. To analyze the influence of substituting groups, both electron-donating and electron-attracting and the number of π-electrons on the corrosion inhibiting properties of organic mols., an electrochem. study was carried out on four different mols. having similar chem. framework structure: 2-mercaptoimidazole (2MI), 2-mercaptobenzoimidazole (2MBI) 2-mercapto-5-methylbenzimidazole (2M5MBI) and 2-mercapto-5-nitrobenzimidazole (2M5NBI). The IE order followed by the mols. tested was 2MI > 2MBI > 2M5MBI > 2M5NBI. Thus 2MI turned out to be the best inhibitor, even superior to the 2MBI. This fact strongly suggests that, contrary to a hitherto generally suggested notion, an efficient corrosion inhibiting mol. does not require to be a large one, also bearing an extensive number of π-electrons.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

COA of Formula: C9H9NO. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 2-Ethylbenzo[d]oxazole, is researched, Molecular C9H9NO, CAS is 6797-13-3, about Biomimetic Synthesis of Benzimidazoles, Benzoxazoles and Benzothiazole via the Group Transfer of Tetrahydrofolate Models. Author is Wen, Xueshan; Chen, Jianxin; Zhao, Yanqin; Chang, Xingmao; Ma, Jiachun; Zheng, Wenjun.

2-Substituted benzimidazoles, benzoxazoles I [R = Et, n-Pr, i-Pr, etc.; X = NH,O], and 2-cyclohexylbenzothiazole were prepared in good yields by biomimetic reaction of o-phenylenediamine/o-aminophenol/o-aminothiophenol with imidazolium iodides as tetrahydrofolate model compounds at the oxidation level of formate. The reaction probably involved nucleophilic addition to the C=N bond at the imidazolium ring followed a 1,3-H migration at imidazolidine intermediate and a salt elimination. This biomimetic synthesis method offers advantages such as good yields of products, easy work-up, mild reaction conditions without the use of oxidants, acid, catalyst or microwave irradiation

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 2-Ethylbenzo[d]oxazole, is researched, Molecular C9H9NO, CAS is 6797-13-3, about Synthesis and characterization of amino glucose-functionalized silica-coated NiFe2O4 nanoparticles: A heterogeneous, new and magnetically separable catalyst for the solvent-free synthesis of 2,4,5-trisubstituted imidazoles, benzo[d]imidazoles, benzo[d] oxazoles and azo-linked benzo[d]oxazoles.SDS of cas: 6797-13-3.

Amino glucose-functionalized silica-coated NiFe2O4 nanoparticles (NiFe2O4@SiO2@amino glucose) were chem. synthesized and characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), thermal gravimetric anal. (TGA), energy dispersive X-ray anal. (EDX), vibrating sample magnetometer (VSM), Zetasizer and Fourier transform IR spectroscopy (FT-IR) instruments. NiFe2O4@SiO2@amino glucose supply an environmentally friendly procedure for the synthesis of 2,4,5-trisubstituted imidazoles through one-pot multicomponent condensation of benzil or benzoin, ammonium acetate with aryl aldehydes and for the synthesis of benzoxazoles using condensation reaction of 2-aminophenol with aryl aldehydes under solvent free condition. In the other study, this synthesized magnetically reusable catalyst was introduced as a new avenue for the synthesis of benzo[d]imidazoles using the reaction between aryl aldehydes and 1,2-diaminobenzene. These compounds were obtained in high yields and short reaction times. The catalyst could be easily recovered and reused for five cycles with almost consistent activity. Synthesized compounds were characterized by their phys. constant, comparison with authentic samples, FT-IR, 1H NMR, 13C NMR spectroscopy and elemental anal.

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Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 27231-36-3, is researched, SMILESS is SC1=NC2=CC(C)=CC=C2N1, Molecular C8H8N2SJournal, Article, Toxicology Reports called Inhibitory and inductive effects of 4- or 5-methyl-2-mercaptobenzimidazole, thyrotoxic and hepatotoxic rubber antioxidants, on several forms of cytochrome P450 in primary cultured rat and human hepatocytes, Author is Miyajima, Atsuko; Kuroda, Yukie; Sakemi-Hoshikawa, Kazue; Usami, Makoto; Mitsunaga, Katsuyoshi; Irie, Tomohiko; Ohno, Yasuo; Sunouchi, Momoko, the main research direction is cytochrome P450 4MeMB 5MeMB hepatocyte Primary culture benzimidazole; 3-MC, 3-methylcholanthrene; 4(5)-MeMBI, 4(or 5)-methyl-2-mercaptobenzimidazole; 4-MeMBI, 4-methyl-2-mercaptobenzimidazole; 5-MeMBI, 5-methyl-2-mercaptobenzimidazole; AhR, aryl hydrocarbon receptor; Benzimidazole; CYP, cytochrome P450; Cytochrome P450; DMSO, dimethyl sulfoxide; Drug-metabolizing activity; EROD, 7-ethoxyresorufin O-deethylation; Hepatocyte; MBI, 2-mercaptobenzimidazole; PXR, pregnane X receptor; Primary culture; T6βH, testosterone 6β-hydroxylation.Product Details of 27231-36-3.

Effects of 4-methyl-2-mercaptobenzimidazole (4-MeMBI) and 5-methyl-2- mercaptobenzimidazole (5-MeMBI) on cytochrome P 450 (CYP) activity were examined in primary cultured rat hepatocytes. Hepatocytes from male Wistar rats were cultured in the presence of 4-MeMBI or 5-MeMBI (0-400μM), and the activity of CYPs 3A2/4 (48 and 96 h) and 1A1/2 (48 h) was determined by measuring the activity of testosterone 6β-hydroxylation and 7-ethoxyresorufin O-deethylation, resp. As a result, 4-MeMBI and 5-MeMBI (≥12.5μM) inhibited CYP3A2 activity. On the other hand, 4-MeMBI (≥25μM) and 5-MeMBI (≥100μM) induced CYP1A1/2 activity, being consistent with the previous in vivo results. In a comparative metabolism study using primary cultured human hepatocytes from two Caucasian donors, 4-MeMBI and 5-MeMBI induced the activity of CYPs 3A4 and 1A1/2 with individual variability. It was concluded from these results that 4-MeMBI, 5-MeMBI and MBI caused inhibition of CYP3A2 activity in primary cultured rat hepatocytes, suggesting their potential for metabolic drug-drug interactions. Primary cultured rat and human hepatocytes were considered to be useful for the evaluation of effects of the benzimidazole compounds on their inducibility and inhibitory activities of cytochrome P 450 forms.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem