Category: 91-16-7

Aranzazu, Sandra-L. published the artcileBF₃-Mediated Acetylation of Pyrazolo[1,5-a]pyrimidines and Other π-Excedent (N-Hetero)arenes, Quality Control of 91-16-7, the publication is Journal of Organic Chemistry (2022), 87(15), 9839-9850, database is CAplus and MEDLINE.

An operably simple microwave-assisted BF₃-mediated acetylation reaction of pyrazolo[1,5-a]pyrimidines and a plausible mechanism based on d. functional theory (DFT) theor. calculations for this transformation are reported. Remarkably, and to the best of authors knowledge, this is the first example of the direct acetylation for the functional pyrazolo[1,5-a]pyrimidine (PP) core. The synthesis of this essential building block is reported in high yields using mild reaction conditions, inexpensive reagents, and even substrates with electron-deficient or highly hindered groups. In addition, one of the new Me ketones was successfully used as a substrate for producing novel and valuable bis-electrophilic compounds with yields of up to 90%. Notably, the discovered acetylation method was successfully applied in other π-excedent (N-hetero)aromatic substrates.

Journal of Organic 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, Quality Control of 91-16-7.

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

Zhang, Wenxuan published the artcileEnantioselective Friedel-Crafts Reaction of 2-Alkynyphenols with Aromatic Ethers by Chiral Bronsted Acid Catalysis, Category: ethers-buliding-blocks, the publication is Journal of Organic Chemistry (2022), 87(14), 9100-9111, database is CAplus and MEDLINE.

Herein, authors report chiral strong Bronsted acid-catalyzed enantioselective Friedel-Crafts reaction of 2-alkynyphenols with aromatic ethers. The reaction affords the corresponding axially chiral styrenes in up to 91% yield and 97% ee.

Journal of Organic 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 C15H24S, Category: ethers-buliding-blocks.

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

Ashirov, Timur published the artcileSalt-Templated Solvothermal Synthesis of Dioxane-Linked Three-Dimensional Nanoporous Organic Polymers for Carbon Dioxide and Iodine Capture, Safety of 1,2-Dimethoxybenzene, the publication is ACS Applied Nano Materials, database is CAplus.

Precise control over the textural properties of porous organic polymers, POPs, is a daunting task, yet highly important to achieve desired porosity and pore connectivity for the target applications. Accordingly, the introduction of hard templates in the solvothermal synthesis of POPs could help to control the surface area and pore size without altering their chem. structure. In this direction, here, we synthesized a dioxane linked 3D tetraphenylene-based nanoporous organic polymer (3D-tPOP) using low-cost and readily available NaCl salt as a hard template under solvothermal conditions. The presence of hard template enhanced the surface area and enabled control over the morphol., micropore/mesopore ratio as well as the pore volume with respect to the template amount Whereas micron-sized NaCl templates facilitated the surface growth of a microporous polymer network, nanosized NaCl crystallites led to formation of mesopores. The resulting 3D-tPOPs showed tunable micropore/mesopore ratios and surface areas in the range of 349 to 1058 m² g^-1 with a linear correlation to the template amount High CO₂ uptake capacity of 5.02 mmol g^-1 at 273 K, 1 bar and iodine uptake capacity of 1180 mg g^-1 were observed for 3D-tPOPs with micropore and mesopore ratios of 50.2% and 71.4%, resp.

ACS Applied Nano Materials 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

Nakib, Rifka published the artcileRetama sphaerocarpa, Atractylis serratuloides and Eruca sativa honeys from Algeria: Pollen dominance and volatile profiling (HS-SPME/GC-MS), Application In Synthesis of 91-16-7, the publication is Microchemical Journal (2022), 107088, database is CAplus.

The volatile fraction of three monofloral honey types produced in arid and semiarid areas of Algeria was studied to establish a link between their chem. composition and their botanical origin. Palynol. anal. was performed to confirm the main botanical origin. Volatile extraction using HS-SPME coupled to GC-MS revealed exclusive components for each type: 1,6,10-dodecatrien-3-ol,3,7,11-trimethyl-, (E); 1,6-octadien-3-ol,3,7- dimethyl; phenol, 2-methoxy and 2-naphtalene methanol, decahydro-α,α,4a- trimethyl-8-methylene-, [2R-(2α,4aα,8a,8aβ)] for Atractylis honey, lilac aldehyde and lilac aldehyde D for Retama honey, and di-Me trisulfide for Eruca. The PCA anal. made it possible to correlate some volatile compounds with the most important pollen types, and to evaluate the authenticity related to the geog. and botanical origin of the honey.

Microchemical 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 C8H10O2, Application In Synthesis of 91-16-7.

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

Sun, Kai published the artcileA general electron donor-acceptor complex for photoactivation of arenes via thianthrenation, SDS of cas: 91-16-7, the publication is Chemical Science (2022), 13(19), 5659-5666, database is CAplus and MEDLINE.

General photoactivation of electron donor-acceptor (EDA) complexes between arylsulfonium salts and 1,4-diazabicyclo[2.2.2]octane with visible light or natural sunlight was discovered. This practical and efficient mode enabled the production of aryl radicals under mild conditions, providing an unrealized opportunity for two-step para-selective C-H functionalization of complex arenes. The novel mode for generating aryl radicals via an EDA complex was well supported by UV-vis absorbance measurements, NMR titration experiments, and d. functional theory (DFT) calculations The method was applied to the regio- and stereo-selective arylation of various N-heterocycles under mild conditions, yielding an assembly of challengingly linked heteroaryl-(hetero)aryl products.

Chemical Science 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 C12H14BNO2, SDS of cas: 91-16-7.

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

Wang, Jiatong published the artcileInsights into crucial odourants dominating the characteristic flavour of citrus-white teas prepared from citrus reticulata Blanco ‘Chachiensis’ and Camellia sinensis ‘Fudingdabai’, Synthetic Route of 91-16-7, the publication is Food Chemistry (2022), 132048, database is CAplus and MEDLINE.

Citrus-white teas (CWs), which possess a balanced flavor of tea and citrus, are becoming more popular worldwide; however, their characteristic flavor and odourants received limited research. Volatile components of two types of CWs prepared from Citrus reticulata Blanco’Chachiensis’ and Camellia sinensis ‘Fudingdabai’ were comprehensively investigated using a combination of stir bar sorptive extraction and gas chromatog.-mass spectrometry (GC-MS). Ninety-nine crucial odourants in the CWs were quantified by applying GC-olfactometry/MS, significant differences were compared, and their odor activity values (OAVs) were calculated Twenty-two odourants (in total 2628.09 and 1131.18 mg/kg resp.) were further confirmed as traditional CW (CW-A) and innovated CW (CW-B) characteristic flavor crucial contributors which all possessed > 1 OAVs, particularly limonene (72919 in CW-A) and trans-β-ionone (138953 in CW-B). The unravelling of CWs aroma composition will greatly expanding our understanding of tea aroma chem. and the potential aroma interactions will offer insights into tea blending technologies.

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 C8H6ClN, Synthetic Route of 91-16-7.

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

Caliskan, Esra published the artcileInvestigation of the Side Chain Effect on Gas and Water Vapor Transport Properties of Anthracene-Maleimide Based Polymers of Intrinsic Microporosity, Application of 1,2-Dimethoxybenzene, the publication is Polymers (Basel, Switzerland) (2022), 14(1), 119, database is CAplus and MEDLINE.

In the present work, a set of anthracene maleimide monomers with different aliphatic side groups obtained by Diels Alder reactions were used as precursors for a series of polymers of intrinsic microporosity (PIM) based homo- and copolymers that were successfully synthesized and characterized. Polymers with different sizes and shapes of aliphatic side groups were characterized by size-exclusion chromatog. (SEC), (NMR) ¹H-NMR, thermogravimetric (TG) anal. coupled with Fourier-Transform-IR (FTIR) spectroscopy (TG-FTIR) and d. measurements. The TG-FTIR measurement of the monomer-containing Me side group revealed that the maleimide group decomposes prior to the anthracene backbone. Thermal treatment of homopolymer methyl-100 thick film was conducted to establish retro-Diels Alder rearrangement of the homopolymer. Gas and water vapor transport properties of homopolymers and copolymers were investigated by time-lag measurements. Homopolymers with bulky side groups (i-propyl-100 and t-butyl-100) experienced a strong impact of these side groups in fractional free volume (FFV) and penetrant permeability, compared to the homopolymers with linear alkyl side chains. The effect of anthracene maleimide derivatives with a variety of aliphatic side groups on water vapor transport is discussed. The maleimide moiety increased the water affinity of the homopolymers. Phenyl-100 exhibited a high water solubility, which is related to a higher amount of aromatic rings in the polymer. Copolymers (methyl-50 and t-butyl-50) showed higher CO₂ and CH₄ permeability compared to PIM-1. In summary, the introduction of bulky substituents increased free volume and permeability while the maleimide moiety enhanced the water vapor affinity of the polymers.

Polymers (Basel, Switzerland) 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 of 1,2-Dimethoxybenzene.

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

Das, Agnideep published the artcileA Single Bioinspired Hexameric Nickel Catechol-Alloxazine Catalyst Combines Metal and Radical Mechanisms for Alkene Hydrosilylation, Application of 1,2-Dimethoxybenzene, the publication is Chemistry – A European Journal (2022), 28(35), e202200596, database is CAplus and MEDLINE.

Mechanisms combining organic radicals and metallic intermediates hold strong potential in homogeneous catalysis. Such activation modes require careful optimization of two interconnected processes: one for the generation of radicals and one for their productive integration towards the final product. We report that a bioinspired polymetallic nickel complex can combine ligand- and metal-centered reactivities to perform fast hydrosilylation of alkenes under mild conditions through an unusual dual radical- and metal-based mechanism. This earth-abundant polymetallic complex incorporating a catechol-alloxazine motif as redox-active ligand operates at low catalyst loading (0.25 mol%) and generates silyl radicals and a nickel-hydride intermediate through a hydrogen atom transfer (HAT) step. Evidence of an isomerization sequence enabling terminal hydrosilylation of internal alkenes points towards the involvement of the nickel-hydride species in chain walking. This single catalyst promotes a hybrid pathway by combining synergistically ligand and metal participation in both inner- and outer- sphere processes.

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 C8H10O2, Application of 1,2-Dimethoxybenzene.

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

Zhang, Jinhong published the artcileStudy on the Staged and Direct Fast Pyrolysis Behavior of Waste Pine Sawdust Using High Heating Rate TG-FTIR and Py-GC/MS, Application In Synthesis of 91-16-7, the publication is ACS Omega (2022), 7(5), 4245-4256, database is CAplus and MEDLINE.

To understand the fast pyrolysis kinetics and product evolution of waste pine sawdust, high heating rate thermogravimetry-Fourier transform IR (TG-FTIR) was used to obtain the kinetic parameters and the chem. groups formed during the pyrolysis process, while pyrolysis-gas chromatog./mass spectrometry (Py-GC/MS) was used to investigate the detailed compositions of products under the staged (seven stages from 300 to 600°C) and direct fast pyrolysis process. Spectral bands were identified for acids, alcs., aldehydes, aromatics, esters, ethers, hydrocarbons, ketones, phenols, and sugars. Research found that the apparent activation energy for fast pyrolysis is much higher than that of slow pyrolysis. The evolution of CO₂ is the major deoxygenation route. Cracking mainly occurred at the 450°C stage with phenols, ketones, aldehydes, and sugars as the main products. The product distributions for different stages are significantly different; the selectivity of aldehydes decreased, while phenols showed an upward trend with an increase in pyrolysis temperature Ketones and sugars reached their peak values at 450°C. The changes in the mol. composition of each stage helped to understand the pyrolysis process. Compared with the staged pyrolysis, the direct pyrolysis process had higher selectivity of acids, aldehydes, esters, and sugars and lower selectivity of phenols, ketones, and alcs.

ACS Omega 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 C13H26N2, Application In Synthesis of 91-16-7.

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

Tasnim, Tarannum published the artcileRadical Perfluoroalkylation Enabled by a Catalytically Generated Halogen Bonding Complex and Visible Light Irradiation, Safety of 1,2-Dimethoxybenzene, the publication is Organic Letters (2022), 24(1), 446-450, database is CAplus and MEDLINE.

Exploiting charge-transfer complexes in visible light-promoted single-electron redox reactions is a promising route for opening novel synthetic pathways, and catalytic approaches to complex formation are critical for facilitating this chem. This report describes the use of a substituted hydroquinone catalyst to promote radical perfluoroalkylation reactions. Mechanistic studies indicate that the reaction is initiated through formation of a visible light-absorbing halogen bonding complex between the hydroquinone catalyst and the perfluoroalkyl halide radical precursor.

Organic Letters 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 C39H35N5O8, Safety of 1,2-Dimethoxybenzene.

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