Category: 3194-15-8

SDS of cas: 3194-15-8. 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: 1-(Furan-2-yl)propan-1-one, is researched, Molecular C7H8O2, CAS is 3194-15-8, about Model reactions on roast aroma formation. VI. Volatile reaction products from the reaction of phenylalanine with glucose during cooking and roasting. Author is Baltes, Werner; Mevissen, Lutz.

After roasting a reaction mixture consisting of D-glucose and phenylalanine, 155 volatile products were isolated and identified by Et2O extraction and high resolution gas chromatog./mass spectrometry. Among them, 64 furans, 43 aromatic benzoic compounds, 17 aliphatic compounds, 11 carbocyclic compounds, 3 pyrones, 10 pyrazines, 6 pyrroles, and 3 pyridines were identified. After cooking the model mixture, only 64 compounds were identified. Aromatic benzoic compounds were the specific products of phenylalanine, which are predominantly formed by phenylacetaldehyde.

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Reference:
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 The preparation of some ketones in the furan ring, published in 1930, which mentions a compound: 3194-15-8, Name is 1-(Furan-2-yl)propan-1-one, Molecular C7H8O2, Synthetic Route of C7H8O2.

M. prepared several ketones of the furan ring in the following way: The diethylamide of the pyromucic acid was prepared from the acid chloride and NHEt2. EtMgBr and PrMgBr were allowed to react upon the diethylamide, giving 80-85% of the corresponding ketones. The Et and Pr furyl ketones so formed were found to be identical with those prepared by Asahina and Murayama. The pyromucyl chloride was prepared by treating the acid with SOCl2 (yield 40%) or better with PCl5 (yield 70-80%).

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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 Model reactions on roast aroma formation. II. Mass spectrometric identification of furans and furanones from the reaction of serine and threonine with sucrose under the conditions of coffee roasting. Author is Baltes, Werner; Bochmann, Gloria.

From model roastings of mixtures containing serine, threonine, and sucrose about 350 volatile compounds were separated and identified. Among them there were >100 monocyclic furans, 13 furanones, and 8 bicyclic furans, the mass spectra and retention index of which are recorded. The most important mass spectrometric fragmentation pathways are described. Spectra obtained from roasting coffee under identical conditions are compared with the spectra from model roastings.

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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, Journal of Food Composition and Analysis called Impact of ecological”” post-harvest processing on coffee aroma: II. Roasted coffee, Author is Gonzalez-Rios, Oscar; Suarez-Quiroz, Mirna L.; Boulanger, Renaud; Barel, Michel; Guyot, Bernard; Guiraud, Joseph-Pierre; Schorr-Galindo, Sabine, which mentions a compound: 3194-15-8, SMILESS is O=C(C1=CC=CO1)CC, Molecular C7H8O2, Reference of 1-(Furan-2-yl)propan-1-one.

The purpose of this study was to determine how water and microbial stages in post-harvest processing affect the volatile content of coffee. Following our aroma anal. carried out on green coffees, we turned our attention to roasted coffees. Coffees produced by three variants of the wet method, and by an ecol. process, were compared after roasting. Three degrees of roasting were applied to gain a clearer picture of the differences in roasted coffee aromas by means of a volatile compound anal. Changes in the post-harvest process actually led to aroma differences in roasted coffees, and with light roasting it was possible to more effectively distinguish between the four treatments based on aroma criteria. Coffee produced by the traditional wet method, with microbial stages, had a better aroma quality than coffee produced by the ecol. method, which was purely mech. Moreover, in the microbial method, mucilage removal under water gave coffees with more fruity, floral and caramel notes, whereas dry mucilage removal gave more neutral coffees. These results confirmed the importance of microbial mucilage removal under water and tallied with the results of our previous study on green coffee. This work provides coffee producers and roasters with an insight into the volatile composition of roasted coffee depending on the post-harvest process used and degree of roasting applied.

