Category: 3194-15-8

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Reduction of α-furyl ketones by chemical methods at different potentials. Properties and physical-chemical studies of the different compounds obtained》. Authors are Morizur, Jean Pierre; Wiemann, Joseph.The article about the compound:1-(Furan-2-yl)propan-1-onecas:3194-15-8,SMILESS:O=C(C1=CC=CO1)CC).Electric Literature of C7H8O2. Through the article, more information about this compound (cas:3194-15-8) is conveyed.

α-Furyl alkyl ketones were reduced by Zn (E0  0.75 v.) in AcOH, Mg (E0 = 2.5 v.) in AcOH, and Na amalgam (E0 = 2.7 v.) in H2O. The products were characterized by infrared (IR) and nuclear magnetic resonance (NMR) spectra. The following ketones were prepared by known methods [alkyl group and b.p. (mm.) given]: Me (I), 69° (15); Et (II), 74-6° (11); Pr (III), 96° (20). To a stirred suspension of 50 g. Zn in 500 ml. H2O at 50° was added over 3 hrs. 1 mole ketone in 100 g. AcOH simultaneously with 50 g. Zn and the mixture stirred 1 hr. to give the following results. I gave 2.5 g. IV, b0.05 80-2°, m. 121-2° (benzene), and 27.5 g. 2,3-di-2-furylbutane-2,3-diol (V), b0.05 92-4°. II and III gave, resp., 25 g. 3,4-di-2-furylhexane-3,4-diol (VI), b0.05 96-8°, and 28 g. 4,5-di-2-furyloctane-4,5-diol (VII), b0.05 104-6°. To a stirred mixture of 1 mole ketone in 500 ml. H2O at 100°, 72 g. Mg was added in small portions with dropwise addition of 400 g. 90% AcOH over 6 hrs. to give (from I) 5 g. IV, 27 g. V, and 32 g. VIII (R = Me), b0.05 102-5°, (from II) 30 g. VI, 36 g. VIII (R = Et), b0.05 106-9°, and (from III) 15 g. VII, 18 g. VIII (R = Pr), b0.05 111-13°. One mole I was reduced at -35° by 34.5 g. Na as an amalgam ( CA 55, 363d) to give 8 g. IV, 7 g. V, m. 47-8°, and 3 g. VIII (R  Me). Hydrogenation of IV by LiAlH4 in ice-cold Et2O gave IX, m. 98-100° (benzene). Similar treatment of the γ-ketols gave dihydroxy compounds melting over a 30-40° range.

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Category: benzoxazole. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 1-(Furan-2-yl)propan-1-one, is researched, Molecular C7H8O2, CAS is 3194-15-8, about 1,4-Addition in the furan series. I. Condensation of benzylmagnesium bromide with α-furyl ketones. Author is Berreby, Edgar; Morizur, Jean P.; Wiemann, Joseph.

A mixture of 27.5 g. 2-acetylfuran in 50 cc. ether was refluxed 1 hr. with PhCH2MgBr prepared from 42.75 g. PhCH2Br and hydrolyzed with HCl to give 10 g. of the starting material and 34 g. of a mixture, b0.01 82-92°. This mixture was redistilled to give 18% dibenzyl, b5 115-17°, 20% 1-phenyl-2-furyl-2-propanol, b5 123°, and 30% 2-acetyl-3-benzyl-2,3-dihydrofuran, b7 131°. Similar treatment of ethyl 2-furyl ketone gave 31.5 g. of a mixture containing 11% dibenzyl, 24% 1-phenyl-2-furyl-2-butanol, b6 136°, and 24% 2-propionyl-3-benzyl-2,3-dihydrofuran, b6 131°. N.M.R. and ir data are given.

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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 1-(Furan-2-yl)propan-1-one( cas:3194-15-8 ) is researched.Category: benzoxazole.Paravisini, Laurianne; Prot, Aurelie; Gouttefangeas, Cecile; Moretton, Cedric; Nigay, Henri; Dacremont, Catherine; Guichard, Elisabeth published the article 《Characterisation of the volatile fraction of aromatic caramel using heart-cutting multidimensional gas chromatography》 about this compound( cas:3194-15-8 ) in Food Chemistry. Keywords: caramel cooking aroma volatile furan lactone acid; Caramel; Heart-cutting multidimensional gas chromatography (MDGC); Mass Spectrometry; Odorant compounds; Olfactometry. Let’s learn more about this compound (cas:3194-15-8).

The first aim of the study was to improve characterization of the volatile fraction of aromatic caramel by applying heart-cutting multidimensional gas chromatog. coupled to mass spectrometry and olfactometry (MDGC-MS-O) on targeted odorant fractions. The second aim was to compare the volatile composition of two caramel samples, which differed in terms of their carbohydrate composition and cooking process. MDGC analyses enabled identification of 37 compounds (17 with the addition of pure standard) in the burnt sugar caramel, 20 of which were reported for the first time in caramel. Fifteen compounds were identified as odor-active and described using a range of attributes such as floral, roasted, spicy and almond. Furans, lactones and acids resulting from the thermal breakdown of sugars predominated in the volatile fraction of the burnt sugar caramel, due to the harsher cooking conditions. These results have enabled a clearer understanding of aromatic caramel as well as the identification of new compounds which might make an important contribution to its aroma.

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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.Robinson, Anthony L.; Boss, Paul K.; Heymann, Hildegarde; Solomon, Peter S.; Trengove, Robert D. researched the compound: 1-(Furan-2-yl)propan-1-one( cas:3194-15-8 ).Application of 3194-15-8.They published the article 《Development of a sensitive non-targeted method for characterizing the wine volatile profile using headspace solid-phase microextraction comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry》 about this compound( cas:3194-15-8 ) in Journal of Chromatography A. Keywords: wine flavor headspace solid microextraction GC MS. We’ll tell you more about this compound (cas:3194-15-8).

Future understanding of differences in the composition and sensory attributes of wines require improved anal. methods which allow the monitoring of a large number of volatiles including those present at low concentrations This study presents the optimization and application of a headspace solid-phase microextraction (HS-SPME) method for anal. of wine volatiles by comprehensive two-dimensional gas chromatog. (GC × GC) time-of-flight mass spectrometry (TOFMS). This study demonstrates an important advancement in wine volatile anal. as the method allows for the simultaneous anal. of a significantly larger number of compounds found in the wine headspace compared to other current single dimensional GC-MS methodologies. The methodol. allowed for the simultaneous anal. of over 350 different tentatively identified volatile and semi-volatile compounds found in the wine headspace. These included potent aroma compound classes such as monoterpenes, norisoprenoids, sesquiterpenes, and alkyl-methoxypyrazines which have been documented to contribute to wine aroma. It is intended that wine aroma research and wine sensory research will utilize this non-targeted method to assess compositional differences in the wine volatile profile.

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Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 3194-15-8, is researched, Molecular C7H8O2, about Cu-Catalyzed Sequential Dehydrogenation-Conjugate Addition for β-Functionalization of Saturated Ketones: Scope and Mechanism, the main research direction is copper catalyzed sequential dehydrogenation conjugate addition saturated ketone mechanism.Category: benzoxazole.

The first copper-catalyzed direct β-functionalization of saturated ketones is reported. This protocol enables diverse ketones to couple with a wide range of nitrogen, oxygen and carbon nucleophiles in generally good yields under operationally simple conditions. The detailed mechanistic studies including kinetic studies, KIE measurements, identification of reaction intermediates, EPR and UV-visible experiments were conducted, which reveal that this reaction proceeds via a novel radical-based dehydrogenation to enone and subsequent conjugate addition sequence.

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COA of Formula: 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 Differentiation of Volatile Profiles and Odor Activity Values of Turkish Coffee and French Press Coffee. Author is Amanpour, Asghar; Selli, Serkan.

Volatile compositions of coffee obtained from two different coffee brewing methods, Turkish coffee (TC) and French press coffee (FPC), were analyzed by the gas chromatog.-mass spectrometry technique. Liquid-liquid extraction with dichloromethane was used for extraction of volatile compounds A total of 60 and 58 volatile compounds comprising furans, lactones, phenolic compounds, pyridines, pyrazines, acids, cyclopentenes, pyrroles, furanones, ketones, alcs., aldehydes and thiols were identified and quantified in TC and FPC, resp. Among the detected compounds, furans were present in the highest levels, followed by lactones. Furfuryl alc. followed by γ-butyrolactone, pyridine, hexadecanoic acid, maltol, 2-Me pyrazine and furfuryl acetate were found in large amounts in both coffee brews. It was observed that the volatile profiles of both samples were quite similar. Based on the odor activity values (OAVs), 13 volatile compounds presented OAVs greater than 1 and guaiacol, 2,3-butanedione and furfuryl acetate were the highest OAVs in both coffee samples. Practical Applications : Coffee is one of the most widely consumed beverages in the world. The results of this first study provide valuable information for understanding the aroma and odor activity value differences between Turkish coffee and French press coffee. The liquid-liquid extraction technique for isolation followed by anal. and identification of those compounds by gas chromatog.-mass spectrometry is an effective practical application tool for volatile description in coffee samples. It was observed that the volatile profiles of both samples were quite similar.

