Category: 3194-15-8

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 Pyrolysis of carbohydrates. Analysis of industrial caramel vapors, published in 1989-08-31, which mentions a compound: 3194-15-8, mainly applied to carbohydrate caramelization gas composition; glucose pyrolysis gas composition; sucrose pyrolysis gas composition, Safety of 1-(Furan-2-yl)propan-1-one.

Twenty nine compounds were identified by gas chromatog./mass spectrometry in the gaseous products from pyrolysis of glucose and sucrose under conditions of caramel manufacture The main product was 5-hydroxymethylfurfural (70-90%, depending on pyrolysis conditions). The compound was formed more easily from sucrose than from glucose, and its yield increased with increasing pyrolysis temperature Aliphatic and keto acids, heterocyclic compounds with furan or pyran ring, aromatic compounds, and bisfuran compounds were formed in minor amounts

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Reference:
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 《Furfuryl- and thenylalkylamines from Schiff bases》. Authors are Emling, Bertin L.; Beatty, J. E.; Stevens, J. R..The article about the compound:1-(Furan-2-yl)propan-1-onecas:3194-15-8,SMILESS:O=C(C1=CC=CO1)CC).COA of Formula: C7H8O2. Through the article, more information about this compound (cas:3194-15-8) is conveyed.

Furfural (96 g.), added dropwise to 88 g. BuNH2 at 15-20°, stirred 30 min. at room temperature, saturated with solid NaOH, and extracted with ether, gives 90% N-furfurylidenebutylamine (I), b13 90°, n20D 1.5057, d204 0.950 (all n and d. at 20°); the following homologs were prepared similarly: Me b16 53°, n 1.5269, d. 1.025, 85%; Et b18 67°, n 1.5170, d. 0.988, 86%; Pr b21 87-8°, n 1.5105, d. 0.967; Am b10 104-5°, n 1.5024, d. 0.940. N-Thenylidenebutylamine b13 112-13°, n25D 1.5459, d254 0.990. I (68 g.) in 70 ml. ether, added to EtMgBr (54.5 g. EtBr) and refluxed 2 hrs., gives 60% N-butyl-α-ethylfurfurylamine (II), b25 108-9°, n 1.4635, d. 0.907 (1-naphthylurea m. 76-7°); N-amyl-α-methylfurfurylamine b15 102-3°, n 1.4681, d. 0.913, 36% (1-naphthylurea m. 76-7°); N-propyl-α-propylfurfurylamine b24 107-8°, n 1.4634, d. 0.904, 47% (1-naphthylurea m. 87°); N-ethyl-α-butylfurfurylamine b23 105.5-6.5°, n 1.4636, d. 0.909, 47% (1-naphthylurea m. 119-19.5°); N-methyl-α-amyl-furfurylamine b3 75-6°, n 1.4649, d. 0.913, 52% (1-naphthylurea m. 121°); α-isoamyl isomer b4 67.5-8.5°, n 1.4644, d. 0.913, 55% (1-naphthylurea m. 149°). N-Butyl-α-ethylthenylamine b3 84°, n25D 1.5172, d254 0.961, 60%. Furan and (EtCO)2O with ZnCl2 give 52% furyl Et ketone; 32 g. of the oxime (68%) on reduction with Na in EtOH gives 10 g. α-ethylfurfurylamine, which with BuI in com. xylene (refluxed 4 hrs.) gives II.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Formula: C7H8O2. 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 New Components with Potential Antioxidant and Organoleptic Properties, Detected for the First Time in Liquid Smoke Flavoring Preparations. Author is Guillen, Maria D.; Ibargoitia, Maria L..

A com. aqueous smoke preparation was exhaustively extracted, using dichloromethane as solvent, until the carrier had totally lost its smoky odor. Qual. and quant. characterizations of the extract were performed by means of gas chromatog./mass spectrometry and gas chromatog. with flame ionization detector, resp. Carbonyl derivatives including aldehydes and ketones as well as acids and esters are almost absent; however, the high proportion of phenol, guaiacol, and syringol derivatives is noticeable. The presence of di-tert-butylhydroxytoluene, several hopanes, and a number of lignin dimers must be pointed out; these latter components had apparently not been detected before either in smoke flavorings or in wood smoke. The mass spectral data of the compounds considered as lignin dimers and of the unidentified components are given. The presence of lignin dimers is very interesting from the point of view of health and food technol. for their therapeutic, organoleptic, and antioxidant properties.

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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. V. Preparation and configuration of furyl ketoximes, published in 1958, which mentions a compound: 3194-15-8, mainly applied to , Name: 1-(Furan-2-yl)propan-1-one.

cf. C.A. 45, 5676i. Several pairs of syn- and anti-furyl ketoximes were prepared, characterized, and their configuration established chem. and by UV absorption spectra determinations NaOH (100 g.) in 110 mL. H2O stirred with cooling with 86.9 g. HONH2.HCl in 220 mL. H2O and the mixture stirred 3 h. at 25-30° with 110 g. 2-furyl Me ketone, 2-RC4H3O (I) (R = Ac), the solution treated with 200 mL. saturated NH4Cl solution and the product washed with H2O yielded 80% anti-2-furyl Me ketoxime, anti-2-RC4H3O (II) (R = MeC:NOH) (IIa), m. 104°; HCl salt, m. 85-90°. IIa (10 g.) in 250 mL. Et2O at 0° saturated with dry HCl until the initial precipitate redissolved and the solution kept overnight, evaporated in vacuo and the residue washed with 2N Na2CO3, filtered and the precipitate recrystallized (H2O) gave 6.5 g. syn-IIa, m. 74°; HCl salt, m. 128-9°. Syn-IIa (1 g.) in 10 mL. 2N H2SO4 at 80° kept overnight at room temperature, neutralized with 2N Na2CO3, and the product crystallized (alc.) gave 0.6 g. anti-IIa. Furan (102 g.) and 390.4 g. (EtCO)2O at 40° treated in 5 min. with 15 mL. 85% H3PO4 and the mixture stirred 1 h. at 60-5°, the cooled mixture neutralized with 600 mL. 50% KOH and extracted repeatedly with Et2O, the extract dried (Na2SO4) and evaporated yielded 72% I (R = EtCO) (Ia), b11 74-5°. NaOH (50 g.) in 150 mL. H2O stirred with cooling with 43.5 g. HONH2.HCl in 150 mL. H2O and the mixture treated dropwise with 62.1 g. Ia at 25-30°, the mixture stirred 3 h. and the solution treated with 120 mL. saturated NH4Cl solution, the solidified product filtered off and taken up in 180 mL. alc., the filtered solution chilled, and diluted with 400 mL. H2O gave 35 g. pure anti-II (R = EtC:NOH) (IIb), m. 73°. Working up the mother liquor yielded 23 g. impure anti-IIb, m. 48-50°. Conversion of anti-IIb through the HCl salt in Et2O and crystallization of the crude product (dilute alc.) yielded 83% authentic syn-IIb, m. 77-8°. HONH2.HCl (46 g.), 56.2 g. anhydrous NaOAc, and 94.6 g. I (R = Bz) refluxed 1 h. in 550 mL. absolute alc. and the solution filtered hot, the residue washed with 140 mL. absolute alc. and the filtrate and washings kept 2 days, filtered, and the product recrystallized (EtOAc) yielded 23% anti-II (R = PhC:NOH) (IIc), m. 161°. Concentration of the mother liquor and treatment of the isomeric mixture (72 g., m. 132-5°) with HCl in Et2O yielded 96% syn-IIc, m. 149° (dilute alc.). Ac2O (510 g.) and 205.3 g. α-methylfuran treated as above with 25 g. 85% H3PO4 yielded 38% 5-methyl-2-furyl Me ketone (III), b12 78-80°. III (115 g.) in 650 mL. alc. and 77.6 g. HONH2.HCl in 240 mL. H2O containing 95.4 g. anhydrous NaOAc kept 16 h. and evaporated in vacuo with passage of 400-50 mL. alc., the concentrate diluted with 1 l. H2O and the solution chilled, 1 h. filtered, and the crystalline product (117 g.) recrystallized (400 mL. C6H6 and 100 mL. C6H6) gave 66 g. pure anti-5-methyl-2-furyl Me ketoxime (anti-IV), m. 83°. Concentration of the 2 mother liquors and treatment with HCl in Et2O yielded 88% syn-IV, m. 109°. HONH2.HCl (69.5 g.) in 120 mL. H2O and 100 g. NaOH in 120 mL. H2O added to a hot solution of 111 g. 2-benzofuryl