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Reference:
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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Fermentation products of wheat germ. (a) Identification of methoxy- and 2,6-dimethoxy-p-benzoquinone. (b) Infrared absorption of some quinones and 1,2-dicarboxyl compounds》. Authors are Cosgrove, D. J.; Daniels, D. G. H.; Whitehead, J. K.; Goulden, J. D. S..The article about the compound:1-(Furan-2-yl)propan-1-onecas:3194-15-8,SMILESS:O=C(C1=CC=CO1)CC).Synthetic Route of C7H8O2. Through the article, more information about this compound (cas:3194-15-8) is conveyed.

The compounds isolated by Vuataz (C.A. 44, 7896g) from wheat germ fermented with baker’s yeast have been identified as methoxy-p-benzoquinone and 2,6-dimethoxy-p-benzoquinone. 1-(2-Furyl)acetone (I) was prepared in 33% yield by hydrolyzing and decarboxylating the compound formed by condensing MeCHClCO2Et (Frankland and Garner, C.A. 8, 2361) and furfuraldehyde (Darzens, Compt. rend. 142, 214(1906)). I (15 g.) was added to 13.6 g. SeO2 in 75 ml. dioxane and 2.5 ml. H2O at 50°, the mixture refluxed 4 hrs., the Se filtered off, the solvent removed in vacuo from the filtrate, and the residue chromatographed in CHCl3 on Al2O3; elution with CHCl3 gave 2.9 g. 1-(2-furyl)-1,2-propanedione (II), b16 94-5°, m. 64-5°. Furan (46 g.) acylated at 10-15° with 102 g. (EtCO)2O and 1.2 ml. HI (d. 1.70) (Hartough and Kosak, C.A. 41, 1661d), gave 43% 2-propionylfuran (Gilman and Calloway, C.A. 27, 5738), which was oxidized with SeO2 as before; the reaction was still incomplete after 5.5 hrs., refluxing, but 1.4 g. II, m. 60-1°, was ultimately obtained. 2-Methylfuran (Kizhner, C.A. 26, 5299) acylated at 0-10° by the use of HI (d. 1.70) and worked up as above gave 5-methylfurylglyoxal, b20 109-10°. Infrared spectra of some p-benzoquinones, glyoxals, and 1,2-diketones are presented.

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Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

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.Application In Synthesis of 1-(Furan-2-yl)propan-1-one.Heathcock, Clayton H.; Gulick, L. Gray; Dehlinger, Thomas published the article 《Reaction of furyllithium with carboxylic acids》 about this compound( cas:3194-15-8 ) in Journal of Heterocyclic Chemistry. Keywords: furan acylated; acylated furan. Let’s learn more about this compound (cas:3194-15-8).

α-Furyllithium (prepared via BuLi) is treated with acids RCO2H to give mixtures of 2-furyl ketones [2-(RCO-substituted)-furans] (I) and difurylcarbinols [bis(2-furyl)-(R-substituted)-carbinols] (II). The I-II ratio is >1; N.M.R. spectral data for II are given.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Janda, Miroslav; Kurc, Jozef published an article about the compound: 1-(Furan-2-yl)propan-1-one( cas:3194-15-8,SMILESS:O=C(C1=CC=CO1)CC ).Electric Literature of C7H8O2. 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:3194-15-8) through the article.

So-called junipal (5-(1-propynyl)-2-thiophenecarboxaldehyde) was compared with 5-propionyl-2-thiophenecarboxaldehyde and similar compounds of the furan and thiophene series in inhibiting the growth of E. coli B. The biol. activity of junipal seemed to be very sensitive to structural changes. The tested compounds were 2-(R1-substituted)-5-(R2-substituted)thiophenes (I) and 2-(R1-substituted)-5-(R2-substituted)furans (II), with R1 and R2 in I being, resp., HCO, MeCC; HCO, EtCO; H, MeCC; H, EtCO; H, MeCH:CH; H, EtCH(OH); H, MeCO; H, CHO; CO2H, Et; and in II, H, EtCO; H, EtCH(OH); CO2H, CH2CO2H; CO2H, CH:CHCO2H. A new method was used for preparation of II (H, EtCO): reaction of EtMgBr with the Na salt of 2-furoic acid. The toxicity of junipal against E. coli was relatively high. Each structural change of junipal was accompanied by diminution of the inhibition.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

