Esters-buliding-blocks

Tang, Bo published the artcileA β-cyclodextrin covalent organic framework used as a chiral stationary phase for chiral separation in gas chromatography, Product Details of C11H22O2, the main research area is cyclodextrin covalent organic framework chiral stationary phase gas chromatog.

Chiral covalent organic frameworks (CCOFs) featuring chirality, stability, and good porosity have attracted a considerable amount of attention due to their important applications, such as asym. catalysis, chiral separation, and chiral recognition. In this study, a β-cyclodextrin (β-CD) covalent organic framework (β-CD-COF) diluted with polysiloxane OV-1701 was explored as a novel chiral stationary phase (CSP) for gas chromatog. (GC) separation of racemates. The β-CD-COF coated capillary column had excellent selectivity, not only for the separation of linear alkanes, linear alcs., fatty acid Me esters mixture, the Grob mixture and positional isomers, but also for the resolution of chiral compounds, including chiral alcs., aldehydes, ethers, and amino acid derivatives In addition, the β-CD-COF-coated capillary column presented good repeatability and reproducibility. This work indicated the great potential of the CCOFs coated capillary column for the chromatog. separation of enantiomers.

Chinese Chemical Letters published new progress about Alcohols, chiral Role: ANT (Analyte), ANST (Analytical Study). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Product Details of C11H22O2.

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

Bernardo, Joana R. published the artcileHReO4 as highly efficient and selective catalyst for the conversion of carbohydrates into value added chemicals, Computed Properties of 539-88-8, the main research area is HReO4 catalyst carbohydrate conversion.

This work describes the first catalyst (HReO4) that promotes the efficient and selective conversion of several carbohydrates into four compounds, Et levulinate (EL), 5-ethoxymethylfurfural (EMF), 5-hydroxymethylfurfural (HMF) and levulinic acid (LA), through a one-pot reaction strategy adjusting the reaction conditions. The reaction of fructose in ethanol at 160 °C gave EL in 80% yield after 16 h and in a mixture of ethanol/THF at 140 °C produced EMF in 73% yield after 1 h. HMF and LA can also be obtained selectively with 100% yield from fructose at 140 °C after 1 h, in DMSO or 1,4-dioxane, resp. EL, HMF, LA and EMF were also produced in moderate to good yields from other carbohydrates such as inulin and sucrose. The catalyst HReO4 can be used in gram scale for the production of EL, EMF, HMF and LA with good yields and in at least 8 catalytic cycles on the conversion of fructose into EL with no significant reduction in its activity.

Molecular Catalysis published new progress about Carbohydrates Role: RCT (Reactant), RACT (Reactant or Reagent). 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Computed Properties of 539-88-8.

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

Olivier, Wesley J. published the artcileBronsted acid-mediated annulations of pyrroles featuring N-tethered α,β-unsaturated ketones and esters: Total syntheses of (±)-tashiromine and (±)-indolizidine 209I, Quality Control of 10047-10-6, the main research area is tashiromine total synthesis pyrrole Bronsted acid mediated annulation; indolizidine 209I total synthesis pyrrole Bronsted acid mediated annulation.

This study provides the first report of the construction of tetrahydroindolizines and tetrahydropyrrolo[1,2-a]azepines via Bronsted acid-mediated annulation of pyrroles featuring N-tethered α,β-unsaturated esters. In addition, the Bronsted acid-catalyzed cyclization of pyrroles featuring pendant α,β-unsaturated ketones was applied to complete total syntheses of the indolizidine alkaloids (±)-tashiromine (I) and (±)-indolizidine 209I (II).

Tetrahedron published new progress about Bronsted acids Role: RGT (Reagent), RACT (Reactant or Reagent). 10047-10-6 belongs to class esters-buliding-blocks, name is Methyl 2-aminopentanoate hydrochloride, and the molecular formula is C6H14ClNO2, Quality Control of 10047-10-6.

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

Zhang, Yihan published the artcileZinc-triggered photocatalytic selective synthesis of benzyl acetate on inverse spinel CuFe2O4 3D networks: a case of coupled redox photocatalytic reaction, Category: esters-buliding-blocks, the main research area is benzyl acetate preparation DFT; benzaldehyde zinc triggered copper iron oxide photocatalyst coupled redox.

