Month: December 2022

Heilmann, S. M. published the artcileO-Hydroxyethylation of 1,1-dihydroperfluorinated alcohols, Name: 2-(2,2,2-Trifluoroethoxy)ethanol, the publication is Journal of Fluorine Chemistry (1992), 59(3), 387-96, database is CAplus.

A convenient transformation of 1,1-dihydroperfluorinated alcs. into O-hydroxyethyl derivatives (R_FCH₂OCH₂CH₂OH) is described in which ethylene carbonate is utilized as the alkylating agent. Tetraalkylammonium iodides and trialkylamines are effective catalysts.

Journal of Fluorine Chemistry published new progress about 2358-54-5. 2358-54-5 belongs to ethers-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Aliphatic hydrocarbon chain,Alcohol,Ether, name is 2-(2,2,2-Trifluoroethoxy)ethanol, and the molecular formula is C4H7F3O2, Name: 2-(2,2,2-Trifluoroethoxy)ethanol.

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

Yang, Yang published the artcileIncreasing contribution of microbial residues to soil organic carbon in grassland restoration chronosequence, Synthetic Route of 134-96-3, the publication is Soil Biology & Biochemistry (2022), 108688, database is CAplus.

Grassland restoration across the world increases soil organic carbon (SOC) sequestration which is critical for global C cycling and CO₂ removal from the atm. However, the relative importance of plant- and microbially-derived C for SOC is still an open question for temperate grasslands. Here, amino sugars and lignin phenols were used as biomarkers to investigate the relative microbial and plant residue contribution to SOC in a 30-yr (1-, 5-, 10-, 15-, 25-, 30-yr) restoration chronosequence of temperate grassland. The contribution of microbially-derived C (from 4.9 to 13 g kg^-1) to SOC was much greater than that of plant-derived C (from 1.3 to 2.3 g kg^-1). At the early stage of restoration (<15 years), grassland soils accumulated more C in the form of plant-derived C. In contrast, grassland soils at the late stage of restoration (>15 years) accumulated more microbially-derived C, and less from plant residues. These findings highlight the dominance of microbial contribution to SOC stabilization compared with plant residues. The contribution of bacteria-derived C to SOC gradually increased from 29% to 50% with progress of grassland restoration, while the contribution of fungal C to SOC decreased from 30% to 21%. Consequently, microbial residue contribution to SOC shifts from fungal and bacterial to mainly bacterial residues during grassland restoration. This shift may be due to the faster bacterial growth and a increasing living biomass during grassland restoration, leading to higher accumulation of bacterial residues. Correlation anal. and random forest models showed that belowground plant biomass, soil pH, and living microbial biomass were the main factors regulating plant-derived C. The microbially-derived C in SOC, however, was dependent on living microbial biomass, soil pH and dissolved organic C. Concluding, grassland restoration increased soil C sequestration primarily by microbial necromass (mainly bacterial necromass), and is affected by abiotic and biotic factors, as well as plant C input.

Soil Biology & Biochemistry published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C8H11BO3, Synthetic Route of 134-96-3.

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

Dellsperger, Simon published the artcileSynthesis and optical properties of novel poly(p-phenyleneethynylene)s, Application In Synthesis of 146370-51-6, the publication is Macromolecular Chemistry and Physics (2000), 201(2), 192-198, database is CAplus.

In order to explore the influence of chem. modifications on the photophys. properties of poly(p-phenyleneethynylene)s (PPEs), a series of PPE-copolymers was synthesized, employing Heck-type cross-coupling reactions. UV/Vis absorption and photoluminescence experiments clearly demonstrate that the design of PPE-copolymers which comprise conjugated segments of well-defined length and (aliphatic) spacers in a strictly alternating fashion allows to tune the bandgap to higher energies, and thus the absorption and emission maxima to shorter wavelengths. The derivatization of the PPE backbone with electron-withdrawing substituents, by contrast, is found to be significantly less effective and only leads to comparably small shifts in the absorption and emission spectra.

Macromolecular Chemistry and Physics published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C15H24O2, Application In Synthesis of 146370-51-6.

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

Dreher, Spencer D. published the artcileEfficient Cross-Coupling of Secondary Alkyltrifluoroborates with Aryl Chlorides – Reaction Discovery Using Parallel Microscale Experimentation, Recommanded Product: 2-Isopropylanisole, the publication is Journal of the American Chemical Society (2008), 130(29), 9257-9259, database is CAplus and MEDLINE.

Microscale parallel experimentation was used to discover three catalyst systems capable of coupling secondary organotrifluoroborates with sterically and electronically demanding aryl chlorides and bromides. The ensuing results represent the first comprehensive study of alkylboron coupling to aryl chlorides and, in particular, using secondary alkylboron partners. A ligand-dependent β-hydride elimination/reinsertion mechanism was implicated in the cross-coupling of more hindered substrates, leading to isomeric mixtures of coupled products in some cases.

Journal of the American Chemical Society published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C10H14O, Recommanded Product: 2-Isopropylanisole.

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

Crews, Phillip published the artcileNatural Product Phenolic Diglycosides Created from Wildfires, Defining Their Impact on California and Oregon Grapes and Wines, Formula: C9H10O4, the publication is Journal of Natural Products (2022), 85(3), 547-561, database is CAplus and MEDLINE.

Forest fires produce malodorous phenols, bioaccumulated in grapes as odorless phenol glycosides (mono- to tri-), and produce unpleasant smoke tainted wines when these complexes are transformed by glycosidases in saliva. Metabolomic analyses were used to further understand smoke taint by quantitating marker phenolic diglycosides via UHPLC separations and MS/MS multiple reaction monitoring. A collection of grapes and wines provided data to forecast wine quality of grapes subjected to wildfire smoke infestations; the analytics used a panel of reference compounds (1-6). Overall, eight different Vitis vinifera varietals were examined from 2017-2021 vintages involving >218 distinct samples (wines and/or grapes) from 21 different American Viticulture Areas. Results acquired allowed correlation of phenolic diglycoside levels as a function of grape cultivar, varietal clones, and intensity of wildfire smoke. Baseline data were tabulated for nonsmoked samples (especially, Cabernet Sauvignon having a sum 1-6 of <6μg/L) and then compared to those exposed to six other levels of smoke. Outcomes established that (1) analyzing paired samples (bottled wines vs. smoke-exposed grapes) can provide diagnostic metabolomic data, (2) phenolic diglycosides are stable in wines aged for >2.5 years, and (3) major gaps exist in our current understanding of this pool of metabolites.

Journal of Natural Products published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C9H10O4, Formula: C9H10O4.

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

Li, Peiyu published the artcileAn azine-linked 2D porphyrinic covalent organic framework for red light photocatalytic oxidative coupling of amines, HPLC of Formula: 6850-57-3, the publication is Materials Today Chemistry (2022), 100953, database is CAplus.

The construction of two-dimensional covalent organic frameworks (2D COFs) with robust stability for photocatalysis has gained intensive attention recently. Herein, we report the design and synthesis of a highly crystalline azine-linked porphyrinic 2D COF (Por-HZ-COF). Our results clearly show that Por-HZ-COF adopts an eclipsed AA stacking structure with a high Brunauer-Emmett-Teller (BET) sp. surface area of 1586 m2/g. In addition, Por-HZ-COF is chem. stable under various conditions, even in 12 M sodium hydroxide aqueous solution or 9 M hydrochloric acid. Moreover, Por-HZ-COF can be used for the photocatalytic aerobic oxidative coupling of benzylamines under red light irradiation with high activity and good reusability. This study demonstrates a novel robust 2D COF with azine linkage that has promising applications in photocatalysis.

Materials Today Chemistry 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

Yang, Biao published the artcilePhotoacid-Enabled Synthesis of Indanes via Formal [3 + 2] Cycloaddition of Benzyl Alcohols with Olefins, Product Details of C9H10O4, the publication is Organic Letters (2022), 24(10), 2040-2044, database is CAplus and MEDLINE.

An environmentally friendly and high diastereoselective method for synthesizing indanes was developed via a metastable-state photoacid system containing catalytic protonated merocyanine (MEH). Under visible-light irradiation, MEH yields a metastable spiro structure and liberated protons, which facilitated the formation of carbocations from benzyl alcs., thus delivering diverse mols. in the presence of various nucleophiles. Mainly, a variety of indanes was easily obtained from benzyl alcs. and olefins and water was the only byproduct.

Organic Letters published new progress about 134-96-3. 134-96-3 belongs to ethers-buliding-blocks, auxiliary class Immunology/Inflammation,COX,Natural product, name is 4-Hydroxy-3,5-dimethoxybenzaldehyde, and the molecular formula is C5H7NO, Product Details of C9H10O4.

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

Wu, Shaofeng published the artcilePhosphorous Acid-Catalyzed Alkylation of Phenols with Alkenes, Safety of 2-Methoxynaphthalene, the publication is Journal of Organic Chemistry (2020), 85(22), 14307-14314, database is CAplus and MEDLINE.

A H₃PO₃-catalyzed alkylation of phenols with alkenes is achieved in a facile, efficient, and selective manner. The reaction shows a unique selectivity, i.e., excellent regioselectivity, thorough suppression of overalkylation, without alkylation of a simple Ph ring, and can selectively provide ortho-, meta-, or para-alkylated phenol derivatives in good to excellent yields. This feature along with mild reaction conditions, sensitive functional group tolerance, and scale-up synthesis and late modification of phenolic bioactive compounds make it an ideal and practical alternative for the modification of phenols.

Journal of Organic Chemistry published new progress about 93-04-9. 93-04-9 belongs to ethers-buliding-blocks, auxiliary class Naphthalene,Ether, name is 2-Methoxynaphthalene, and the molecular formula is C25H16O, Safety of 2-Methoxynaphthalene.

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

Paquette, Leo A. published the artcileSynthesis of optically active triazolinediones and examination of their utility for inducing asymmetry in Diels-Alder cycloaddition reactions, Application In Synthesis of 2944-47-0, the publication is Journal of Organic Chemistry (1980), 45(25), 5105-13, database is CAplus.

Optically active triazolinedione derivatives of (-)-PhCHMeNH₂, (+)-dehydroabietylamine acetate, and (+)-camphor, I–III, resp., were prepared and their ability to discriminate between diastereomeric transition states in their Diels-Alder reactions with racemic and optically active p-mentha-2,4-diene and α-phellandrene was studied. In each case plotting the [α]_D of the adduct from the diene of known optical purity and that of the adduct from the racemic dienes vs. diastereomeric purity served to delineate the enantioselectivity and the absolute configuration of the adducts. The triazolinedione derivatives are also useful for nondestructive resolution of compounds

Journal of Organic Chemistry published new progress about 2944-47-0. 2944-47-0 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 2-Isopropylanisole, and the molecular formula is C10H14O, Application In Synthesis of 2944-47-0.

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

Minar, Norma K. published the artcileGuided in Situ Polymerization of MEH-PPV in Mesoporous Titania Photoanodes, Related Products of ethers-buliding-blocks, the publication is ACS Applied Materials & Interfaces (2015), 7(19), 10356-10364, database is CAplus and MEDLINE.

Incorporation of conjugated polymers into porous metal oxide networks is a challenging task, which is being pursued via many different approaches. We have developed the guided in situ polymerization of poly(2-methoxy-5-(2′-ethylhexyloxy)-p-phenylenevinylene) (MEH-PPV) in porous titania films by means of surface functionalization. The controlled polymerization via the Gilch route was induced by an alkoxide base and by increasing the temperature The selected and specially designed surface-functionalizing linker mols. mimic the monomer or its activated form, resp. In this way, we drastically enhanced the amount of MEH-PPV incorporated into the porous titania phase compared to nonfunctionalized samples by a factor of 6. Addnl., photovoltaic measurements were performed. The devices show shunting or series resistance limitations, depending on the surface functionalization prior to in situ polymerization of MEH-PPV. We suggest that the reason for this behavior can be found in the orientation of the grown polymer chains with respect to the titania surface. Therefore, the geometry of the anchoring via the linker mols. is relevant for exploiting the full electronic potential of the conjugated polymer in the resulting hybrid composite. This observation will help to design future synthesis methods for new hybrid materials from conjugated polymers and n-type semiconductors to take full advantage of favorable electronic interactions between the two phases.

ACS Applied Materials & Interfaces published new progress about 146370-51-6. 146370-51-6 belongs to ethers-buliding-blocks, auxiliary class Benzene,Ether, name is 1-((2-Ethylhexyl)oxy)-4-methoxybenzene, and the molecular formula is C15H24O2, Related Products of ethers-buliding-blocks.

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