Category: 645-56-7

Meng, Qinglei published the artcileSustainable production of benzene from lignin, Category: alcohols-buliding-blocks, the publication is Nature Communications (2021), 12(1), 4534, database is CAplus and MEDLINE.

Benzene is a widely used commodity chem., which is currently produced from fossil resources. Lignin, a waste from lignocellulosic biomass industry, is the most abundant renewable source of benzene ring in nature. Efficient production of benzene from lignin, which requires total transformation of Csp2-Csp3/Csp2-O into C-H bonds without side hydrogenation, is of great importance, but has not been realized. Here, we report that high-silica HY zeolite supported RuW alloy catalyst enables in situ refining of lignin, exclusively to benzene via coupling Bronsted acid catalyzed transformation of the Csp2-Csp3 bonds on the local structure of lignin mol. and RuW catalyzed hydrogenolysis of the Csp2-O bonds using the locally abstracted hydrogen from lignin mol., affording a benzene yield of 18.8% on lignin weight basis in water system. The reaction mechanism is elucidated in detail by combination of control experiments and d. functional theory calculations The high-performance protocol can be readily scaled up to produce 8.5 g of benzene product from 50.0 g lignin without any saturation byproducts. This work opens the way to produce benzene using lignin as the feedstock efficiently.

Nature Communications published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, Category: alcohols-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Ding, Tao published the artcilePromoted Production of Phenolic Monomers from Lignin-First Depolymerization of Lignocellulose over Ru Supported on Biochar by N,P-co-Doping, Category: alcohols-buliding-blocks, the publication is ACS Sustainable Chemistry & Engineering (2022), 10(7), 2343-2354, database is CAplus.

Co-doping of heteroatoms into the support of metal-supported catalysts is a prevalent method to improve the catalytic performance by adjusting metal-support interactions. This paper investigated the catalytic performances of Ru supported on biomass-derived char (Ru@Char), N-doped char (Ru@N-Char), and N,P-co-doped char (Ru@NP-Char) in the emerging lignin-first depolymerization for both poplar (hardwood) and pine (softwood) samples, with an emphasis on the production of phenolic monomers. Various characterizations of the prepared catalysts showed that the codoping of N,P not only facilitated the formation of micropores in the char, but also introduced weak and moderate acid sites. Furthermore, the sizes of Ru nanoparticles on the codoped char became smaller and the proportion of metallic Ru species was increased, resulting from electron transfer from Ru to the codoped char. The yields of the phenolic monomers from poplar and pine over Ru@NP-Char were as high as 57.98 and 17.53 weight %-Klason lignin, resp., which were improved by factors of 1.4-2.5 in comparison to Ru@Char and Ru@N-Char. Full delignification during the depolymerization of both poplar and pine was also achieved over Ru@NP-Char.

ACS Sustainable Chemistry & Engineering published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, Category: alcohols-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Yu, Zhipeng published the artcilePotential mechanisms of the anti-hypertensive effects of RVPSL on spontaneously hypertensive rats using non-targeted serum metabolomics, Recommanded Product: 4-Propylphenol, the publication is Food & Function (2021), 12(18), 8561-8569, database is CAplus and MEDLINE.

The study aimed to investigate potential mechanisms for the anti-hypertensive effects of RVPSL on spontaneously hypertensive rats (SHRs) using a non-targeted metabonomic approach. In this study, UPLC/MS-based non-targeted metabolomics was performed to discover metabolite variation of serum in SHRs with RVPSL treatment. As a result, the serum metabolites of SHRs that were administered RVPSL for four weeks exhibited distinct alterations. Nine potential biomarkers, i.e., choline, adenosine, adrenic acid, L-tryptophan, niacinamide, glycocholic acid, propiolic acid, D-glyceraldehyde 3-phosphate, and phosphoglycolic acid, were significantly altered, which were mainly involved in lipid metabolism, vitamin and amino acid metabolism, purine metabolism, the MAPK signaling pathway, and the renin-angiotensin system. This study suggested that RVPSL potentially exerted potent effects of alleviating hypertension in the SHRs mainly via integrated regulations of metabolism and production of choline, L-tryptophan, nicotinamide, and adenosine.

Food & Function published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is Al2H32O28S3, Recommanded Product: 4-Propylphenol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Gollapelli, Krishna Kumar published the artcileRh(I)-catalyzed stereoselective desymmetrization of prochiral cyclohexadienones via highly exo-selective Huisgen-type [3 + 2] cycloaddition, COA of Formula: C9H12O, the publication is Chemical Science (2021), 12(4), 1544-1550, database is CAplus and MEDLINE.

A Rh(I)-catalyzed highly stereoselective desymmetrization of 2-alkynylbenzaldehyde-tethered cyclohexadienones triggered by intramol. Huisgen-type [3 + 2] cycloaddition was developed. This method enables convergent construction of complex epoxy-bridged polycyclic ring systems with five contiguous stereocenters with excellent exo-selectivity and broad substrate scope. The highly atom-economical process involves 6-endo-dig cyclization of carbonyl oxygen onto an activated alkyne resulting in a highly reactive metal-benzopyrylium intermediate, which readily undergoes intramol. [3 + 2] annulation/hydration. Asym. induction was also achieved for the first time in Rh(I)-catalyzed 1,3-dipolar cycloaddition using an easily accessible chiral diene as the ligand.

Chemical Science published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, COA of Formula: C9H12O.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Galman, James L. published the artcileOne-Pot Biocatalytic In Vivo Methylation-Hydroamination of Bioderived Lignin Monomers to Generate a Key Precursor to L-DOPA, Category: alcohols-buliding-blocks, the publication is Angewandte Chemie, International Edition (2022), 61(8), e202112855, database is CAplus and MEDLINE.

Electron-rich phenolic substrates can be derived from the depolymerization of lignin feedstocks. Direct biotransformations of the hydroxycinnamic acid monomers obtained can be exploited to produce high-value chems., such as α-amino acids, however the reaction is often hampered by the chem. autoxidation in alk. or harsh reaction media. Regioselective O-methyltransferases (OMTs) are ubiquitous enzymes in natural secondary metabolic pathways utilizing an expensive co-substrate S-adenosyl-L-methionine (SAM) as the methylating reagent altering the physicochem. properties of the hydroxycinnamic acids. In this study, we engineered an OMT to accept a variety of electron-rich phenolic substrates, modified a com. E. coli strain BL21 (DE3) to regenerate SAM in vivo, and combined it with an engineered ammonia lyase to partake in a one-pot, two whole cell enzyme cascade to produce the L-DOPA precursor L-veratrylglycine from lignin-derived ferulic acid.

Angewandte Chemie, International Edition published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, Category: alcohols-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Mushtaq, Umair published the artcileHigh-Yield Production of Deoxygenated Monomers from Kraft Lignin over ZnO-Co/N-CNTs in Water, HPLC of Formula: 645-56-7, the publication is ACS Sustainable Chemistry & Engineering (2021), 9(8), 3232-3245, database is CAplus.

Catalytic conversion of tech. lignin to value-added chems. and fuels is important for realizing economically viable lignocellulosic biomass refineries. The choice of catalysts and solvents is critical for the effective conversion of the tech. lignin to chems. and fuels by the cleavage of the C-C bonds. In this study, catalytic depolymerization and hydrodeoxygenation of Kraft lignin (KL) were investigated over bimetallic ZnO and Co deposited on N-doped carbon nanotubes (ZnO-Co/N-CNTs) in an aqueous medium. The catalytic activity of ZnO-Co/N-CNTs was compared with those of various noble and non-noble metal-based catalysts. Almost complete KL conversion with a very low solid residue yield (5 wt %), a high bio-oil yield (52 wt %), a high degree of deoxygenation (DOD, 59.0%), and a high monomeric yield (12.1 wt %) was achieved over ZnO-Co/N-CNTs at 350°C and 6 h reaction time. The monomers mainly consisted of cyclohexanone and its alkyl-substituted derivatives and alkylated phenols. At 400°C, the monomeric yield and DOD increased to 24.4 wt %and 61.0%, resp. In addition, the produced bio-oil exhibited high-calorific values of 34.3-37.0 MJ kg^-1 because of the high activity of ZnO-Co/N-CNTs for hydrodeoxygenation. ZnO-Co/N-CNTs outperformed most of the metal-supported catalysts including 5 wt % Pd, 5 wt % Ru, 5 wt % Pt, 66 wt % Ni, and CoMo on various supports of activated carbon and alumina. The use of water as the solvent resulted in much higher bio-oil and monomeric yields than those using methanol, iso-Pr alc., and n-hexane (12-37 and 3.2-4.1 wt %, resp.). The high bio-oil and monomeric yields with a high DOD in water make ZnO-Co/N-CNTs highly attractive in the development of an environmentally friendly tech. lignin conversion process.

ACS Sustainable Chemistry & Engineering published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, HPLC of Formula: 645-56-7.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Ohnishi, Ryuhei published the artcileCationic Dirhodium Complexes Bridged by 2-Phosphinopyridines Having an Exquisitely Positioned Axial Shielding Group: A Molecular Design for Enhancing the Catalytic Activity of the Dirhodium Core, Formula: C9H12O, the publication is Organometallics (2021), 40(15), 2678-2690, database is CAplus.

This report describes a strategy to create highly electrophilic dirhodium catalysts. The electrophilicity of lantern-type dirhodium complexes is generally decreased by the coordination of a ligand to the axial site, which often causes a reduction in the catalytic activity. The authors designed and synthesized cationic dirhodium complexes bridged by 2-diarylphosphinopyridines having a bulky 2,4,6-triisopropylphenyl (Tip) group that can prevent the attack of external mols. to the closest axial site. Theor. calculations indicated that the Tip group weakly interacts with the axial site but hardly reduces the electrophilicity of the dirhodium core. The complexes served as excellent catalyst precursors for the dehydrogenative silylation of alcs. using hydrosilanes under mild conditions and a low metal loading, producing the silyl ethers in higher yields in comparison to conventional dirhodium complexes.

Organometallics published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, Formula: C9H12O.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Munakala, Anandarao published the artcileSteric and Electronic Control Intramolecular [2 + 2]-Cycloaddition of Cyclohexadienone-Containing 1,7-Enynes, Category: alcohols-buliding-blocks, the publication is Organic Letters (2022), 24(3), 892-896, database is CAplus and MEDLINE.

Herein, authors have developed silver-catalyzed an electronic and steric control intramol. formal [2 + 2]-cycloaddition of alkyne-tethered cyclohexadienones. Substrates with electron-rich alkynes and less hindered quaternary carbon center afford tricyclic fused-cyclobutenes through 1,7-enyne cyclization. In contrast, the formation of dihydrofurans was observed from electron-deficient alkynes via proton abstraction/C-O bond cleavage. The synthetic potential of this method was also broadened with a gram-scale reaction and various transformations on cyclobutene.

Organic Letters published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, Category: alcohols-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Su, Xinluona published the artcileDiffusion of phenolic compounds within high-silica MFI-type zeolite in the mesitylene solution, Category: alcohols-buliding-blocks, the publication is Microporous and Mesoporous Materials (2021), 111044, database is CAplus.

The intracrystalline diffusivity of phenolic compounds (phenol, p-propylphenol and m-cresol) and toluene within silicalite-1 and MFI-type zeolite with Si/Al = 303 (H-MFI) in the liquid phase (solvent: mesitylene) in the temperature range from 313 to 353 K were measured by using the constant volumetric method. The amounts of phenol, p-propylphenol, and toluene adsorbed onto silicalite-1 at 313, 323 and 353 K were approx. the same, whereas less m-cresol was adsorbed because of its larger kinetic diameter Unlike adsorbed toluene, adsorbed of phenol displayed stronger interactions in H-MFI than in silicalite-1, indicating that hydrogen bonding between the OH group of phenol and Bronsted acid sites in H-MFI enhanced the adsorption of phenol. Whereas the intracrystalline diffusivity of phenol, p-propylphenol, and toluene within silicalite-1 are approx. the same, m-cresol exhibited lower intracrystalline diffusivity, indicating that the intracrystalline diffusivity was governed by geometrical limitation. The intracrystalline diffusivity of phenol was lower within H-MFI with acid sites than within silicalite-1. The residence time of phenol on the acid sites became longer than that of toluene, which led to a difference in the intracrystalline diffusivity between phenol and toluene within H-MFI.

Microporous and Mesoporous Materials published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C20H17FO4S, Category: alcohols-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts

Park, Jaeyong published the artcileTotal chemocatalytic cascade conversion of lignocellulosic biomass into biochemicals, Recommanded Product: 4-Propylphenol, the publication is Applied Catalysis, B: Environmental (2022), 121280, database is CAplus.

Because of its complexity, selective conversion of lignocellulosic biomass into platform chems. presents significant challenges. Herein, we converted birch wood into high-yield lignin-derived phenolic monomers and dimers and holocellulose-derived polyols and monocarboxylic acids via a two-step cascade reaction using 0.1 wt% Pd on N-doped carbon (Pd_0.1/CN_x) and passivated alumina-coated Ni on activated carbon (Ni₂ @Al₂O₃/AC) catalysts. The catalytic fractionation of birch sawdust using Pd_0.1/CN_x produced 11.1 wt% monomers, 5.6% dimers, and 63.4 wt% pulp-rich solid (PRS) based on feed weight The subsequent conversion of PRS over passivated Ni₂ @Al₂O₃/AC produced 21.6 wt% C₂-C₆ polyols and 7.9 wt% monocarboxylic acids. After the whole biomass conversion reaction, the Pd_0.1/CN_x and Ni₂ @Al₂O₃/AC catalysts were separated using their different magnetic responses and reused three times without activity loss. The structure-performance relationships of the Pd_0.1/CN_x catalysts synthesized using different methods and effect of passivation on the performance of the Ni₂ @Al₂O₃/AC catalyst were analyzed.

Applied Catalysis, B: Environmental published new progress about 645-56-7. 645-56-7 belongs to alcohols-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 4-Propylphenol, and the molecular formula is C9H12O, Recommanded Product: 4-Propylphenol.

Referemce:
https://en.wikipedia.org/wiki/Alcohol,
Alcohols – Chemistry LibreTexts