Tag: M.W=100-150

Li, Xia published the artcileBlue light-powered hydroxynaphthoic acid-titanium dioxide photocatalysis for the selective aerobic oxidation of amines, COA of Formula: C8H11NO, the publication is Journal of Colloid and Interface Science (2021), 534-543, database is CAplus and MEDLINE.

Solar photocatalysis is the key to resolve many environmental challenges but is usually hard to achieve over a metal oxide semiconductor. Therefore, assembling π-conjugated mols. onto semiconductors becomes an efficient approach to solar conversion via ligand-to-metal charge transfer. Here, a rational design of ligands for titanium dioxide (TiO₂) is presented to produce robust visible light photocatalysts. Three hydroxynaphthoic acids (HNAs) were selected as ligands by extending an extra benzene ring of salicylic acid (SA) at 3,4 or 4,5 or 5,6 positions. These ligands could regulate the performance of TiO₂ in which 2-hydroxy-1-naphthoic acid (2H1NA) endows the best outcome. In detail, blue light-powered cooperative photocatalysis of 2H1NA-TiO₂ with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO, 5 mol%) inaugurates the expeditious formation of imines by oxidation of amines with atm. oxygen (O₂). Interestingly, the increase of the O₂ pressure from 1 atm to 0.4 MPa promoted the selective oxidation of benzylamine but thereafter declined with a further boost to 0.6 MPa. Notably, an electron transfer between the oxidatively quenched 2H1NA-TiO₂ and TEMPO is established, offering a new pathway for environmental applications. This work presents a strategy in designing cutting-edge visible light photocatalysts via altering semiconductors with surface ligands.

Journal of Colloid and Interface 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 C8H11NO, COA of Formula: C8H11NO.

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

Zhou, Jun published the artcileVisible light-initiated aerobic oxidation of amines to imines over TiO₂ microspheres with TEMPO⁺PF₆^–, Recommanded Product: (2-Methoxyphenyl)methanamine, the publication is Sustainable Energy & Fuels (2022), 6(3), 894-902, database is CAplus.

Semiconductor photocatalysis holds great promise to drive vital chem. reactions utilizing sunlight. Amongst semiconductors, TiO₂-related materials are one of the most viable to achieve enhanced photocatalytic performances because of their intrinsic merits. Here TiO₂ microspheres assembled from nanocrystals with a distinct hierarchical architecture and a high sp. surface area were fabricated using a simple template-free solvothermal process. Assembling amines on TiO₂ microspheres initiated by visible light can lead to a surface complex that captures visible light for further oxidation of amines. Moreover, the selective oxidation of amines could be boosted by fully exploring the surface polarity of TiO₂ microspheres with more polar 2,2,6,6-tetramethylpiperidine-1-oxoammonium hexafluorophosphate (TEMPO⁺PF₆^–) instead of (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) as the redox mediator. As such, cooperative photocatalysis with TEMPO⁺PF₆^– was framed over TiO₂ microspheres to initiate the efficient and selective aerobic oxidation of benzyl amines into imines. Significantly, the activity of TEMPO⁺PF₆^– surpassed that of TEMPO in aiding the visible light-initiated selective oxidation of amines over TiO₂ microspheres, reaching more than about 3 times in some cases. This work suggests that the surface properties of a semiconductor could be maneuvered to enable coupling with a suitable redox mediator to ameliorate selective organic conversions in an unprecedented manner.

Sustainable Energy & Fuels 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 C7H10O4, Recommanded Product: (2-Methoxyphenyl)methanamine.

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

Divya, R. published the artcileSynthesis, experimental and computational characterizations of 8,9-dimethoxybenzo[b]naphtho[2,3-d] thiophene (DBNT) crystals for electro-mechano utilities, Recommanded Product: 1,2-Dimethoxybenzene, the publication is Inorganic Chemistry Communications (2022), 109249, database is CAplus.

Single crystals of organic nonlinear optical material, 8,9-Dimethoxybenzo[b]naphtho[2,3-d] thiophene (DBNT) are need to grow as the titled crystals have thiophene, since thiophenes are having potential bio activity and industrial uses. The entitled specimen is well-grown by solution growth method and reported for the first time for computational and exptl. study. Characterization of the crystals is made using single crystal x-ray diffraction and compared for the elucidation of structure of DBNT for bond parameters. The titled compound is having the chem. formula C₁₈H₁₄O₂S. From the structure, the planar rings are properly identified. The crystal system of DBNT is monoclinic in nature and the space group is P2₁/n. The lattice constants are 13.0063 Å, 5.9632 Å and 18.3802 Å and β is 104.020° which is determined by XRD anal. The nonlinear optical – NLO characteristics of this material is analyzed and is used for opto-electronic gadgets and filters because of its nonlinearities and in exptl. frequency doubling circuits. The composition of elements present in the grown specimen of DBNT crystal was theor. and exptl. analyzed. The morphol. effect of DBNT is analyzed and reported for the surfaces of crystal with magnifications and the dielec. behavior was studied properly for all polarizations and reported for entitled crystalline DBNT material, in mechano use by preloading data as coated DBNT. The dielec. and crystalline nature of the specimen is by elec. correlation and the thin film influx refers the proper grown confirmation of the DBNT and encompasses the filter usage exclusively of opto-electronic way.

Inorganic Chemistry Communications 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, Recommanded Product: 1,2-Dimethoxybenzene.

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

Singh, Sanjay published the artcileDevelopment of Transition-Metal-Free Lewis Acid-Initiated Double Arylation of Aldehyde: A Facile Approach Towards the Total Synthesis of Anti-Breast-Cancer Agent, Recommanded Product: 1,2-Dimethoxybenzene, the publication is Chemistry – A European Journal (2022), 28(14), e202104545, database is CAplus and MEDLINE.

This work describes a mild and robust double hydroarylation strategy for the synthesis of sym. /unsym. diaryl- and triarylmethanes in excellent yields using Lambert salt (0.2-1.0 mol%). Despite the anticipated challenges associated with controlling selective product formation, unsym. diaryl- and triarylmethanes products are obtained unprecedentedly. A highly efficient gram scale reaction has also been reported (TON for sym. product=475 and for unsym. product=390). The synthetic utility of the methodol. is demonstrated by the preparation of several unexplored diaryl- and triarylmethane-based biol. relevant mols., such as arundine, vibrindole A, turbomycin B, and certain anti-inflammatory agents. A total synthesis of an anti-breast-cancer agent is also demonstrated. Control experiments, Hammett anal., HRMS and GC-MS studies reveal the reaction intermediates and reaction mechanism.

Chemistry – A European Journal 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 C13H18BBrO3, Recommanded Product: 1,2-Dimethoxybenzene.

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

Ma, Zhiming published the artcileCoexistence of Fe Nanoclusters Boosting Fe Single Atoms to Generate Singlet Oxygen for Efficient Aerobic Oxidation of Primary Amines to Imines, Category: ethers-buliding-blocks, the publication is ACS Catalysis (2022), 12(9), 5595-5604, database is CAplus.

Tuning the geometric and electronic structure of the single-metal-atom catalysts via simultaneous presence of metal nanoparticles or nanoclusters (NCs) offers an alternative avenue to improving their catalytic performance. Herein, that the coexistence of Fe NCs in proximity to Fe single atoms on N-doped porous carbon can significantly improve the catalytic performance in aerobic oxidation of primary amines to imines using air as the oxidant was demonstrate. A broad spectrum of primary aromatic, heterocyclic, and aliphatic amines was efficiently and selectively oxidized into their corresponding imines in good to high yields. Exptl. measurements and theor. calculations reveal that the proximity of Fe NCs interacts with Fe single atoms, which not only benefits the adsorption of mol. O₂ and amine substrates but also promotes the activation of O₂ to selectively generate singlet oxygen (¹O₂) and then facilitates the key intermediate imine formation via H-atom abstraction with a lower energy barrier, thereby significantly boosting the reaction activity.

ACS Catalysis 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, Category: ethers-buliding-blocks.

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

Jiang, Jun published the artcileDonor-Acceptor Type Conjugated Microporous Polymer as a Metal-Free Photocatalyst for Visible-Light-Driven Aerobic Oxidative Coupling of Amines, Category: ethers-buliding-blocks, the publication is Catalysis Letters (2021), 151(11), 3145-3153, database is CAplus.

Developing cheap, highly efficient, metal-free heterogeneous photocatalysts remain a great challenge in photoredox reactions. Herein, we utilize a typical Suzuki coupling of low-cost triphenylamine derivative and 9,10-dibromoanthracene to synthesis a donor-acceptor type conjugated microporous polymer (denoted as PAA-CMP). As expected, heterogeneous PAA-CMP exhibits excellent photocatalytic performance, good functional group tolerance and satisfying recyclability in metal-free aerobic oxidative coupling of amines to imines driven by visible light, which is due to its absolute energy level positions and good physicochem. stability. More excitingly, PAA-CMP can enable the gram-scale air-oxidized photocatalytic conversion under natural sunlight irradiation, yielding the desired imine product with an isolated yield of 65% for 48 h. The current work provides a great application prospect for CMPs in low-cost and large-scale organic industrial production in the future. The prepared donor-acceptor (D-A) type conjugated microporous polymer (PAA-CMP) as a metal-free and heterogeneous photocatalyst enable the gram-scale air-oxidized photocatalytic conversion of benzylamine into N-benzylidenebenzylamine under natural sunlight irradiation, yielding the desired imine product with an isolated yield of 65%.

Catalysis Letters 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, Category: ethers-buliding-blocks.

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

Zou, Wen published the artcileEnhancement of the visible-light absorption and charge mobility in a zinc porphyrin polymer/g-C₃N₄ heterojunction for promoting the oxidative coupling of amines, Recommanded Product: (2-Methoxyphenyl)methanamine, the publication is Applied Catalysis, B: Environmental (2021), 119863, database is CAplus.

Graphitic carbon nitride (g C₃N₄, CN) has been widely used as a photocatalyst due to its high stability and suitable band gap. However, its further development is limited due to inefficient light harvesting and rapid recombination of photogenerated carriers. In this study, a visible-light-responsive zinc porphyrin (ZnP)/CN heterojunction photocatalyst was synthesized by the combination of CN and a zinc-porphyrin-conjugated microporous polymer (ZnP-CMP). ZnP/CN exhibited excellent photocatalytic activity for the oxidative coupling of amines to imines under visible-light irradiation The efficiency of the as-developed photocatalyst was 25 times greater than that of CN and about 2 times greater than that of ZnP-CMP. The significantly enhanced catalytic efficiency was attributed to the promotion of visible-light harvesting and photogenerated charge mobility via the introduction of ZnP-CMP. The ZnP/CN heterojunction photocatalyst also exhibited excellent broad substrate scope, stability, and reusability.

Applied Catalysis, B: Environmental 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 C13H14N2O, Recommanded Product: (2-Methoxyphenyl)methanamine.

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

Liu, E. published the artcileStudy on the relationship between structure and fluorescence properties of anthracene derivatives, Category: ethers-buliding-blocks, the publication is Journal of Molecular Structure (2022), 132029, database is CAplus.

Five anthracene derivatives using quinoa perch ether and 2-acetaldehyde pyridine or 4-acetaldehyde pyridine as raw material were designed and synthesized. Their single crystals were obtained and determined by X-ray diffraction anal. and their Hirshfeld surface anal. had also been done. Different compounds with different structures could be obtained from the same raw material by changing the reaction conditions and the concentration of acid. In terms of performance, the hydroanthracene compounds did not produce fluorescence, but the anthracene compounds have strong fluorescence properties. At the same time, Hirschfeld surface anal. was used in this paper to study the interaction between mols. In crystals with visual graphics, which had a certain scientific significance to the identification of close contacts between atoms in neighboring mols. and supramol. forces in mols.

Journal of Molecular Structure 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

Hu, Liqun published the artcileAn Intermolecular Hydroarylation of Highly Deactivated Styrenes Catalyzed by Re₂O₇/HReO₄ in Hexafluoroisopropanol, Synthetic Route of 91-16-7, the publication is ACS Catalysis (2022), 12(10), 5857-5863, database is CAplus.

Here, authors describe an activation mode for unactivated alkenes on the basis of a synergy between Re₂O₇/HReO₄ and hexafluoroisopropanol (HFIP). Highly electron-deficient styrenes have been activated to effect a challenging intermol. hydroarylation with different arenes to give a variety of diarylalkanes in high efficiency. This method is characterized by mild reaction condition, broad substrate scope, high chem. yields, and minimal waste generation. The potential synthetic application of this methodol. was exemplified by the efficient synthesis of a retinoic acid receptor (RAR) agonist. DFT calculations and deuterium-labeling experiments were conducted to elucidate the reaction mechanism, and both confirmed the critical role of HFIP, which significantly reduced the energetical barriers for several key steps of this transformation via a network of hydrogen bonding to perrhenate anion with two equivalent of HFIP.

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, Synthetic Route of 91-16-7.

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

Boyle, Mhairi published the artcileAmide Bond Formation via the Rearrangement of Nitrile Imines Derived from N-2-Nitrophenyl Hydrazonyl Bromides, Synthetic Route of 6850-57-3, the publication is Organic Letters (2022), 24(1), 334-338, database is CAplus and MEDLINE.

Rearrangement of highly reactive nitrile imines derived from N-2-nitrophenyl hydrazonyl bromides could be harnessed for the facile construction of amide bonds was reported. This amidation reaction was found to be widely applicable to the synthesis of primary, secondary, and tertiary amides and was used as the key step in the synthesis of the lipid-lowering agent bezafibrate. The orthogonality and functional group tolerance of this approach was exemplified by the N-acylation of unprotected amino acids.

Organic Letters 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, Synthetic Route of 6850-57-3.

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