Esters-buliding-blocks

Wu, Kejing published the artcileHierarchical meso- and macroporous carbon from lignin for kraft lignin decomposition to aromatic monomers, Product Details of C10H20O2, the main research area is hierarchical mesomacroporous carbon lignin kraft decomposition aromatic monomer.

In this study, lignosulfonate is converted to hierarchical carbon materials via templating methods, which are used as supports of molybdenum carbide catalysts for Kraft lignin decomposition to aromatic monomers. The results show that hierarchical carbon materials with micropores, mesopores of about 8 nm, and macropores of about 400 nm are obtained from calcium and sodium lignosulfonates using coupled SiO2+F127 templates with high ash-free carbon yields of about 50%. The F127 template tends to assemble on SiO2 surface along with radial direction to form ordered meso-/macroporous structure of the carbon materials. The β-Mo2C supported on the hierarchical carbon material exhibits high catalytic performance with aromatic yield of 0.586 g/g Kraft lignin, and the BTX (benzene, toluene, and xylene) components and BTX-derived alcs. donate 21% and 32% of the aromatics, resp. The mesopores benefit the accessibility of lignin fragments to active sites and interconnection between macropores, and the macropores enhance the impregnation of highly-dispersed nano β-Mo2C particles into pore structures. The hierarchical carbon materials from pulping waste lignin shows potential for macromol. lignin decomposition

Catalysis Today published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Product Details of C10H20O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Figliolia, Rosario published the artcileCNN pincer ruthenium complexes for efficient transfer hydrogenation of biomass-derived carbonyl compounds, Synthetic Route of 539-88-8, the main research area is ruthenium pincer CNN aryl pyridinemethanamine phosphine carbonyl complex preparation; transfer hydrogenation catalyst ketone aldehyde pincer CNN pyridinemethanamine complex; alc preparation transfer hydrogenation cellulose lignin derived aldehyde ketone.

The ligand HCNNOMe [6-(4-methoxyphenyl)-2-pyridinemethanamine, H2NCH2pyC6H4OMe, py = 2,6-pyridinediyl] is easily prepared by Pd/C-catalyzed reductive amination of the com. available 6-(4-methoxyphenyl)-2-pyridinecarboxaldehyde (H2, 1 atm). The pincer complexes cis-[RuCl(H2NCH2pyC6H3OMe)(PPh3)2] (1) and [RuCl(H2NCH2pyC6H3OMe)(PP)] (2, PP = dppb; 3, PP = dppf) are synthesized from [RuCl2(PPh3)3], H2NCH2pyC6H4OMe and dppb or dppf in 2-propanol with NEt3 at reflux and are isolated in 85-93% yield. Carbonylation of 1 (CO, 1 atm) gives [RuCl(H2NCH2pyC6H3OMe)(CO)(PPh3)] (4) (79% yield) which cleanly reacts with Na[BArf4] and PCy3, affording the cationic trans-[Ru(H2NCH2pyC6H3OMe)(CO)(PCy3)(PPh3)][BArF4] (5) (92% yield). These robust pincer complexes display remarkably high catalytic activity in the transfer hydrogenation (TH) of lignocellulosic biomass carbonyl compounds, using 2-propanol at reflux in a basic medium (NaOiPr or K2CO3). Thus, furfural, 5-(hydroxymethyl)furfural and cyrene are reduced to the corresponding alcs. with 2 and 3, at S/C in the range of 10 000-100 000, within minutes or hours (TOF up to 1 500 000 h-1). The monocarbonyl complex 5 was found to be extremely active in the TH of cinnamaldehyde, vanillin derivatives and Et levulinate at S/C in the range of 10 000-50 000. Vanillyl alc. is also obtained by the TH of vanillin with 5 (S/C = 500) in 2-propanol in the presence of K2CO3.

Dalton Transactions published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Synthetic Route of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Sole, Roberto published the artcileSynthesis of 2-Alkylaryl and Furanyl Acetates by Palladium Catalysed Carbonylation of Alcohols, COA of Formula: C9H10O2, the main research area is aralkyl alc methanol carbon monoxide palladium catalyst methoxycarbonylation; alkylaryl acetate preparation.

In this paper, the reaction between benzyl alc., chosen as a model substrate, CH3OH and CO was tested in the presence of a homogeneous palladium catalyst, an activator (isopropenyl acetate (IPAc) or di-Me carbonate (DMC)) and a base (Cs2CO3). The influence of various reaction parameters such as the CO pressure, ligand and palladium precursor employed, mmol% catalyst load, temperature and time were investigated. The results demonstrate that decreasing the CO pressure from 50 bar to 5 bar at 130°C for 18 h increases yields in benzyl acetate from 36% to over 98%. Further experiments were performed in the presence of piperonyl and furfuryl alc., interesting substrates employed for the synthesis of various fine chems. Moreover, furfuryl alc. is a lignocellulosic-derived building block employed for the synthesis of functionalized furans such as 2-alkylfurfuryl acetates. Both the alcs. were successfully transformed in the corresponding acetate (yields above 96%) in rather mild reaction conditions (5-0.01 mol% catalyst, 5-2 bar CO pressure, 130°C, 4-18h), demonstrating that the alkoxycarbonylation of alcs. represents a promising sustainable alternative to more impactful industrial practices adopted to date for the synthesis of alkylaryl and furfuryl acetates.

Catalysts published new progress about Acetates Role: SPN (Synthetic Preparation), PREP (Preparation). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, COA of Formula: C9H10O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Li, Bin-Shi published the artcileRh(III)-Catalyzed three-component C-H functionalization reaction with vinylene carbonate: Late-stage C-H esterification of indole derivatives, Application In Synthesis of 623-50-7, the main research area is azaarenylindole vinylene carbonate alc rhodium tandem three component esterification; indolyl acetate preparation regioselective.

An efficient and robust Rh(III)-catalyzed three-component C-H esterification reaction of indole derivatives with vinylene carbonate to access indolyl acetates was developed. This protocol exhibited high efficiency, good yields and excellent functional group tolerance. Significantly, this method provided a powerful approach for the late-stage modification of indole-based substrates and natural alcs.

Tetrahedron Letters published new progress about Acetates Role: SPN (Synthetic Preparation), PREP (Preparation). 623-50-7 belongs to class esters-buliding-blocks, name is Ethyl 2-hydroxyacetate, and the molecular formula is C4H8O3, Application In Synthesis of 623-50-7.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

James, Reuben R. published the artcileOne-Pot Reductive Acetylation of Aldehydes using 1-Hydrosilatrane in Acetic Acid, Category: esters-buliding-blocks, the main research area is acetate one pot preparation aldehyde reductive acetylation hydrosilatrane mediator.

A one-pot, direct reductive acetylation of aldehydes was achieved under mild conditions using 1-hydrosilatrane as a safe and easily accessible catalyst. Described herein is a facile synthesis that produces acylated primary alcs. that can serve as valuable building blocks for organic synthesis. The method has good functional group tolerance and works for a range of aryl aldehydes, with the notable exception of electron-rich arenes. A library of esters was isolated by flash chromatog. in yields as high as 92%.

SynOpen published new progress about Acetates Role: SPN (Synthetic Preparation), PREP (Preparation). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Category: esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Jain, Isha published the artcileManganese-mediated acetylation of alcohols, phenols, thiols, and amines utilizing acetic anhydride, Computed Properties of 140-11-4, the main research area is acetate preparation green chem solventless; aliphatic alc acetic anhydride acetylation manganese catalyst; phenol acetic anhydride acetylation manganese catalyst; thiophenol acetic anhydride acetylation manganese catalyst; aniline acetic anhydride acetylation manganese catalyst.

Manganese(II) chloride-catalyzed acetylation of alcs., phenols, thiols and amines RXH (R = Ph, n-octyl, cyclohexyl, etc.; X = O, S, NH), morpholine with acetic anhydride is reported. This method is environment-friendly and economically viable as it involves inexpensive, relatively benign catalyst, mild reaction condition, and simple workup. Acetylation is performed under the solvent-free condition at ambient temperature and acetylated products RXAc, N-acetylmorpholine obtained in good to excellent yields. Primary, secondary heterocyclic amines, and phenols with various functional groups are smoothly acetylated in good yields. This method exhibits exquisite chemoselectivity, and the amino group is preferentially acetylated in the presence of a hydroxyl/thiol group.

Synthetic Communications published new progress about Acetates Role: SPN (Synthetic Preparation), PREP (Preparation). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Computed Properties of 140-11-4.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Ma, Xiuyuan published the artcileMnO2 oxidative degradation of lignin and electrochemical recovery study, Computed Properties of 140-11-4, the main research area is lignin manganese dioxide oxidative degradation electrochem recovery.

Effective degradation of lignin and further production of small-mol. aromatic chems. are of great importance in sustainable chem. In this experiment, lignin was efficiently oxidatively degraded under mild conditions using inexpensive manganese dioxide rather than a precious metal catalyst, with a lignin degradation efficiency of 66%. A double electrolytic cell system was then used to achieve the recycling of manganese dioxide at the anode while producing hydrogen at the cathode. GC-MC anal. showed that the lignin was degraded to chems. containing small aromatic mols. such as benzoic acid and benzyl acetate. This experiment provides a new pathway for the cyclic degradation of lignin.

Polymer Degradation and Stability published new progress about Aromatic compounds Role: ANT (Analyte), ANST (Analytical Study). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Computed Properties of 140-11-4.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Aragon-Garcia, Fatima published the artcileChanges in the Aromatic Compounds Content in the Muscat Wines as a Result of the Application of Ultrasound during Pre-Fermentative Maceration, Synthetic Route of 106-32-1, the main research area is aromatic compound ultrasound prefermentative maceration wine; aroma; muscat; pre-fermentative maceration; ultrasound; wine.

This research focuses on the aromatic composition of Muscat of Alexandria wines after the application of ultrasound for 40 or 80 min during a 4 h pre-fermentative maceration process. Two methods of ultrasound application were compared in this study: probe ultrasound and bath ultrasound, for periods of 10-20 min per h. Increases of more than 200% were obtained for some of the compounds from the skins, such as two of its terpenes, citronellol and nerol. On the other hand, increases in alc. and ester values were registered with the application of ultrasound for 40 min. However, a significant decrease in these compounds was recorded when the ultrasound process was extended. In fact, when ultrasound was applied for 80 min, content values were even lower than those registered for the wine produced without the application of ultrasound. At the sensory level, the effect resulting from probe and bath ultrasound application for different times were compared, where most of the judges successfully discriminated the wines resulting from the application of ultrasound bath. According to data, the wines resulting from the application of ultrasound bath for 80 min presented the most significant differences, which affected the aromas of white fruit, tropical fruit, stone fruit, flowers and citrus.

Foods published new progress about Aromatic compounds Role: ANT (Analyte), ANST (Analytical Study). 106-32-1 belongs to class esters-buliding-blocks, name is Ethyl octanoate, and the molecular formula is C10H20O2, Synthetic Route of 106-32-1.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Li, S. published the artcileExploring the regional typicality of Australian Shiraz wines using untargeted metabolomics, Recommanded Product: Benzyl acetate, the main research area is Shiraz wine regionality volatile compound untargeted metabolomics.

Shiraz is the most widely planted winegrape cultivar in Australia. Sensory studies have indicated that different grapegrowing regions in Australia produce distinct styles of Shiraz wines that differ in flavor characteristics. The current project aimed to characterize the underlying volatile composition associated with regional Shiraz wine styles. Wines were selected from six geog. distinct regions and the volatile compounds were analyzed using gas chromatog. time-of-flight mass spectrometry to provide a comprehensive and holistic overview of the wine volatilome. A suite of R language based software enabled feature extraction and importance ranking, following an untargeted metabolomics approach. A classification model based on the random forests algorithm using the 80 most important compounds correctly associated all samples to regions. A range of these compounds, including terpenoids, benzenoids, esters, furan derivatives and aliphatic alcs., has been associated with grape composition, winemaking influences and the ageing process. The results suggest that the regional compositional differences in varietal wines may be influenced by all processes in the entire wine production chain. The current study highlighted the chem. basis underlying the regional typicality of Australian Shiraz wines, and identified specific volatile compounds that may be associated with a region.

Australian Journal of Grape and Wine Research published new progress about Aliphatic alcohols Role: ANT (Analyte), ANST (Analytical Study). 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Recommanded Product: Benzyl acetate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Itoh, Akichika published the artcileOxidative photo-decarboxylation in the presence of mesoporous silicas, Application of tert-Butyl acetylcarbamate, the main research area is carbonyl compound preparation; mesoporous silica catalyst oxidative photodecarboxylation carboxylic acid.

FSM-16, a mesoporous silica, was found to catalyze oxidative photo-decarboxylation of α-hydroxy carboxylic acid, phenylacetic acid derivatives, and N-acyl-protected α-amino acids to afford the corresponding carbonyl compounds Furthermore, FSM-16 proved to be re-usable by re-calcination at 450°C after the reaction.

Chemical & Pharmaceutical Bulletin published new progress about Aldehydes Role: SPN (Synthetic Preparation), PREP (Preparation). 120157-98-4 belongs to class esters-buliding-blocks, name is tert-Butyl acetylcarbamate, and the molecular formula is C7H13NO3, Application of tert-Butyl acetylcarbamate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics