Category: 3194-15-8

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 Rh/Cu-Catalyzed Ketone β-Functionalization by Merging Ketone Dehydrogenation and Carboxyl-Directed C-H Alkylation, the main research direction is rhodium copper catalyzed ketone dehydrogenation carbon hydrogen alkylation; dehydrogenation alkylation ketone carboxylic acid TEMPO agent.Electric Literature of C7H8O2.

An efficient Rh/Cu-catalyzed method has been developed for the direct β-arylation or alkenylation of ketones using (hetero)aryl or alkenyl carboxylic acids as coupling partners. This direct ketone β-functionalization reaction proceeded via the merging of Cu-catalyzed ketone dehydrogenative desaturation and Rh-catalyzed carboxyl-directed C-H alkylation, exhibiting a broad substrate scope for both coupling partners. TEMPO proved to be essential for both dehydrogenation process and generation of the active Rh catalyst for C-H activation.

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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: 1-(Furan-2-yl)propan-1-one, is researched, Molecular C7H8O2, CAS is 3194-15-8, about Yeast vitality and beer quality.Computed Properties of C7H8O2.

The relationship between yeast vitality and beer quality was studied through fermentation and storage tests on a pilot scale. The yeast vitality was determined precisely by measuring the intracellular pH value. Clear fluctuations in yeast vitality were seen in dependence of the storage temperature of the yeast. The critical value was a storage temperature of 4°. Corresponding to the yeast vitality there were clear differences in the fermentation speed and FAN consumption. The brightening of the wort with fermentation and the concentration of the vicinal diketone of the beer were influenced in such cases by the vitality of the yeast used for fermentation The beer froth was poorer and also the concentration of medium chain fatty acids and the protease activity of the beer increased when less vital yeast was used.

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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 《Furyl alkyl ketones》. Authors are Monoya, K..The article about the compound:1-(Furan-2-yl)propan-1-onecas:3194-15-8,SMILESS:O=C(C1=CC=CO1)CC).Related Products of 3194-15-8. Through the article, more information about this compound (cas:3194-15-8) is conveyed.

For the study of the relation between the chem. constitation of furyl alkyl ketones and their optical properties and also of the chem. action of alkyl nitrites and Na toward the ketones, the present study was carried out by M. The furyl alkyl ketones were prepared from furfural nitrite by the methods of Blaise (Compt. rend. 132, 38; 133, 299) and Kabina and Murayama, viz., Mg and the alkyl halide in dry Et2O was added to the nitrite in Ft2O; after the reaction was completed, the whole mixture was warmed, treated with H2SO4 and little H2C2O4 and then decomposed with steam. Thus, the following substances were prepared: C4H3O.COMe, C4H3OCOEt, C4H3OCOPr, iso-BuCOC4H3O, iso-AmCOC4H3O. Ethyl furoyldimethylacetate, light yellow liquid, b20 138-41°; furyl benzyl ketone, plates, m. 47-8°, solublein Et2O, difficultly sel. in alc.; oxime, m. 125-6°, soluble in alc., Et2O, petr. ether, C6H6; semicarbozone, m. 171-2°, difficultly soluble in alc. and insoluble in H2O. M. got pure ketones by transforming them into their oximes. During the preparation of furyl isobutyl and furyl isoamyl ketones, M. succeeded in isolating ketamines corresponding to each ketone, as a double salt with NH4Cl, (C4H3O.C(:NH)C4H9)2NH4Cl, m. 285-91°; (C4H30C(:NH)C5H11)2-NH4Cl, m. 268-70°, which by treatment with HCl easily yield ketones. So, the formation of ketone from nitrite may be represented by the following scheme: RCN + R’MgBr → RCR’:N.MgBr → RR’C:NH → RCOR’. The optical properties of the ketones studied by M. are shown in the table: , d4., nD., Mol. reference, Exaltation.;C4H3OCOMe ……………, 1.0977 (29.3°), 1.50177, 29.57, 1.14;C4H3O.COEt………………, 1.0587(29.5°), 1.49623, 34.25, 1.20;C4H3O.COPr………………, 1.0416(11.4°), 4.49970, 38.97, 1.31;C4H3O.COC4H9……………, 1.0160(14.6°), 1.49488, 43.64, 1.36;C4H3O.COC5H11……………, 0.9988(11°), 1.49260, 48.31, 1.41; The exaltation of the ketones increases with increasing mol. weight The action of alkyl nitrite and Na on the ketones was studied carefully by M. 7 g. furyl benzyl ketone in 50 cc. absolute Et2O and 3.5 g. EtNO2 and 0.8 g. Na at -13°, were neutralized with 1% NaOH, extracted with Et2O, and the H2O solution saturated with CO2 and then acidified with HCl, successively. 2 g. Et pyromucate, 1.4 g. pyromucic acid, 1.6 g. β-benzaldoxime and 1 g. isonitrosodesoxybenzofuroin, m. 127-30°, were isolated and identified. M. also obtained valeraldoxime from furyl amyl ketone. On applying the same reactions to the other ketones, he obtained the following results: , Ester., Free acid., Isonitroso compounds, Aldoxime.;PhCOBz;-10° ……………….., 37.6%, 28.1%, 28.3%, 16;5-10°………………, 11.4%, 38.6%, 40.1%, small;15°………………, 13.7%, 41.1%, 43.6%, small;PhCOEt………………, 10.5%, 50.5%, 24.7%, ..;PhCH:CHCH:CHCOMe……….., …., 30%, …., ..; By the action of AmNO2 and Na on menthone was obtained 2,6-dimethyl-3-ketoöctoic acid, isolated as the semicarbazone, m. 151-2°. The mechanism of the reaction between alkyl nitrite and Na and furyl ketone, may be represented in the following scheme:

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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.Recommanded Product: 1-(Furan-2-yl)propan-1-one.Guillen, Maria D.; Manzanos, Maria J. published the article 《Smoke and liquid smoke. Study of an aqueous smoke flavouring from the aromatic plant Thymus vulgaris L》 about this compound( cas:3194-15-8 ) in Journal of the Science of Food and Agriculture. Keywords: thyme smoke flavor composition. Let’s learn more about this compound (cas:3194-15-8).

An aqueous smoke flavoring from Thymus vulgaris L was obtained. The qual. and quant. composition of its dichloromethane extract was studied by gas chromatog. and gas chromatog./mass spectrometry. In addition to the common smoke components such as aldehydes, ketones, diketones, esters, acids, furan and pyran derivatives, alkyl aryl ethers, phenol, guaiacol and syringol derivatives, some terpenic compounds were detected. Differences between this aqueous liquid smoke and others from various kinds of wood are due not only to the absence or presence of some compounds but also to the proportions of the different groups of components present in the mixture Some aldehydes, esters, guaiacol and its derivatives and terpenic compounds contribute to the overall odor of this liquid smoke more significantly than the ketones, furan and pyran derivatives, acids, phenol and its derivatives and syringol. The yield in smoke components obtained from the pyrolysis of Thymus vulgaris L at 488°C is of a similar order to that obtained from other woods.

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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.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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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, Zhurnal Obshchei Khimii called Catalytic hydrogenation of furan and sylvan in the presence of a nickel-aluminum catalyst, Author is Shuikin, N. I.; Bunina, V. I., which mentions a compound: 3194-15-8, SMILESS is O=C(C1=CC=CO1)CC, Molecular C7H8O2, Recommanded Product: 1-(Furan-2-yl)propan-1-one.

cf. C. A. 31, 8529.3. Furan and α-methylfuran hydrogenate smoothly to the tetrahydro compounds when passed with H at 120-40° over a Ni-Al catalyst (27% Ni + 73% Al) activated by treatment with 10% NaOH. The catalyst showed no signs of fatigue after repeated hydrogenations.

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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 Synthesis of organic γ-oxides by catalytic hydrogenation of the furan nucleus, published in 1938, which mentions a compound: 3194-15-8, mainly applied to , Product Details of 3194-15-8.

cf. preceding abstract α-Propionylfuran (I) was prepared in 37.6% yield by condensation of EtCOCl and furan with excess AlCl3 in CS2. I, m. 28.5-9.5°, b20 86.2°; semicarbazone, m. 177-8°. A mixture of 45 g. I in 80 ml. of absolute alc. with 24 g. of 90% H2NNH2.H2O in 40 ml. alc. was refluxed on a water bath for 4 hrs. and the alc. was distilled off. The hydrazone was decomposed by heating it with 1.5 g. of powd. KOH and a little platinized kaolin, giving 43.5% α-propylfuran, b750 114.5-15.5°, d420 0.8905, nD20 1.4459, M. R. 32.96. Passing it with H over Pd deposited on asbestos at 150° gave α-propyltetrahydrofuran, b756 132-3°, d420 0.8548, nD20 1.4242, M. R. 34.08. AcCl and α-methylfuran with AlCl3 in CS2 gave 28.3% α-methyl-α’-acetylfuran, b7 69-70°, d419 1.0574, nD19 1.5123; semicarbazone, m. 171°. Its hydrazone when decomposed with KOH and Pt formed 59.6% α-methyl-α’-ethylfuran, b742 116-18°, d420 0.8883, nD20 1.4473, M. R. 33.13. Hydrogenated as above, it gave α-methyl-α’-ethyltetrahydrofuran, b756 118-19°, d420 0.8326, nD20 1.4144, M. R. 34.28. The activity of the Pd catalyst is increased by the presence of KOH impurities.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Related Products of 3194-15-8. 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 Inhibition effects of Maillard reaction products derived from L-cysteine and glucose on enzymatic browning catalyzed by mushroom tyrosinase and characterization of active compounds by partial least squares regression analysis. Author is Xu, Haining; Zhang, Xiaoming; Karangwa, Eric.

Inhibition of tyrosinase activity by Maillard reaction products derived from cysteine and glucose (Cys-MRPs) was studied. Pre-incubation of mushroom tyrosinase with Cys-MRPs decreased enzyme activity with increasing reaction time. We show that Cys-MRPs irreversibly block the active site of mushroom tyrosinase and that the competitive inhibitors dithiothreitol and kojic acid protect the enzyme from Cys-MRPs inactivation. Correlation of tyrosinase inhibition ability, volatile compounds, non-volatile compounds (HMF, DDMP and maltol), and Maillard reaction conditions of Cys-MRPs was analyzed by partial least squares regression (PLSR). 3-Ethyl-2-formylthiophene, α-dimethylformylthiophene, 2,6-dimethylpyrazine, ethylpyrazine, 2-ethyl-6-methylpyrazine, 2-methyl-3-(2-thienyldithio) thiophene, and furfural showed a significant and pos. contribution to inhibition ability, while 2-propionylfuran and α-dimethyl-2-formylfuran showed a significant but neg. correlation with inhibition ability. Of the three non-volatile compounds analyzed, only 2,3-dihydro-3,5-dihydroxy-6-methyl-4(H)-pyran-4-one (DDMP) showed a significant and pos. correlation with inhibition ability, while HMF and maltol showed a weak neg. correlation. The reaction temperature and time showed a significant and pos. correlation with inhibition rate, whereas the ratio of sugar to amino acid showed a neg. effect within the exptl. range.

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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: 3194-15-8, is researched, SMILESS is O=C(C1=CC=CO1)CC, Molecular C7H8O2Journal, Article, Research Support, Non-U.S. Gov’t, Journal of the American Chemical Society called CpRu(PN) Complex-Catalyzed Isomerization of Allylic Alcohols and Its Application to the Asymmetric Synthesis of Muscone, Author is Ito, Masato; Kitahara, Sachiko; Ikariya, Takao, the main research direction is allylic alc isomerization stereoselective ruthenium catalyzed.Recommanded Product: 1-(Furan-2-yl)propan-1-one.

Highly efficient isomerization of allylic alcs. into saturated carbonyls is accomplished using the catalyst system of Cp*RuCl[Ph2P(CH2)2NH2-κ2-P,N]-KOt-Bu (Cp* = η5-C5(CH3)5) under mild conditions. Mechanistic consideration based on isotope-labeling experiments indicated the present reaction is applicable to the asym. isomerization of racemic sec-allylic alcs. with a prochiral olefin via dynamic kinetic resolution A concise asym. synthesis of muscone has been achieved, where the asym. isomerization using an optically active ligand is a key reaction.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Category: benzoxazole. 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. Compound: 1-(Furan-2-yl)propan-1-one, is researched, Molecular C7H8O2, CAS is 3194-15-8, about Comparison of determination method for volatile compounds in Thai soy sauce.

Dynamic headspace (DHS) sampling, direct solvent extraction (DSE) and vacuum simultaneous steam distillation-solvent extraction (V-SDE) were used for sample preparation in volatile compound anal. in Thai soy sauce. The extracts obtained from 2 brands were then analyzed by gas chromatog.-mass spectrometry (GC-MS). A comparative study of volatile compounds obtained from these preparation techniques was performed. Some similarities were observed among different characteristic volatile profiles obtained from each preparation technique. Highly volatile compounds were detected only by DHS whereas DSE and V-SDE gave a wide spectrum of chem. classes of compounds detected. Moreover, differences of volatile compounds detected from both soy sauces were noted. This might be due to the differences of production process employed and strains of microorganism used.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem