Hexanal, 2-methylpyrazine, 2,3-dimethylpyrazine, 2,5-dimethylpyrazine, 2-methyl-2-thiazoline, 2-pentylfuran, 2-ethyl-3,5-dimethylpyrazine, 3-hydroxy-2-methyl-4H-pyran-4-one, 2-methylphenol, 2-acetyl-2-thiazoline, (E,E)-2,4-decadienal, 2-methoxy-4-vinylphenol, 4-hydroxy-3-methoxybenzaldehyde, 4-heptanone, 2-methyl-3-heptanone, trisodium phosphate, calcium carbonate, anhydrous sodium sulfate, corn starch and sodium chloride were purchased from Sigma-Aldrich (St. Louis, MO, USA). Methanol and methylene chloride, in GC-Resolv® grade, were purchased from Fischer Scientific (Pittsburgh, PA, USA). Maizewise™ whole grain and Innovasure™ refined maize flours were purchased from Cargill (Minneapolis, MN, USA). All the sensory reference materials, dry uncooked Bob′s Red Mill Steel Cut Oats, Bergen Unsalted Lightly Roasted Almonds, Organic Valley Whole UHT Milk, Toasted Wonder Bread™, Nilla® Wafers, and Old Dutch Restaurante® Style Yellow Corn Tortillas Chips, were purchased from a local grocery store.
2 methoxy 4 vinylphenol
Manufactured by Merck Group
Sourced in United States, Germany
2-methoxy-4-vinylphenol is a chemical compound used as a laboratory reagent. It is a white crystalline solid with a phenol-like odor. The compound is used in various chemical synthesis and analysis processes in research and development settings.
Automatically generated - may contain errors
Lab products found in correlation
4 ethylguaiacol, by Merck Group (3 mentions)
4 vinylphenol, by Merck Group (3 mentions)
Phenylacetaldehyde, by Merck Group (3 mentions)
2 methoxy 4 methylphenol, by Merck Group (3 mentions)
3 methylbutanoic acid, by Merck Group (3 mentions)
Acetic acid, by Merck Group (3 mentions)
3 methylbutanal, by Merck Group (3 mentions)
Butanoic acid, by Merck Group (3 mentions)
E e 2 4 decadienal, by Merck Group (2 mentions)
2 methylpyrazine, by Merck Group (2 mentions)
2 5 dimethylpyrazine, by Merck Group (2 mentions)
Eugenol, by Merck Group (2 mentions)
2 6 dimethoxyphenol, by Merck Group (2 mentions)
Gallic acid, by Merck Group (2 mentions)
Catechin, by Merck Group (2 mentions)
Vanillin, by Merck Group (2 mentions)
Methional, by Merck Group (2 mentions)
4 hydroxy 2 5 dimethyl 3 2h furanone, by Merck Group (2 mentions)
Acetaldehyde, by Merck Group (2 mentions)
Dimethyl sulfide, by Merck Group (2 mentions)
8 protocols using 2 methoxy 4 vinylphenol
1
Characterization of Maize Flour Flavor Compounds
2
Profiling Volatile Compounds in Green Coffee
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Green coffee beans (Coffea arabica, from Brazil) were bought from a commercial market in Seoul, Korea. The origin of green coffee beans was verified by the importers and experts. 2-Methylpyrazine, 2,5-dimethylpyrazine, 2,6-dimethylpyrazine, 2-ethyl-3-methylpyrazine, 2-ethyl-5-methylpyrazine, 3-ethyl-2,5-dimethylpyrazine, furfural, furfuryl acetate, furfuryl propionate, furfuryl alcohol, 1-furfurylpyrrole, 4-ethylguaiacol, 2-methoxy-4-vinylphenol, 5-methylfurfural, quinoxaline, and C7–C30 alkane standard were obtained from Sigma–Aldrich Chemical Co. (St. Louis, MO, USA). 2-Ethylpyrazine, 2,3-dimethylpyrazine, 1-methylpyrrole, guaiacol, and 2-acetylfuran were bought from Tokyo Chemical Industry Co., Ltd. (Tokyo, Japan). Divinylbenzene/carboxen/polydimethylsiloxane (DVB/CAR/PDMS, 50-μm film thickness) solid-phase microextraction (SPME) fiber was purchased from Supelco, Inc. (Bellefonte, PA, USA).
3
Quantification of Phenolic Compounds
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Ethyl gallate, 4-hydroxybenzaldehyde, vanillin, tyrosol, protocatechuic aldehyde, syringaldehyde, pyrogallol, 4-hydroxy-3-methoxycinnamaldehyde, 4-methylcatechol, tryptophol, ethyl 3,4-dihydroxycinnamate, 2,6-dimethoxyphenol, ethyl vanillate, homovanillyl alcohol, eugenol, 4-hydroxy-3-methoxyphenylacetone, salicylaldehyde, coniferyl alcohol, epicatechin, catechin, scopoletin, p-coumaric acid, caffeic acid, resveratrol, syringic acid, rutin, gallic acid, salicylic acid, protocatechuic acid, 2-methoxy-4-vinylphenol, 4-vinylphenol, 4-ethylguaiacol were purchased from Sigma-Aldrich (Steinheim, Germany). All chemicals were used in the highest purity available. Acetonitrile and methanol (gradient grade for liquid chromatography) were also purchased from Sigma-Aldrich. Deionized water was produced by Mili-Q® Reference System (Merck KGaA, Darmstadt, Germany). Sodium chloride was purchased by Lach-Ner (Neratovice, Czech Republic). Standard solution of n-alkanes C8-C33 was purchased by CPAchem (Stara Zagora, Bulgaria). Technical gases, i.e., helium 4.6, hydrogen, and nitrogen, were purchased from Linde Gas (Prague, Czech Republic).
4
Compound Acquisition for Flavor Analysis
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The pure samples of the following compounds: nonanal, 2,3-butanedione (diacetyl), acetic acid, 3-methylbutanal, butanoic acid, 2-methylpropanoic acid, 3-methylbutanoic acid, pentanoic acid, octanoic acid, and hexanoic acid were purchased from Merck (Darmstadt, Germany). (E)-2-nonenal, 2-nonanone, phenyl acetaldehyde, δ-decalactone, 2-methoxy-4-vinylphenol, 4,5-epoxy-(E)-2-decanal, (E,E)-2,4-decadienal, (Z)-2-nonenal, methional, and 4-hydroxy-2,5-dimethyl-3 (2H)-furanone were from Sigma–Aldrich (Taufkirchen, Germany). 1-Octen-3-one was from Symrise (Holzminden, Germany). The following labelled compounds were synthesized according to the literature cited; [2H2]-butanoic acid [19 (link)]; 3-[2H2]-methylbutanal [11 (link)]; [2H2-5]-2-acetyl-1-pyrroline [20 (link)]; [13C4]-2,3-butanedione [21 (link)]; [2H]-(E,E)-2,4-decadienal [22 ]; [13C2]-acetic acid [22 ]; [2H2]-3-methylbutanoic acid [23 (link)]; [2H3]-2-methoxyphenol [24 (link)]; [2H5]-phenyl acetaldehyde [25 (link)]; [13C2]-4-hydroxy-2,5-dimethyl-3(2H)-furanone [26 (link)]; [2H2]-δ-decalactone [27 (link)]; [2H2]-methional [27 (link)]. Lastly, [2H3]-hexanoic acid was from Cambridge Isotope Laboratories (Euriso-top GmbH, Saarbrucken, Germany).
5
Flavor Compound Procurement for Analysis
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Diethyl ether, dansyl chloride, and saturated
alkane standards were purchased from Sigma-Aldrich (Gillingham, Dorset,
UK). O-(2,3,4,5,6-Pentafluorobenzyl)-hydroxylamine
hydrochloride (PFBHA) was purchased from Fluka (Loughborough, UK).
The following food-grade aroma compounds were purchased from Sigma-Aldrich
(purity in parenthesis): acetaldehyde (≥99%), acetic acid (≥99.5%),
2,3-butanedione (97%), butanoic acid (≥99%), (E)-β-damascenone (≥98%), dimethyl sulfide (≥99%),
5-ethyl-3-hydroxy-4-methyl-2(5H)-furanone (97%),
5(or 2)-ethyl-4-hydroxy-2(or 5)-methyl-3(2H)-furanone
(96%), (Z)-4-heptenal (≥98%), 3-hydroxy-4,5-dimethyl-2(5H)-furanone (10% in propylene glycol), 4-hydroxy-2,5-dimethyl-3(2H)-furanone (≥98%), methional (≥97%), 2-methoxy-4-methylphenol
(≥98%), 2-methoxyphenol (≥99%), 2-methoxy-4-vinylphenol
(≥98%), 2-methylbutanal (≥95%), 3-methylbutanal (≥97%),
3-methylbutanoic acid (99%), 3-methyl-1-butanol (≥98%), methylpropanal
(≥98%), 2,3-pentanedione (≥96%), phenylacetaldehyde
(10% in ethanol), 2-phenylacetic acid (≥99%), 2-phenylethanol
(≥99%), vanillin (≥97%), and 4-vinylphenol (10% in propylene
glycol). Encapsulated 3-methyl-2-butene-1-thiol flavor standard (0.02–4
ng/g) was purchased from FlavorActiV (Aston Rowant, UK).
alkane standards were purchased from Sigma-Aldrich (Gillingham, Dorset,
UK). O-(2,3,4,5,6-Pentafluorobenzyl)-hydroxylamine
hydrochloride (PFBHA) was purchased from Fluka (Loughborough, UK).
The following food-grade aroma compounds were purchased from Sigma-Aldrich
(purity in parenthesis): acetaldehyde (≥99%), acetic acid (≥99.5%),
2,3-butanedione (97%), butanoic acid (≥99%), (E)-β-damascenone (≥98%), dimethyl sulfide (≥99%),
5-ethyl-3-hydroxy-4-methyl-2(5H)-furanone (97%),
5(or 2)-ethyl-4-hydroxy-2(or 5)-methyl-3(2H)-furanone
(96%), (Z)-4-heptenal (≥98%), 3-hydroxy-4,5-dimethyl-2(5H)-furanone (10% in propylene glycol), 4-hydroxy-2,5-dimethyl-3(2H)-furanone (≥98%), methional (≥97%), 2-methoxy-4-methylphenol
(≥98%), 2-methoxyphenol (≥99%), 2-methoxy-4-vinylphenol
(≥98%), 2-methylbutanal (≥95%), 3-methylbutanal (≥97%),
3-methylbutanoic acid (99%), 3-methyl-1-butanol (≥98%), methylpropanal
(≥98%), 2,3-pentanedione (≥96%), phenylacetaldehyde
(10% in ethanol), 2-phenylacetic acid (≥99%), 2-phenylethanol
(≥99%), vanillin (≥97%), and 4-vinylphenol (10% in propylene
glycol). Encapsulated 3-methyl-2-butene-1-thiol flavor standard (0.02–4
ng/g) was purchased from FlavorActiV (Aston Rowant, UK).
6
Comprehensive Analysis of Turmeric Bioactive Compounds
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Dried turmeric (moisture content 15.7 ± 0.1%, crude fat 6.4 ± 0.1, crude protein 7.7 ± 0.1, ash 6.5 ± 0.4) was kindly donated from Bibong Herb (Yangju-si, Korea) and kept in a deep freezer before use. Fermented ethanol, an extraction solvent, was provided by ethanol Supplies World Co. (Jeonju-si, Korea). Methyl alcohol, sodium carbonate, sodium hydroxide, and hydrochloric acid were purchased from Daejung Chemicals & Metals Co. (Siheung-si, Korea). Folin-Ciocalteu’s phenol reagent, 2,2′-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) diammonium salt (ABTS), 2,2′-azobis (2-amidino-propane) dihydrochloride (AAPH), 1,1-diphenyl-2-picrylhydrazyl (DPPH), gallic acid, catechin, ascorbic acid, HPLC analytical standard curcumin, demethoxycurcumin, bis-demethoxycurcumin, ferulic acid, and 2-Methoxy-4-vinylphenol were purchased from Sigma-Aldrich Co. (St. Louis, MO, USA). Aluminum chloride and sodium nitrite were purchased from Junsei Chemical Co., LTD (Tokyo, Japan). HPLC grade water, acetonitrile, and methanol were purchased from Honeywell Burdick & Jackson Inc. (Charlotte, NC, USA).
7
Catalytic Hydrogenation of Phenolic Compounds
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2‐Methoxy‐4‐propylphenol (≥99 %), 4‐allyl‐2,6‐dimethoxyphenol (≥95 %), isoeugenol (98 %), eugenol (99 %), 4‐ethylguaiacol (≥98 %), 2‐methoxy‐4‐vinylphenol (≥98 %), 2‐methoxy‐4‐methylphenol (≥98 %), 2,6‐dimethoxyphenol (≥98 %), cyclohexanol (99 %), cyclohexanone (99.8 %), cyclohexylamine (99.9 %), 2‐methoxycyclohexanone (97 %), t‐amyl alcohol (99 %), and Raney Ni 2800 were purchased from Sigma‐Aldrich. Guaiacol (>98 %) and phenol (≥99.5 %) were purchased from TCI.
8
Aroma Compound Analysis Protocol
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The following aroma compounds were purchased from Sigma-Aldrich (purity in parenthesis): acetaldehyde (≥99 %), acetic acid (≥99.5 %), 2,3-butanedione (97 %), butanoic acid (≥99 %), dimethyl sulfide (≥99 %), 5(or 2)-ethyl-4-hydroxy-2(or 5)-methyl-3(2H)-furanone (homofuraneol, 96 %), Z-4-heptenal (≥98 %), 3-hydroxy-4,5-dimethyl-2(5H)-furanone (sotolone, 10 % in propylene glycol), 4-hydroxy-2,5-dimethyl-3(2H)-furanone (furaneol, ≥98 %), methional (≥97 %), 2'methoxyacetophenone (99 %), 2-methoxy-4-methylphenol (≥98 %), 2-methoxyphenol (≥99 %), 2methoxy-4-vinylphenol (≥98%), 2-methylbutanal (≥95 %), 3-methylbutanal (≥97 %), 3methylbutanoic acid (99 %), 3-methyl-1-butanol (≥98%), methylpropanal (≥98 %), 2methylthiophene (98 %), 2,3-pentanedione (≥96 %), phenylacetaldehyde (10 % in ethanol), 2phenylacetic acid (≥99 %), 2-phenylethanol (≥99 %), vanillin (≥97 %), 4-vinylphenol (10 % in propylene glycol). All were food grade except 2'-methoxyacetophenone and 2-methylthiophene.
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