Tag: M.W:100-200

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, Oriental Journal of Chemistry called Structural, thermal and electrical studies on some transition metal complexes with heterocyclic benzoyl hydrazones, Author is Ishwar, Krishan Mohan, which mentions a compound: 3194-15-8, SMILESS is O=C(C1=CC=CO1)CC, Molecular C7H8O2, Safety of 1-(Furan-2-yl)propan-1-one.

Complexes of Co(II), Ni(II) and Cu(II), [ML2] (HL = 2-propionylfuran benzoylhydrazone, 2-propionylthiophene benzoylhydrazone) were synthesized and characterized by elemental anal., IR, electronic and ESR spectral studies. All the complexes were found to have octahedral geometry from magnetic and electronic spectral data, where ligands bond in a tridentate manner using azomethine nitrogen, carbonyl oxygen and furyl oxygen/sulfur for coordination. EPR study on the Cu(II) complexes indicate appreciable covalent character in the metal-oxygen bond.

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Feng, Feng; Ye, Jia; Cheng, Zheng; Xu, Xiaoliang; Zhang, Qunfeng; Ma, Lei; Lu, Chunshan; Li, Xiaonian published an article about the compound: 2-Ethylbenzo[d]oxazole( cas:6797-13-3,SMILESS:CCC1=NC2=CC=CC=C2O1 ).Name: 2-Ethylbenzo[d]oxazole. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:6797-13-3) through the article.

The coupling of multi-step reactions catalyzed by a heterogeneous catalyst is an important path to accomplish some unconventional chem. transformations. Since the starting materials generated from previous steps were adsorbed on the catalyst, the activation energy of following steps was largely decreased, and thus the reaction conditions were more mild and environmentally friendly. Catalyzed by a multifunctional Cu-Pd/γ-Al2O3 catalyst, the transfer hydrogenation and successive cyclization coupling reaction from o-nitroaniline and alc. to afford benzimidazole derivatives I (R1 = H, CH3, OCH3, Cl, F; R2 = H, CH3, C2H5, n-Pr, Ph) in high yield was realized. The catalyst could be reused several times without loss of activity. The synergies of reforming hydrogenation of Cu-Pd bimetal and support acidity of γ-Al2O3 were responsible for this catalytic transformation.

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Synthetic Route of C7H8O2. 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: 1-(Furan-2-yl)propan-1-one, is researched, Molecular C7H8O2, CAS is 3194-15-8, about Identification of compounds responsible for the odorant properties of aromatic caramel. Author is Paravisini, Laurianne; Gourrat-Pernin, Karine; Gouttefangeas, Cecile; Moretton, Cedric; Nigay, Henri; Dacremont, Catherine; Guichard, Elisabeth.

Aromatic caramel results from the heat treatment of sugars under specific temperature conditions. Because of its richness in aroma compounds and its pleasant organoleptic properties, caramel is widely used in the food industry. However, the composition of the volatile odorant fraction has not been completely elucidated. The aim of this work was thus to identify the volatile odorant compounds responsible for caramel sensory properties using a multivariate statistical technique. Four aromatic caramels differing in terms of their carbohydrate composition and cooking process were chosen. Odorant compounds were screened by gas chromatog.-olfactometry (GC-O) and identified by GC-mass spectrometry (GC-MS). GC-O data were processed using a detection frequency method. A total of 76 odorant zones were detected and 49 aroma compounds identified, some of them being reported for the first time in caramel. In parallel, descriptive sensory profiles of the caramels were performed with a panel of ten trained assessors. Odor properties appeared to be closely related to the cooking properties of the caramel. The relationship between the intensities of sensory descriptors and the 76 odorant zones was modelled by partial least squares regression (PLS-R). The first PLS-R component explained 93% of the variance in sensory descriptors and 39% in GC-O data. Sensory descriptors were mainly separated on the first axis, opposing sweet-like descriptors (cooked-syrup, fruity, honey) to burnt sugar descriptors (strong, pungent, roasted). Heterocycles, carbocyclic compounds and acids appeared to be the principal odorants for burnt sugars. They were mainly described by empyreumatic notes in GC-O and correlated to burnt sugar descriptors in the PLS model. Copyright © 2012 John Wiley & Sons, Ltd.

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In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Application of multivariate statistics for the classification of coffee headspace profiles, published in 1984-02-29, which mentions a compound: 3194-15-8, mainly applied to coffee volatile substance statistic classification, Category: benzoxazole.