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 Furan compounds. III. A new synthesis of furyl ketones, published in 1950, which mentions a compound: 3194-15-8, mainly applied to , Safety of 1-(Furan-2-yl)propan-1-one.

cf. C.A. 44, 2973d. Several furyl ketones were synthesized from furyl aldehydes and diazoalkanes as starting materials. The aldehydes were treated in dry Et2O, free of alcs., with 1.5 equivalents diazoalkane at room temperature for 2-14 days and the ketones distilled The following ketones are reported: 2-acetylfuran (70-75% yield), from furfural (I) and CH2N2 (II) after 12 days, b. 169-73° (semicarbazone, m. 148°); 2-propionylfuran, in nearly quant. yield from I and MeCHN2 (III) in 2-3 days, b. 182-3°, m. 28-30° (semicarbazone, m. 189°); 5-methyl-2-propionylfuran (IV), in nearly quant. yield from 5-methylfurfural and III in 2-3 days, b14 94-6° (semicarbazone, m. 162-4°; oxime, prepared by boiling 1.5 g. ketone, 1 g. HONH2.HCl, and 1 g. AcONa for 4 h., and addition of H2O, m. 110°); 5-hydroxymethyl-2-acetylfuran, prepared in 40% yield from 5-(hydroxymethyl)furfural and II after 14 days, b. 130° [semicarbazone, m. 194° (from dilute EtOH)]. IV is a new compound 5-Methylfurfural remained unchanged after 3 wk with I in Et2O.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

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 Flavor stability of alternative malt-based beverages, the main research direction is malt based beverage flavor.Electric Literature of C7H8O2.

In recent years the market share for alternative malt-based beverages has grown as consumers look for alternative, new, and refreshing products. To date, however, no information has been gathered about the flavor stability of such beverages. In this work, stale flavor compounds in com. and pilot-scale malt-based beverages were analyzed and compared with appropriate sensory results. The study showed that the aging of flavored malt-based beverages can be described by changes in the contents of 3-methylbutanal, 2-furfural, benzaldehyde, phenylacetaldehyde, hexadienal, heptanal, methional, and β-damascenone, with an index increase from 4.097 μmol/L in fresh samples to 4.899 μmol/L in aged samples. The aging indicator value determined for novel malt-based beverages was confirmed in pilot-scale lactic acid-fermented beverages. In unfermented malt beers, the aging process can be described by the sum of the Strecker aldehydes 2- and 3-methylbutanal and phenylacetaldehyde and the thermal indicator methylfurfural. During simulated aging, an increase of 181 nmol/L was observed

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

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.Category: tetrahydropyran. The article 《Merlin – a new wort boiling system》 in relation to this compound, is published in Technical Quarterly – Master Brewers Association of the Americas. Let’s take a look at the latest research on this compound (cas:3194-15-8).

Merlin is a new type of boiling system. It is not an enhanced development of already existing boiling systems, but rather it is a completely new type of system. The boiling system was designed as a boiling and stripping system. Only with the stripping function is it comparable to conventional boiling systems. The wort is pumped from the lauter turn into the whirlpool and there with the aid of a pump, it passes across a heated cone. While it is flowing across the cone, the wort is heated gently but highly efficiently since the wort layer is thin. Undesirable aroma substances are hereby expelled. The heated wort then flows back into the lauter tun. This procedure is repeated four to six times. Hot trub is continually ejected during the heating up and boiling process. After a brief whirlpool rest period, the wort passes across the heated cone with reduced flow and is transferred to the plate heat exchanger. The free DMS is thereby almost completely expelled. Wort parameters such as DMS, TBN, COAG, hop isomerization and the composition of the aroma substances lie within a desirable brewing technol. framework. The boiling system accomplishes this with an overall evaporation rate of only 4%. There is only slight coating of the boiler. This results in min. need for cleaning. The greatly reduced evaporation saves on water and waste water. By regulating the temperature of the heated cone and the wort amount flowing across it, it is possible to exert direct influence on the individual wort parameters as desired. The beer types produced proved excellent in comparisons.

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Reference:
Benzoxazole – Wikipedia,
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