Ph ketone (V) (cf. Stoermer, et al., C.A. 18, 2160) in 2 l. MeOH and the mixture boiled 20 min., concentrated and the residue treated with 750 mL. H2O and 250 mL. saturated NH4Cl solution, the precipitate taken up in a min. of alc., and the filtered solution diluted with H2O gave 111 g. isomeric mixture of anti- and syn-2-benzofuryl Ph ketoxime (anti-VI and syn-VI) (VII). VII (53.4 g.) shaken with 267 mL. Ac2O and the solution kept 1 day, filtered from 10.6 g. anti-VI acetate (VIa), m. 146°, and the filtrate diluted with 2 volumes ice H2O, neutralized with solid Na2CO3, and the solid product (50 g.) recrystallized (alc. and EtOAc) gave 18.9 g. VIa. VIa (20 g.) heated in 200 mL. 2N NaOH and the cooled solution diluted with 200 mL. H2O, stirred with 85 mL. saturated NH4Cl solution and filtered, the precipitate washed with H2O and dried in vacuo, taken up in a min. of warm PhMe and the filtered solution treated with petr. ether, the crude oxime (11.7 g., m. 140-53°) taken up in hot alc., and the solution diluted with H2O gave 10 g. anti-VI, m. 156°. Rearrangement of VII or pure anti-VI with HCl in Et2O gave syn-VI, m. 145° (dilute MeOH). anti-2-Benzofuryl Me ketoxime (anti-VIII), m. 154-5° (cf. C.A. 44, 2973d), rearranged yielded 84% syn-VIII, m. 161°. The oximes shaken with 10 volumes Ac2O and the solutions kept 3 h., poured into ice H2O, and neutralized with Na2CO3 gave the acetates. The oximes (0.01 mol) in 10 mL. C5H5N acetylated with equivalent amounts of BzCl or p-MeC6H4SO2Cl at -5 to -10°, kept 1 h. at 0° and poured into ice H2O, filtered, and the precipitate washed with H2O and dried over H2SO4 and KOH gave the benzoates and tolylsulfonates [oxime, and m.p. (solvent of crystallization) of acetate, benzoate, and tolylsulfonate given]: syn-IIa, 75° (H2O), 84° (petr. ether), 88° (C6H6-petr. ether); anti-IIb, 94° (petr. ether), 93° (petr. ether), 68°; anti-IIc, 109-10° (petr. ether), 144° (EtOAc), 84° (Me2CO-H2O); syn-IIc, 68° (petr. ether), 99-100° (alc.), 118°; anti-IV, 66° (petr. ether), 86° (petr. ether), 72° (decomposition) (C6H6-petr. ether); syn-IV, 94° (petr. ether), 95° (petr. ether), 112°; anti-VIII, 95-6° (petr. ether), 135-6° (alc.), 100-2°; syn-VIII, 77° (petr. ether), 90° (petr. ether), 140° (Me2COH2O); anti-VI, 146°, 152° (alc.), 116-18° (C6H6-petr. ether); syn-VI, 81° (alc.), 120° (alc.), 112° (C6H6-petr. ether). Anti-VI (10.2 g.) in 20 mL. C5H5N treated gradually at -5 to -10° with 9 g. r-MeC6H4SO2Cl and the mixture kept 1 h. at 0°, poured into 150 mL. ice H2O and the oily product triturated with Me2CO, the trituration diluted with H2O and filtered, and the precipitate washed with 2N HCl and H2O gave 15.25 g. anti-VI p-toluenesulfonate, m. 116-18° (Me2CO-ice H2O and C6H6-petr. ether). The preparation of the pairs of ketoximes permitted for the 1st time a systematic comparative spectroscopic examination UV absorption spectra for furfural oxime (IX), IIa, IIb, and IV showed a single maximum at 270 mμ, IIc had 2 maximum, and the spectra of VI and VIII were complicated. The syn- and anti-isomers showed a small difference in wave length but a larger difference in intensity. Based on the established configuration of IX, the chem. assigned configurations were spectroscopically confirmed. The preferential formation of anti-isomers in alk. media and of isomeric mixtures in neutral or acid media and the mechanism of the rearrangement in ethereal HCl were discussed.

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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 Characterization of volatile compounds in three commercial Chinese vinegars by SPME-GC-MS and GC-O, published in 2019-09-30, which mentions a compound: 3194-15-8, mainly applied to vinegar volatile compound SPME GCMS GCO, Electric Literature of C7H8O2.

Headspace solid-phase microextraction (HS-SPME) coupled with gas chromatog.-mass spectrometry (GC-MS) and gas chromatog.-olfactometry (GC-O) were carried out to qual. and quant. characterize the volatiles and aroma-active compounds in three com. Chinese vinegars, including Zhengrong Rice Vinegar (ZRV), Zhenjiang Aromatic Vinegar (ZAV), and Longmen Smoked Vinegar (LSV). With the aid of DVB/CAR/PDMS fiber, a total of 75 volatile compounds were identified. Among them, 42 aromas were confirmed by their corresponding authentic chems. After comparison of the identified volatiles between the three vinegars, the ZAV sample was found to contain more alcs. and acids, the ZRV sample had more esters and phenols, while the LSV sample was shown to have more identified compounds in the ketones, aldehydes, and pyrazines. In regard to the quantitation, the volatiles that were found in high concentrations included acetic acid (at 14.64, 31.95 and 194 mg/L), furfural (at 5.49, 43.81 and 33.01 mg/L) and tetra-Me pyrazine (at 10.39, 13.51 and 19.41 mg/L) in ZRV, ZAV and LSV, resp. Moreover, thirty volatiles were identified by GC-O as aroma-active compounds that made contributions to the resp. flavor profiles of the com. Chinese vinegar. Eighteen of them were recognized as contributors for all the three com. Chinese vinegars under this study.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Safety of 1-(Furan-2-yl)propan-1-one. 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 Simple Catalytic Mechanism for the Direct Coupling of α-Carbonyls with Functionalized Amines: A One-Step Synthesis of Plavix. Author is Evans, Ryan W.; Zbieg, Jason R.; Zhu, Shaolin; Li, Wei; MacMillan, David W. C..

The direct α-amination of ketones, esters, and aldehydes has been accomplished via copper catalysis. In the presence of catalytic copper(II) bromide, a diverse range of carbonyl and amine substrates undergo fragment coupling to produce synthetically useful α-amino-substituted motifs. The transformation is proposed to proceed via a catalytically generated α-bromo carbonyl species; nucleophilic displacement of the bromide by the amine then delivers the α-amino carbonyl adduct while the catalyst is reconstituted. The practical value of this transformation is highlighted through one-step syntheses of two high-profile pharmaceutical agents, Plavix and amfepramone.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Synthetic Route of C7H8O2. 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 Headspace solid-phase microextraction-gas chromatographic-time-of-flight mass spectrometric methodology for geographical origin verification of coffee. Author is Risticevic, Sanja; Carasek, Eduardo; Pawliszyn, Janusz.

Increasing consumer awareness of food safety issues requires the development of highly sophisticated techniques for the authentication of food commodities. The food products targeted for falsification are either products of high com. value or those produced in large quantities. For this reason, the present investigation is directed towards the characterization of coffee samples according to the geog. origin. The conducted research involves the development of a rapid headspace solid-phase microextraction (HS-SPME)-gas chromatog.-time-of-flight mass spectrometry (GC-TOFMS) method that is utilized for the verification of geog. origin traceability of coffee samples. As opposed to the utilization of traditional univariate optimization methods, the current study employs the application of multivariate exptl. designs to the optimization of extraction-influencing parameters. Hence, the two-level full factorial first-order design aided in the identification of two influential variables: extraction time and sample temperature The optimum set of conditions for the two variables was 12 min and 55 °C, resp., as directed by utilization of Doehlert matrix and response surface methodol. The high-throughput automated SPME procedure was completed by implementing a single divinylbenzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS) 50/30 μm metal fiber with excellent durability properties ensuring the completion of overall sequence of coffee samples. The utilization of high-speed TOFMS instrument ensured the completion of one GC-MS run of a complex coffee sample in 7.9 min and the complete list of benefits provided by ChromaTOF software including fully automated background subtraction, baseline correction, peak find and mass spectral deconvolution algorithms was exploited during the data evaluation procedure. The combination of the retention index (RI) system using C8-C40 alkanes and the mass spectral library search was utilized for the confirmation of analyte identity in the reference authentic Brazilian coffee sample. The semi-quant. results were then submitted to statistical evaluation, namely principal component anal. (PCA) for the establishment of geog. origin discriminations.

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Reference:
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 《A novel cyclodehydration. Thermal conversion of diethyl 2-naphthyloxyoxalacetate to diethyl naphtho[2,1-b]furan-1,2-dicarboxylate》. Authors are Takemura, K. H..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.

Diethyl 2-naphthyloxyoxalacetate, when heated at 205° did not undergo the expected decarbonylation to give diethyl 2-naphthyloxymal-onate, but instead cyclized to yield diethyl naphtho[2,1-b]furan-1,2-dicarboxylate. The same cyclization was effected in AcOH-H2SO4 and with p-MeC6H4SO3H in toluene. Diethyl 2-naphthyl-oxymalonate was prepared from sodium 2-naphthoxide and diethyl chloromalonate. The reaction of sodium 2-naphthoxide with diethyl bromomalonate afforded diethyl 2-naphthyloxymalonate and diethyl bis(2-naphthyloxy)malonate, both in poor yields.

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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 the American Chemical Society called Super-aromatic properties of furan. II. The Friedel-Crafts reaction, Author is Gilman, Henry; Calloway, N. O., which mentions a compound: 3194-15-8, SMILESS is O=C(C1=CC=CO1)CC, Molecular C7H8O2, HPLC of Formula: 3194-15-8.

cf. C. A. 27, 502. 2-Furyl Ph ketone, tert-BuCl and AlCl3 give 30% of 5-tert-butyl-2-furyl Ph ketone, b20 180-2°, d2525 1.065, nD25 1.5665; this also results in 70% yield from 5-tert-butyl-2-furoyl chloride (b. 220°, d2525 1.108, nD25 1.5091), C6H6 and AlCl3. 2-Furfural and iso-PrCl with AlCl3 in CS2 give an aldehyde (dihydrofuran derivative), C8H12O2, b21 101-3°, d2525 1.023, nD25 1.5041 (semicarbazone, m. 174-6°); oxidation with alk. Ag2O gives an acid (dihydroisopropylfuroic acid or a ring-scission product), m. 76-7°; it is unchanged on heating with PCl5; the aldehyde, Ac2O and AcONa give 40% of a dihydroisopropyl-furylacrylic acid (?), m. 102-3°. The following alkyl 2-furyl ketones were prepared from furan and acid chloride with AlCl3 in CS2: Et, b17 78-80°, m. 27-8° (36.3% yield); Pr, b19 95-7°, d2525 1.041, nD25 1.4922 (51.8%); iso-Pr, b18 86-7°, d. 1.032, n 1.4888 (45.3%); Bu, b18 108-9°, d. 1.012, n 1.4900 (23%) (semicarbazone, m. 158-9°); Am, b16 116-9°, d. 0.9954, n 1.4864 (39%) (semicarbazone, m. 110-2°); the yields of ketones prepared from 2-furylmercuric chloride were: Et 24.2, Pr 18.1, iso-Pr 14.5, Am 18%. Alkylation of Me 2-furoate with AlCl3 in CS2 gave the following Me 5-alkyl-2-furoates: iso-Pr, b20 110-2°, d. 1.076, n 1.4851; tert-Bu, b15 110-4°, d. 1.037, n 1.4792; Am, b13 112-6°, d. 1.032, n 1.4804; hexyl, b19 132-6°, d. 1.016, n 1.4814; the corresponding acids m. 65-6°, 104-5°, 69-70° and 36-7°, resp. The reaction of MeCl gives a compound, m. 102-3°, which may be 5-carbomethoxy-2-carbodithiomethoxyfuran. Et furyl ketone and MeMgI give 66.3% of methylethyl-2-furylcarbinol, b19 77-8°, d. 1.023, n 1.4729; dehydration gives sec-butyl-2-furan, b. 132-5°. The following 2-alkylfurans were prepared by reduction of the ketone or decarboxylation of the acids: Pr, b. 114-6°, d. 0.882, n 1.4410 (36%); iso-Pr, b. 106-9°, d. 0.8771, n 1.4466 (55%); Bu, b. 137-8°, d. 0.8983, n 1.4460 (53.8%); iso-Bu, b. 123-7°, d. 0.886, n 1.4425 (32%); sec-Bu, b. 132-5°; tert-Bu, b. 119-20°, d. 0.8708, n 1.4380 (60%); the corresponding alkyl-2-furylmercuric chlorides m. 99°, 117-8°, 79-80°, 95-6, 88° and 136-7°, resp. AlCl3 appears to be ineffective in a Friedel-Crafts reaction of the ester with Ac2O or AcCl. Et furoate, Ac2O, SnCl4 and C6H6 give 30% of Et 5-acetyl-2-furoate, m. 85-6°, the corresponding keto acid decomposes on heating and with Cu bronze gives Me 2-furyl ketone. Me 5-butyryl-2-furoate m. 67-8°; the free acid m. 172°. 2,4-Dimethyl-3-furyl Ph ketone, b15 140°, d. 1.152, n 1.5602, results in 7% yield with AlCl3 and in 29% yield with SnCl4. Me anisate and iso-PrCl with AlCl3 in CS2 give 33.6% of Me 3-isopropyl-4-methoxybenzoate, b25 162-5°, d. 1.074, n 1.5236; the free acid m. 162-3°. Et isopropyl-α-naphthoate, b20 198-203°, d. 1.077, n 1.5760; the acid m. 68-72°. Et butyl-α-naphthoate, b18 230-5°, d. 1.0131, n 1.5552. The preferential and exclusive substitution in the furan nucleus of a sym. ketone like 2-furyl Ph ketone and the alkylation and acylation of Et furoate but not of BzOEt, together with the fact that C6H6 can be used as a medium for some Friedel-Crafts reactions of furan are advanced as addnl. supporting evidence for the concept that furan has super-aromatic properties.

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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 Volatile profile of Madeira wines submitted to traditional accelerated ageing.Related Products of 3194-15-8.

The evolution of monovarietal fortified Madeira wines forced-aged by traditional thermal processing (estufagem) were studied in terms of volatiles. SPE extracts were analyzed by GC-MS before and after heating at 45°C for 3 mo (standard) and at 70°C for 1 mo (overheating). One hundred and ninety volatile compounds were identified, 53 of which were only encountered in baked wines. Most chem. families increased after standard heating, especially furans and esters, up to 61 and 3-fold, resp. On the contrary, alcs., acetates and fatty acids decreased after heating. Varietal aromas, such as Malvasia’s monoterpenic alcs. were not detected after baking. The accelerated aging favored the development of some volatiles previously reported as typical aromas of finest Madeira wines, particularly phenylacetaldeyde, β-damascenone and 5-ethoxymethylfurfural. Addnl., Et butyrate, Et 2-methylbutyrate, Et caproate, Et isovalerate, guaiacol, 5-hydroxymethylfurfural and γ-decalactone were also found as potential contributors to the global aroma of baked wines.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem