Tag: M.W=100-150

Zhang, Kaiyue published the artcileVisible-light-induced selective oxidation of amines into imines over UiO-66-NH₂@Au@COF core-shell photocatalysts, HPLC of Formula: 6850-57-3, the publication is ACS Sustainable Chemistry & Engineering (2021), 9(37), 12623-12633, database is CAplus.

Efficient and stable photocatalysts for selective oxidative coupling of amines to imines are crucial to the conversion of sustainable solar energy to value-added chem. energy. In this work, UiO-66-NH₂@Au@COF core-shell nanocomposites with intercalated Au nanoparticles between the UiO-66-NH₂ core and the covalent-organic framework (COF) shell have been demonstrated to exhibit enhanced activity and stability for visible-light-driven aerobic selective oxidation of amines to imines. With optimized Au and two-dimensional π-conjugated COF content, the obtained UiO-66-NH₂@Au_0.5@COF1 photocatalyst exhibited the highest conversion of benzylamine with an imine yield of 66.9% for at least five cycles. It is revealed that the introduction of appropriate Au and COF could not only broaden the visible-light absorption band but also promote the separation of photoinduced charge carriers and enhance the photocatalytic performance. Furthermore, a rational mechanism was explored to elucidate the process of photocatalytic reaction. The intercalated Au nanoparticles with the localized surface plasmon resonance (LSPR) effect act as generators of hot electrons and also transfer channels for the photo-generated electrons from the COF shell to the UiO-66-NH₂ core. Importantly, the MOF@metal@COF photocatalysts might provide a promising strategy to construct photocatalysts with desirable activity and stability under visible-light illumination.

ACS Sustainable Chemistry & Engineering published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C7H15NO, HPLC of Formula: 6850-57-3.

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

Slavchev, Ivaylo published the artcileBase-promoted direct amidation of esters: beyond the current scope and practical applications, Category: ethers-buliding-blocks, the publication is RSC Advances (2022), 12(32), 20555-20562, database is CAplus and MEDLINE.

The base-promoted direct amidation of unactivated esters is among the most useful reactions for amide bond formation in contemporary organic chem. The intensive research in this area has led to the development of a number of new methods to achive this transformation. However, to date, the existing literature is more methodol. and in many instances lacks practical directions. Therefore, the full potential of this transformation is yet to be revealed by broadening the substrate scope. In a search for new practical applications of the amidation reaction, herein a comprehensive study of a number of base-promoted direct amidations that encompass a wide range of amines and esters is presented. Furthermore, authors applied their findings in the synthesis of phosphoramidates and several industrially relevant products.

RSC Advances published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C9H9ClN2, Category: ethers-buliding-blocks.

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

Cui, Wenjing published the artcileBase-Free Oxidative Coupling of Amines and Aliphatic Alcohols to Imines over Au-Pd/ZrO₂ Catalyst under Mild Conditions, HPLC of Formula: 6850-57-3, the publication is Russian Journal of Physical Chemistry A (2021), 95(5), 958-967, database is CAplus.

The base-free synthesis of imines from amines and aliphatic alcs. over Au-Pd alloy catalysts under ambient conditions were developed. A series of Au-Pd/ZrO₂ bimetallic catalysts with varying metal loadings and Au : Pd molar ratios were prepared and their catalytic performance were investigated. The 3.0 wt % Au-Pd/ZrO₂ alloy catalyst with Au : Pd molar ratio of 1 : 1 showed the best catalytic performance. Under air atm., various imines were obtained from coupling of amines and aliphatic alcs. without any additives or promoters. The performance of alloy NPs were superior to that of monometallic catalysts due to the synergistic effect which were demonstrated by TEM, XPS, and UV-Vis characterization. Transformation differed slightly from those reactions between amine and benzyl alc. and a possible mechanism were proposed. Moreover, the Au-Pd/ZrO₂ catalyst was easily separated and reused for at least five successive runs with high catalytic activity.

Russian Journal of Physical Chemistry A published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C8H11NO, HPLC of Formula: 6850-57-3.

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

Zhang, Huixia published the artcileDiscovery, SAR, and putative mode of action of N-benzyl-2-methoxybenzamides as potential bleaching herbicides, Application In Synthesis of 6850-57-3, the publication is Pest Management Science (2021), 77(6), 2804-2811, database is CAplus and MEDLINE.

Herbicides acting on biosynthesis of plant pigments have contributed greatly to weed control in recent years. In our previous studies, 2-methoxybenzamides were discovered as a novel type of lead compound for the development of bleaching herbicides. A total of 67 benzamide analogs were synthesized and evaluated for herbicidal activity. The structure-activity relationship (SAR) revealed that a methoxyl substitution at the 2-position of the benzoyl moiety is essential for the herbicidal activity of benzamide derivatives, and introduction of small substituents at the meta- or para-position of the benzylamine moiety is also beneficial. Compounds 4, 43 and 44 showed 100% inhibition against Abutilon theophrasti and Amaranthus retroflexus at an application rate of 150 g a.i. ha^-1. The relationship between the structure and herbicidal activity of 2-methoxybenzamides was discussed intensively. Compounds 4, 43 and 44 may serve as novel candidates with a bleaching effect.

Pest Management Science published new progress about 6850-57-3. 6850-57-3 belongs to ethers-buliding-blocks, auxiliary class Amine,Benzene,Ether, name is (2-Methoxyphenyl)methanamine, and the molecular formula is C4H12ClNO, Application In Synthesis of 6850-57-3.

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

An, Shengxin published the artcileEfficient lignin depolymerization with Ru- and W-modified bi-functional solid acid catalyst, Safety of 1,2-Dimethoxybenzene, the publication is BioResources (2022), 17(1), 1062-1089, database is CAplus.

A novel Ru-modified composite catalyst, Ru-W/Sn-AlOx, was prepared, and the effects of the catalyst on lignin depolymerization were investigated in this study. The catalyst converted approx. 95% lignin into liquid product at 300°C in 12 h and 2/3 of the liquid product could be soluble in petroleum ether. The petroleum ether (PE) soluble product was mainly composed of monomers, dimers and some trimmers. This indeed indicated that the catalyst could effectively depolymerize lignin into small-mol. products. 7.22% of monomers was obtained at 310°C for 12 h. Meanwhile, the catalyst effectively reduced the char formation to 2%. After the catalytic depolymerization, the higher heating value (HHV) of the liquid product increased from 25.7 to 32.4 MJ/kg. The product could be utilized as fuel additive or converted to biofuels. This catalysis system showed great potential in the conversion of lignin into biofuels.

BioResources 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