Category: 91-16-7

Al-Dalali, Sam published the artcileTracking volatile flavor changes during two years of aging of Chinese vinegar by HS-SPME-GC-MS and GC-O, Safety of 1,2-Dimethoxybenzene, the publication is Journal of Food Composition and Analysis (2022), 104295, database is CAplus.

Aging is an essential step for enriching the aroma profiles of Chinese vinegar. This study aimed to track the volatile flavor changes in the same batch of Chinese vinegar for the first time during two years of aging with the aid of HS-SPME-GC-MS. The aroma-active compounds were characterized at 0, 6, and 12 mo of aging using GC-O coupled with a modified frequency method. A total of 67 volatile compounds and 30 aroma-active compounds were identified during the different stages of aging. Most alcs., esters, ketones, acids, and phenols decreased during the aging from 628.4, 105.4, 132.1, 22.1, and 21.4μg/L at 0 mo to 228.7, 7.2, 9.69, 17.24, and 11.6μg/L at 24 mo sep., except aldehydes and pyrazines, which showed slight increases. Many aroma-active compounds were generated during the aging, such as methional, trimethylpyrazine, acetophenone, and 2-acetyl-3-ethylpyrazine, while pyrazines were formed during 24 mo of aging. Three aroma-active compounds with high odor activity values (OAVs) showed significant contributions to the aroma profile of vinegar, which included isovaleric acid (2743, 340, and 3139), 4-ethylguaiacol (580, 429, and 516), and γ-nonalactone (324, 640, and 442) at 0, 6, and 12 mo of aging, resp.

Journal of Food Composition and Analysis published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C8H10O2, Safety of 1,2-Dimethoxybenzene.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Liu, Panpan published the artcileDynamic changes in the aroma profile of Qingzhuan tea during its manufacture, Formula: C8H10O2, the publication is Food Chemistry (2022), 131847, database is CAplus and MEDLINE.

Changes in key odorants and aroma profiles of Qingzhuan tea (QZT) during its manufacture were determined using headspace solid-phase microextraction gas chromatog.-mass spectrometry/olfactometry. An aroma profile was constructed to illustrate sensory changes during manufacture The characteristic aroma of QZT was aged fragrance, which was mostly developed during pile fermentation and was enhanced during the aging and drying stages. Using volatile compounds found in the raw materials, sun-dried green tea and QZT finished product were compared by orthogonal partial least square-discriminant anal. Among 108 detected volatiles, 19 were significantly upregulated and 15 were downregulated. (E)-β-Ionone, (E,Z)-2,6-nonadienal, 1-octen-3-one, (E,E)-2,4-heptadienal, (E,E)-2,4-nonadienal, safranal, (E)-2-nonenal, α-ionone, and 1,2,3-trimethoxybenzene were found to be significant contributors to the aged QZT fragrance, reflecting their high odor-activity values and aroma intensities. Finally, the metabolic transformation of key aroma-active compounds was systematically analyzed. This study provided a theor. basis for improving the processing and quality of QZT.

Food Chemistry published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C8H10O2, Formula: C8H10O2.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Sabat, Nazarii published the artcileUnbiased C3-Electrophilic Indoles: Triflic Acid Mediated C3-Regioselective Hydroarylation of N-H Indoles, Product Details of C8H10O2, the publication is Angewandte Chemie, International Edition (2022), 61(30), e202204400, database is CAplus and MEDLINE.

The direct dearomative addition of arenes to the C3 position of unprotected indoles is reported under operationally simple conditions, using triflic acid at room temperature The present regioselective hydroarylation is a straightforward manner to generate an electrophilic indole at the C3 position from unbiased indoles in sharp contrast to previous strategies. This atom-economical method delivers biol. relevant 3-arylindolines and 3,3-spiroindolines in high yields and regioselectivities from both intra- and intermol. processes. DFT computations suggest the stabilization of cationic or dicationic intermediates with H-bonded (TfOH)n clusters.

Angewandte Chemie, International Edition published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C8H10O2, Product Details of C8H10O2.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Mi, Si published the artcileGeographical discrimination and authentication of Chinese garlic based on multi-element, volatile and metabolomics profiling combined with chemometrics, Application In Synthesis of 91-16-7, the publication is Food Control (2021), 108328, database is CAplus.