Applying a recently developed methodol. for coffee headspace anal., 15 coffees consisting of beans from 3 different origins and roasted at 5 predetermined levels were analyzed on repeated occasions, resulting in a collection of 55 capillary gas chromatog. headspace profiles. With the help of multivariate statistics, attempts have been made to classify these profiles into coffee variety and(or) roasting categories. First, stepwise discriminant anal. (SDA) was applied to select from the bulk of headspace components the most significant ones for discriminating the different profiles. The corresponding data subsets were then analyzed by canonical (CA) and discriminant anal. (DA). With use of only 9 components, the 55 profiles could be classified into the 15 coffee categories with a 90% success rate. Doubling the number of components brought the success rate to 98%. Profile assignment appeared to result from the combined information provided by components belonging to 4 chem. families; aliphatic aldehydes, furans, pyrroles or pyrazines, and thiophenes. From the point of view of coffee chem., the canonical anal. of headspace profiles also proved to be an interesting approach. Various information on the formation processes of the different components could be derived from their vector configuration in the canonical space.

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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: 6797-13-3, is researched, SMILESS is CCC1=NC2=CC=CC=C2O1, Molecular C9H9NOJournal, Article, Combinatorial Chemistry & High Throughput Screening called A Green and Efficient Protocol for the Synthesis of Quinoxaline, Benzoxazole and Benzimidazole Derivatives Using Heteropolyanion-Based Ionic Liquids: As a Recyclable Solid Catalyst, Author is Vahdat, Seyed Mohammad; Baghery, Saeed, the main research direction is ionic liquid preparation green chem benzimidazole benzoxazole.Product Details of 6797-13-3.

In this paper, the authors introduce two non-conventional ionic liquid compounds which are composed of propane sulfonate functionalized organic cations and heteropoly anions as green solid acid catalysts for the highly efficient and green synthesis of 2,3-disubstituted quinoxaline derivatives These ionic liquids are in the solid state at room temperature and the synthesis is carried out by a one-pot condensation reaction of various phenylenediamine derivatives with 1,2-diketone derivatives Benzoxazole and benzimidazole derivatives were also synthesized by these novel catalysts by a one-pot condensation from reaction orthoester with o-aminophenol (synthesis of benzoxazole derivatives) and phenylenediamine (synthesis of benzimidazole derivatives). All experiments successfully resulted in the desired products. The described novel synthesis method has several advantages of easy handling of reactants, mild reaction conditions, high yields, short reaction times, simplicity and easy workup compared to the traditional method of synthesis. The synthesis of the target compounds was achieved using as catalysts 1-methyl-3-(3-sulfopropyl)-1H-imidazolium tetracosa-μ-oxododecaoxo[μ12-[phosphato(3-)-κO:κO:κO:κO’:κO’:κO’:κO”:κO”:κO”:κO”’:κO”’:κO”’]]dodecatungstate(3-) (3:1) [1-methyl-3-(3-sulfopropyl)-1H-imidazolium tungstophosphate [PW12O403-]] and N,N,N-triethyl-3-sulfo-1-propanaminium tetracosa-μ-oxododecaoxo[μ12-[phosphato(3-)-κO:κO:κO:κO’:κO’:κO’:κO”:κO”:κO”:κO”’:κO”’:κO”’]]dodecatungstate(3-) (3:1) [1-methyl-3-sulfo-1-propanaminium tungstophosphate [PW12O403-]] as catalysts. The title compounds thus formed included 2,3-diphenylquinoxaline derivatives, 1H-benzimidazole derivatives, benzoxazole derivatives, dibenzo[a,c]phenazine, acenaphtho[1,2-b]quinoxaline, 2,5-dimethylbenzoxazole.

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Benzoxazole – Wikipedia,
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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 1-(Furan-2-yl)propan-1-one(SMILESS: O=C(C1=CC=CO1)CC,cas:3194-15-8) is researched.COA of Formula: C12H25NO5. The article 《Preparation of N-(1-Deoxy-Α-D-Xylulos-1-Yl)-Glutamic Acid via Aqueous Maillard Reaction Coupled with Vacuum Dehydration and Its Flavor Formation Through Thermal Treatment of Baking Process》 in relation to this compound, is published in Journal of Food Science. Let’s take a look at the latest research on this compound (cas:3194-15-8).

Amadori rearrangement product (ARP) derived from glutamic acid (Glu) and xylose (Xyl) was prepared by aqueous Maillard reaction. Subsequently, ion exchange chromatog., MS, and NMR were used for purification and identification, confirming that the mol. formula of ARP was C10H17NO8, namely N-(1-deoxy-α-D-xylulos-1-yl)-glutamic acid, with a mol. mass of 279 Da. To improve the aqueous yield of ARP, a thermal reaction coupled with vacuum dehydration was used and the yield of ARP was increased from 2.07% to 75.11%. Furthermore, flavor formation capacity of ARP by a thermal treatment simulated to a baking process was compared with Maillard reaction products, Maillard-dehydration reaction products, and Glu-Xyl mixture The results indicated that a larger amount of volatile flavor compounds and a biscuit-like, burnt aroma was generated rapidly from the mixture of ARP and unreacted Glu-Xyl, which could be a potential flavor enhancer for baked foods. Practical Application : Maillard reaction performed in aqueous medium through thermal reaction combined with vacuum dehydration is a novel and practical technol. that could be widely used to produce Maillard reaction intermediates (MRIs), such as Amadori or Heyns rearrangement products, which are regarded as significant nonvolatile aroma precursors and have stable phys. and chem. properties compared with Maillard reaction products (MRPs). MRI derived from glutamic acid and xylose is a potential substitute of MRPs for flavorings preparation and shows a great capacity to generate fresh flavors in a short time at high temperature, which meets the requirements of baking foods. Therefore, the new developed method could be a promising tool for MRI preparation and application in food and flavoring industries.

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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, Polymer Testing called High-density polyethylene as phase-change material: Long-term stability and aging, Author is Weingrill, H. M.; Resch-Fauster, K.; Lucyshyn, T.; Zauner, C., which mentions a compound: 27231-36-3, SMILESS is SC1=NC2=CC(C)=CC=C2N1, Molecular C8H8N2S, Recommanded Product: 27231-36-3.

Bulky high-d. polyethylene (HDPE) specimens containing different stabilization systems are exposed in air for up to 7200 h in the melt state to investigate the HDPE′s applicability as phase change material (PCM). Their thermo-oxidative stability is investigated. The maintenance of the storage capacity (heat of fusion) and the HDPE′s degradation behavior is monitored via Differential Scanning Calorimetry (DSC). Different aging phenomena of the thermo-oxidative exposure are investigated in more detail by means of Fourier-transform IR spectroscopy (FTIR) and polarized light microscopy (PLM). Only a small loss in the storage capacity upon thermo-oxidative exposure is detected. Therefore, HDPE proves to be a candidate material for polymeric PCM.

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Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

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 Expeditious and efficient synthesis of benzoxazoles, benzothiazoles, benzimidazoles catalyzed by Ga(OTf)3 under solvent-free conditions, published in 2011-08-31, which mentions a compound: 6797-13-3, Name is 2-Ethylbenzo[d]oxazole, Molecular C9H9NO, Computed Properties of C9H9NO.

A new and efficient method for the synthesis of benzoxazoles, benzothiazoles, benzimidazoles by cyclocondensation of o-substituted aminoaroms. with ortho esters in the presence of catalytic amounts of Ga(OTf)3 under solvent-free conditions is presented. The remarkable features of this new protocol are high conversion, very short reaction times, cleaner reaction profiles under solvent-free conditions, straightforward procedure, and use of a relatively non-toxic catalyst.

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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-Mercapto-5-methylbenzimidazole, is researched, Molecular C8H8N2S, CAS is 27231-36-3, about Corrosion inhibition of steel in crude oil storage tanks.Related Products of 27231-36-3.

The corrosion behavior of steel in water from certain oil fields with various organic inhibitors was studied by applying potentiodynamic technique at pH 5.9. The inhibitors which were used include 2-methylbenzimidazole (I), 2-mercaptobenzimidazole (II), 2-mercapto-5-methylbenzimidazole (III), and 2-mercaptothiazole (IV). The inhibiting efficiency of the different additives was evaluated from their anodic and cathodic polarization curves at different temperatures A comparative study of curve fitting procedures using the kinetic thermodn. model and those utilizing well-known adsorption isotherms was undertaken. Three types of isotherms were used, Langmuir, Frumkin and Flory-Huggins isotherm. The kinetic-thermodn. model and Flory-Huggins isotherms are more suitable to fit the data for the four inhibitors, at all applied temperatures From the values of binding constants, K, the order of inhibitor efficiency is: III > IV > II > I. And thus 2-mercapto-5-methylbenzimidazole was the most effective inhibitor. The thermodn. parameters obtained for all the compounds used showed low values of Hads, which indicates that the action of these inhibitors is phys. adsorptive in nature.

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SDS of cas: 6797-13-3. 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 Graphene oxide as a heterogeneous reagent promoted synthesis of 2-substituted 1,3-benzazoles in water. Author is Khalili, Dariush; Banazadeh, Ali Reza.

An efficient chem. method for the synthesis of benzimidazoles, benzothiazoles, and benzoxazoles has been developed through the condensation of various aldehydes with o-phenylenediamine, o-aminothiophenol, and o-aminophenol using graphene oxide (GO) as an oxidant in water. These benzazoles are also prepared through a one-pot oxidation/condensation tandem process by reacting alcs. with 2-amino-(thio)phenol/aniline in the presence of GO in poly(ethylene glycol) as a safe media. Moreover, this carbonaceous material could be readily separated using a simple filtration.

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