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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 Parent ion spectroscopy in the identification of advanced glycation products, published in 1989-09-30, which mentions a compound: 3194-15-8, mainly applied to mass spectroscopy parent ion glycation product, Quality Control of 1-(Furan-2-yl)propan-1-one.

Advanced glycation products have been investigated by parent ion spectroscopy, employing B2/E = constant linked scans of furoyl ions obtained from hydrolyzed glycated albumin and polylysine mixtures, without any extraction procedures. Using such an instrumental approach, together with exact mass measurements and collision spectroscopy, the identification of 2-(2-furoyl)-4-hydroxy-1H-imidazole and 2-(2-furoyl)-4-carboxy-1H-imidazole among the advanced glycation products has been achieved.

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Benzoxazole – Wikipedia,
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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: 1-(Furan-2-yl)propan-1-one, is researched, Molecular C7H8O2, CAS is 3194-15-8, about Solid phase extraction in combination with comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry for the detailed investigation of volatiles in South African red wines.Application In Synthesis of 1-(Furan-2-yl)propan-1-one.

Comprehensive two-dimensional gas chromatog. in combination with time-of-flight mass spectrometry (GC × GC-TOFMS) has been applied for the anal. of volatile compounds in three young South African red wines. In spite of the significant benefits offered by GC × GC-TOFMS for the separation and identification of volatiles in such a complex matrix, previous results utilizing headspace solid phase micro extraction (HS-SPME) demonstrated certain limitations. These were primarily associated with the choice of sample preparation technique, which failed to extract some influential semi-volatile wine constituents. Therefore, in the current report, we utilized solid phase extraction (SPE) in combination with GC × GC-TOFMS for the detailed investigation of particularly low-level semi-volatiles in South African wine. 214 Compounds previously reported in grapes and related beverages were tentatively identified based on mass spectral data and retention indexes, while 62 addnl. compounds were pos. identified using authentic standards The method proved particularly beneficial for the anal. of terpenes, lactones and volatile phenols, and allowed us to report the presence of numerous volatile compounds for the first time in Pinotage wines.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《The acylation of furan and thiophene with aliphatic anhydrides in the presence of boron trifluoride etherate》. Authors are Heid, John V.; Levine, Robert.The article about the compound:1-(Furan-2-yl)propan-1-onecas:3194-15-8,SMILESS:O=C(C1=CC=CO1)CC).Recommanded Product: 3194-15-8. Through the article, more information about this compound (cas:3194-15-8) is conveyed.

The best yields (77%) of 2-acetylfuran, b6 45-8°, were obtained when 14 g. of redistilled BF3.Et2O was added all at once to 68 g. (1 mol.) furan and 123 g. (1.15 mols.) 95% Ac2O at 0°, the mixture stirred at room temperature 0.5 hr., hydrolyzed with 200 ml. H2O, and the product isolated in the usual way. In a similar manner, 81% 2-propionylfuran, b6 61-3°, 93% 2-butyrylfuran, b7 76-8°, 73% 2-acetylthiophene, b7 80-1°, 79% 2-propionylthiophene, b6 88-9° (semicarbazone m. 172.5-3.5°), and 89% 2-butyrylthiophene, b4 96°, were obtained. A possible reaction mechanism is proposed.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Analysis of the N.M.R. spectrum of phenylethane-1,2-dithiol》. Authors are Forbes, J. W.; Jungnickel, J. L..The article about the compound:1-(Furan-2-yl)propan-1-onecas:3194-15-8,SMILESS:O=C(C1=CC=CO1)CC).Formula: C7H8O2. Through the article, more information about this compound (cas:3194-15-8) is conveyed.

The N.M.R. spectrum of phenylethane-1,2-dithiol has been analyzed completely (except for the aromatic protons) by Reilly’s new computer program MARIPI which is based on the Swalen and Reilly (CA 57, 14612f) programs NMRIT and NMRENI. The geminal coupling constant, J34, was assumed to be neg. in accord with the recent theoretical and experimental evidence on the signs of (H,H) coupling constants. The magnitudes of the two vicinal H-C-C-H coupling constants, J35 and J45, indicate that the molecule exists primarily in the two forms with gauche-trans arrangements of the hydrogen atoms on these carbon atoms. The H-C-S-H coupling constants, J13, J14, and J25, can be either pos. or neg. in sign; however, a pos. sign is favored in line with the -, +, – pattern of sign-alternation for (H,H) coupling across 2, 3, and 4 bonds. The long-range coupling constants, J15, J23, and J24, are small and probably neg. The very long-range coupling between the S-H protons, J12, is too small to be determined

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