This study aims to discriminate the garlics collected from four different geog. locations of China. The multi-element (12 samples), volatile (12 samples) and metabolome (24 samples) composition of the garlics were analyzed and compared. A total of 34 chem. elements, 68 volatiles and 854 metabolites were detected in the garlic samples. Significant differences were observed in the chem. element, volatile and metabolomics profiles of the four groups of garlic. Multivariate statistics indicate that 10 chem. elements, 6 volatiles and 225 metabolites could be used as candidate markers for the separation of garlics obtained from Langfang, Jining, Kaifeng and Dali of China. The current work provides a chem. fingerprint of the selected Chinese garlics. Our results demonstrate that chem. profiling in combination with chemometrics has the potential to be used as feasible approaches for the authentication of the geog. origin of garlic.

Food Control published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C8H10O2, Application In Synthesis of 91-16-7.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

You, Hongyun published the artcileHydrogenation of Lignin-derived Phenolic Compounds over Ru/C Enhanced by Al₂O₃ Catalyst at Room Temperature, Recommanded Product: 1,2-Dimethoxybenzene, the publication is ChemistrySelect (2022), 7(19), e202200709, database is CAplus.

In this study, an efficient hydrogenation of phenols using Ru/C enhanced Al₂O₃ as catalyst at room temp to obtain cyclohexanols R-OH [R = 2-MeC₆H₁₁, 3-MeC₆H₁₁, 2-MeOC₆H₁₁, etc.] with selectivity close to 100% was reported. The addition of Al₂O₃ could made a significant difference on the phenol adsorption by the introduction of abundant Lewis acid site, which enabled activate aromatic rings by changing the electrophilic substitution reaction of aromatic groups and triggered the occurrence of phenol hydrogenation under the catalysis of Ru/C. The Lewis acid site and metal site cooperated with each other and promoted the conversion of phenols to cyclohexanols as the final products. Moreover, a variety of other phenolic or aromatic compounds were also tested. The steric effects derived from the different substituted groups on aromatic rings had a significant influence on the hydrogenation performances.

ChemistrySelect published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C8H5F3O3, Recommanded Product: 1,2-Dimethoxybenzene.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Zheng, Xuexue published the artcileCharacterization of key aroma compounds and relationship between aroma compounds and sensory attributes in different aroma types of Fu brick tea, Formula: C8H10O2, the publication is Food Chemistry: X (2022), 100248, database is CAplus and MEDLINE.

Aroma is one of the most important sensory properties of tea. Floral-fungal aroma type, ripe-fungal aroma type and fresh-fungal aroma type were the main aroma types of Fu brick tea by QDA. A total of 112 volatile compounds were identified and quantified in tea samples by HS-SPME/GC-MS anal. Ten voaltiles in floral-fungal aroma type, eleven voaltiles in ripe-fungal aroma type, and eighteen voaltiles in fresh-fungal aroma type were identified as key aroma compounds for the aroma characteristics formation in three aroma types of Fu brick tea. In addition, PLS anal. revealed that 3,4-dehydro-β-ionone, dihydro-β-ionone, (+)-carotol and linalool oxide II were the key contributors to the ′floral and fruity′ attribute, α-terpineol contributed to woody and stale attributes, and thirteen aroma compounds related to green attribute. Taken together, these findings will provide new insights into the formation mechanism of different aroma characteristics in Fu brick tea.

Food Chemistry: X published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C7H16ClNO2, Formula: C8H10O2.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Li, Yonglong published the artcileTunable Photocatalytic Two-Electron Shuttle between Paired Redox Sites on Halide Perovskite Nanocrystals, Category: ethers-buliding-blocks, the publication is ACS Catalysis (2022), 12(10), 5903-5910, database is CAplus.

Perovskite semiconductors as advanced solar energy-converting materials are promising catalysts for photoredox organic synthesis. Despite the high concentration of charge carriers generated on the perovskite surface, efficient utilization of these nonequilibrium and shambolic energetic carriers to trigger a chem. reaction remains a hot and challenging subject. Here, we report a photon-mediated electron shuttle between paired redox sites on perovskite nanocrystals for the reformation of highly stable carbon-halogen bonds, where both surface electrons and holes are utilized simultaneously. The photo-redox cascade can be effortlessly tailored by precise control of the surface-reducing/-oxidizing reaction rates, which unlocks the transformation for a wide range of (het)arenes. This work demonstrates colloidal perovskite photocatalysts for the direct installation of more than 10 different synthetically important functional groups onto arenes and heteroarenes.

ACS Catalysis published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C8H10O2, Category: ethers-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Xu, Yanlin published the artcileThe role of Nb₂O₅ in controlling metal-acid sites of CoMoS/γ-Al₂O₃ catalyst for the enhanced hydrodeoxygenation of guaiacol into hydrocarbons, COA of Formula: C8H10O2, the publication is Journal of Catalysis (2022), 19-28, database is CAplus.

Transformation of lignin-derived feedstocks into valuable hydrocarbons is of significant importance but still challenging. Herein, we report a novel and highly efficient bifunctional metal/acid CoMoS/γ-Al₂O₃ catalyst with doping of Nb₂O₅ for the hydrodeoxygenation of guaiacol. The dopant Nb₂O₅ significantly improves the HDO activity of CoMoS/γ-Al₂O₃ catalyst from 72.4% to 97.5% at 340°C. Extensive characterizations confirm that the modification of Nb₂O₅ weakens the metal-support interaction, and thus improves the sulfidation degree of Mo species and the dispersion of MoS₂ phases, leading to more MoS₂ edges. Accordingly, the induced formation of more Bronsted acid sites originating from -SH on increased MoS₂ edges greatly promotes the C_(sp2)-O scissions of phenolics, and therefore enhances the yield of hydrocarbons especially benzene. This work focuses on the mechanistic insights into the effect of Nb₂O₅ on sulfided Mo-based catalyst in the HDO of lignin compound and provides a promising approach for facilitation of lignin valorization with extensive applications.

Journal of Catalysis published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C5H6N2O2, COA of Formula: C8H10O2.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Wang, Zhen published the artcileCharacterization of the key odorants and their content variation in Niulanshan Baijiu with different storage years using flavor sensory omics analysis, Safety of 1,2-Dimethoxybenzene, the publication is Food Chemistry (2022), 131851, database is CAplus and MEDLINE.

Niulanshan Baijiu (NLS) is a light-flavor Baijiu (LFB) with a long history. The aroma-active compounds in six NLSs with different storage years were analyzed using gas chromatog.-olfactometry-mass spectrometry (GC-O-MS), coupled with Osme and aroma extraction dilution anal. (AEDA). A total of 59 odorants were identified, 5 odorants of them were, for the first time, identified as aroma-active compounds of LFB. After quantifying and calculating their odorant activity values (OAVs), 34 compounds had OAVs > 1, and the recombination and omission experiments further confirmed that Et acetate, Et acrylate, Et 2-methylbutyrate, γ-nonalactone, Et isovalerate, Et butyrate, isoamyl acetate, Et caprylate, Et valerate, 3-methylbutanal, β-damascenone, and geosmin have important contributions to the aroma of NLS. One-way ANOVA anal. further found that the contents of key odorants in NLS stored for four to five years were relatively stable. This study provides an important reference for product quality control in NLS.

Food Chemistry published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C12H6NNaO4, Safety of 1,2-Dimethoxybenzene.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem

Yang, Pan published the artcileSuper-2D metal organic frameworks with vertical layer skeletons and good adsorption performances, Computed Properties of 91-16-7, the publication is New Journal of Chemistry (2022), 46(20), 9515-9518, database is CAplus.

The accessibility of the components within metal organic frameworks (MOFs) to external guests for their interactions is very important for their performance. The MOFs suffer from compact AA stacks for 2-dimensional MOFs or interpenetrations for 3-dimensional MOFs, which reduce the guest accessibility. The authors designed super-2D MOFs to simultaneously avoid the compact AA stacks and interpenetrations. The obtained super-2D MOFs with vertical layer skeletons and ABC stacking mode exhibited high crystallinity, hierarchical pores, large surface areas and good adsorption performances.

New Journal of Chemistry published new progress about 91-16-7. 91-16-7 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether,Inhibitor,Inhibitor,Inhibitor, name is 1,2-Dimethoxybenzene, and the molecular formula is C65H82N2O18S2, Computed Properties of 91-16-7.

Referemce:
https://en.wikipedia.org/wiki/Ether,
Ether | (C2H5)2O – PubChem