Category: 3194-15-8

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, Food Chemistry called Accelerating aroma formation of raw soy sauce using low intensity sonication, Author is Gao, Xianli; Liu, Ermeng; Zhang, Junke; Yang, Lixin; Huang, Qingrong; Chen, Sui; Ma, Haile; Ho, Chi-Tang; Liao, Lan, which mentions a compound: 3194-15-8, SMILESS is O=C(C1=CC=CO1)CC, Molecular C7H8O2, Computed Properties of C7H8O2.

Sonication was applied to accelerate aroma formation and shorten fermentation time of soy sauce. Effects of sonication at 68 kHz on the aroma and aroma-producing Zygosaccharomyces rouxii and Tetragenococcus halophilus in moromis were investigated using sensory evaluation, SPME-GC-olfactometry/MS, viable cell counting and SEM. The sensory scores of caramel-like, fruity, alc., floral, malty, smoky, sour and overall aroma in sonicated moromis were enhanced by 23.4%, 23.2%, 13.6%, 12.8%, 7.6%, 6.3%, 5.6% and 14.4%, resp. Sensory scores of samples fermented for 90-180 days were higher than those of controls fermented for 180 days, suggesting that sonication could reduce fermentation time by 90 days. Thirty-four aroma-active compounds were detected from 85 volatile compounds in soy sauces. Sonication accelerated and elevated the formation of aroma compounds by chem. reactions. It also markedly increased the reproduction and cell permeability of both microorganisms in moromis, which favored the formation of aroma compounds by both strains.

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Reference:
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 Conformational studies by dynamic nuclear magnetic resonance. Part 30. Exchange kinetics between the rotamers of 2-acylfurans and -thiophenes, the main research direction is rotation barrier acylfuran acylthiophene; acylfuran rotation barrier NMR; acylthiophene rotation barrier NMR; conformation acylfuran acylthiophene NMR; furan acyl conformation NMR; thiophene acyl conformation NMR.Recommanded Product: 1-(Furan-2-yl)propan-1-one.

Low-temperature 13C NMR spectra showed 2 different groups of signals, corresponding to the O,O-anti- and O,O-syn-rotamers, of 2-acylfurans I (X = O; R = H, Me, Et, CHMe2, CHEt2, CMe3). The ratios of these rotamers in Me2O were obtained; barriers for the syn-anti interconversion decrease with the increasing bulkiness of R. Although sep. 13C signals could not be detected for the rotamers of the corresponding 2-acylthiophenes I; (X = S, R = as before), line-broadening effects nonetheless allowed measurement of the interconversion barriers. Lanthanide-induced shift experiments carried out on the latter derivatives (at both 1H and 13C frequencies) showed that in all the 2-acylthiophenes investigated, the S,O-syn rotamers are predominant.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Ames, Jennifer M.; Guy, Robin C. E.; Kipping, Gary J. published the article 《Effect of pH, Temperature, and Moisture on the Formation of Volatile Compounds in Glycine/Glucose Model Systems》. Keywords: glycine glucose aroma compound Maillard reaction; extrusion cooking glycine glucose Maillard reaction.They researched the compound: 1-(Furan-2-yl)propan-1-one( cas:3194-15-8 ).Name: 1-(Furan-2-yl)propan-1-one. 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:3194-15-8) here.

Mixtures of glycine, glucose, and starch were extrusion cooked using sodium hydroxide at 0, 3, and 6 g/L of extruder water feed, 18% moisture, and 120, 150, and 180 °C target die temperatures, giving extrudates with pH values of 5.6, 6.8, and 7.4. Freeze-dried equimolar solutions of glucose and glycine were heated either dry or after equilibration to ∼13% moisture at 180°C in a reaction-tube system designed to mimic the heating profile in an extruder. Volatile compounds were isolated onto Tenax and analyzed by gas chromatog.-mass spectrometry. For the extrudates, total yields of volatiles increased with decreasing pH at 180°C, reached a maximum at pH 6.8 at 150°C, and increased with increasing pH at 120°C. Amounts increased with temperature at all pH values. Pyrazines were the most abundant class for all sets of conditions (54-79% of total volatiles). Pyrroles, ketones, furans, oxazoles, and pyridines were also identified. Yields of volatiles from the reaction-tube samples increased by >60% in the moist system. Levels of individual classes also increased in the presence of moisture, except pyrazines, which decreased ∼3.5-fold. Twenty-one of the compounds were common to the reaction-tube samples and the extrudates.

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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, Organic Letters called Modular Synthesis of Highly Substituted Pyridines via Enolate α-Alkenylation, Author is Hardegger, Leo A.; Habegger, Jacqueline; Donohoe, Timothy J., which mentions a compound: 3194-15-8, SMILESS is O=C(C1=CC=CO1)CC, Molecular C7H8O2, SDS of cas: 3194-15-8.

A novel methodol. for the synthesis of highly substituted pyridines e. g., I, based on the palladium-catalyzed enolate α-alkenylation of ketones is presented; the formation of aromatic compounds is a new direction for this catalytic C-C bond forming reaction. In the key step, a protected β-haloalkenylaldehyde participates in α-alkenylation with a ketone to afford a 1,5-dicarbonyl surrogate, which then undergoes cyclization/double elimination to the corresponding pyridine product, all in one pot. The β-haloalkenylaldehyde starting materials can be obtained from the corresponding methylene ketone via Vilsmeier haloformylation. Using this concise route, a variety of highly substituted pyridines were synthesized in three steps from com. available compounds

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Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Alkylation of furan with olefins. VI. Examination of products of alkylation of furan with olefins by gas chromatography》. Authors are Hillers, S.; Andersons, A.; Berzina, A..The article about the compound:1-(Furan-2-yl)propan-1-onecas:3194-15-8,SMILESS:O=C(C1=CC=CO1)CC).Category: benzoxazole. Through the article, more information about this compound (cas:3194-15-8) is conveyed.

cf. CA 59, 1564h, 5106g. Alkyl furans were identified by gas chromatography at 120-50° in a 3.3-m. long column filled with Celite 545 containing 25% silicone E 301 or dinonyl phthalate. The flow rate of the carrier gas (He) was 1.5 l./hr. The alkyl furans were identified by means of the relation between the log of the retention volume and the number of C atoms in the side chains. In the preparation of chromatographic standards the following new furan derivatives were prepared: 2-propionylfuran (I) hydrazone, b5 91°; I semicarbazone, m. 154°; 2-propyl-5-furylmercuri chloride, m. 99°; 2-butyrylfuran (II) hydrazone, b5 95°; II semicarbazone, m. 180-1°; 2-butyl-5-furylmercuri chloride, m. 77°.

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Benzoxazole – Wikipedia,
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So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Madruga, Marta Suely; Mottram, Donald S. researched the compound: 1-(Furan-2-yl)propan-1-one( cas:3194-15-8 ).Related Products of 3194-15-8.They published the article 《The effect of pH on the formation of volatile compounds produced by heating a model system containing 5′-IMP and cysteine》 about this compound( cas:3194-15-8 ) in Journal of the Brazilian Chemical Society. Keywords: IMP cysteine heating pH volatile compound. We’ll tell you more about this compound (cas:3194-15-8).

The identification of volatile compounds formed from the reactions of Inosine-5′-Monophosphate (5′-IMP) with Cysteine at three different pH (3.0; 4.5; 6.0) and 140 °C were performed using dynamic headspace anal. The results gave over 90 volatile compounds, mainly heterocyclic compounds, including sulfur containing furans, thiophenes, thiazoles, furans, alkyl sulfides, bicyclic compounds and cyclic sulfides. The studies showed that sulfur-substituted furans, mercaptoketones and alkylfurans were formed mainly at acidic pH, while pyrazines were completely inhibited at high pH. These findings support an earlier observation that pH has a great influence on volatile compounds formed in Maillard type reactions.

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Benzoxazole – Wikipedia,
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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: 3194-15-8, is researched, SMILESS is O=C(C1=CC=CO1)CC, Molecular C7H8O2Journal, Article, Research Support, Non-U.S. Gov’t, Organic Letters called Enantioselective Metal-Free Hydrogenations of Disubstituted Quinolines, Author is Zhang, Zhenhua; Du, Haifeng, the main research direction is quinoline chiral diene derived borane enantioselective diastereoselective hydrogenation catalyst; tetrahydroquinoline stereoselective preparation.Product Details of 3194-15-8.

A metal-free hydrogenation of 2,4-disubstituted quinolines was realized for the first time using chiral diene derived borane catalysts to furnish the corresponding tetrahydroquinolines in 75-98% yields with 95/5-99/1 dr’s and 86-98% ee’s. This catalytic system was also effective for 2,3-disubstituted quinolines to give moderate to good ee’s.

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Reference:
Benzoxazole – Wikipedia,
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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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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

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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Benzoxazole – Wikipedia,
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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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Reference:
Benzoxazole – Wikipedia,
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