Herein, a Zn-doped CuFe2O4 3D network for the coupled redox photocatalytic (CRP) reaction to generate benzyl acetates I [R = Ph, 4-MeC6H4, 4-ClC6H4, etc.] with high selectivity was developed. The ammonia assisted sol-gel method helped to improve the sp. surface area of inverse spinel CuFe2O4 and therefore the concentration of oxygen vacancies. With an optimized doping content of 0.5%, Zn-doped CuFe2O4 presented a photocurrent as high as 34.72μA cm-2, which indicated that Zn-doping largely boosted the charge separation efficiency in accordance with the surface photovoltage measurement. Most importantly, in the CRP reaction, zinc triggered the selectivity of benzaldehyde to benzyl acetate from 2.97% to 74.80%. D. functional theory (DFT) calculations further revealed that zinc doping enhanced the adsorption energy of the intermediate product of acetone in CuFe2O4-based CRP reaction leading to enhanced activity and selectivity.

Materials Advances published new progress about Benzaldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 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

Wang, Xin published the artcileSystematic study of the material, structure and lacquering techniques of lacquered wooden coffins from the Eastern Regius Tombs of the Qing Dynasty, China, Formula: C23H46O2, the main research area is mercury sulfide lacquered wooden coffin lacquering pigment.

This paper presents a series of detailed anal. results from lacquered wooden coffins of Emperor Qianlong’s concubines (Huixian, Shujia) and second empress (Wulanala) excavated from the Eastern Regius Tombs of the Qing Dynasty, China. The anal. is focused on the materials used in the lacquered wooden coffins, specifically investigating the pigments, lacquers, organic additives and lacquering techniques using digital microscopy, SEM-EDS, XRD, micro-Raman spectroscopy, FT-IR and THM-Py-GC/MS. The results demonstrate that the mineral pigments were mainly HgS, As2S3, the golden area in the lacquer film layers mainly contained elements Au and Ag, the lacquer ash layers mainly included several layers of stucco and fiber layers arranged alternately, the lacquer sap was urushi, and heat-bodied tung oil was also present in the lacquer. Furthermore, several kinds of lacquering techniques, which demonstrated traditional Chinese lacquering and the rigid hierarchy of funerals in feudal dynasties, are also identified in this investigation.

Microchemical Journal published new progress about Attenuated-total-reflectance Fourier-transform IR spectroscopy. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Formula: C23H46O2.

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

Wang, Xin published the artcileSystematic study of the material, structure and lacquering techniques of lacquered wooden coffins from the Eastern Regius Tombs of the Qing Dynasty, China, SDS of cas: 111-11-5, the main research area is mercury sulfide lacquered wooden coffin lacquering pigment.

This paper presents a series of detailed anal. results from lacquered wooden coffins of Emperor Qianlong’s concubines (Huixian, Shujia) and second empress (Wulanala) excavated from the Eastern Regius Tombs of the Qing Dynasty, China. The anal. is focused on the materials used in the lacquered wooden coffins, specifically investigating the pigments, lacquers, organic additives and lacquering techniques using digital microscopy, SEM-EDS, XRD, micro-Raman spectroscopy, FT-IR and THM-Py-GC/MS. The results demonstrate that the mineral pigments were mainly HgS, As2S3, the golden area in the lacquer film layers mainly contained elements Au and Ag, the lacquer ash layers mainly included several layers of stucco and fiber layers arranged alternately, the lacquer sap was urushi, and heat-bodied tung oil was also present in the lacquer. Furthermore, several kinds of lacquering techniques, which demonstrated traditional Chinese lacquering and the rigid hierarchy of funerals in feudal dynasties, are also identified in this investigation.

Microchemical Journal published new progress about Attenuated-total-reflectance Fourier-transform IR spectroscopy. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, SDS of cas: 111-11-5.

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

Wang, Xin published the artcileSystematic study of the material, structure and lacquering techniques of lacquered wooden coffins from the Eastern Regius Tombs of the Qing Dynasty, China, Product Details of C11H22O2, the main research area is mercury sulfide lacquered wooden coffin lacquering pigment.

This paper presents a series of detailed anal. results from lacquered wooden coffins of Emperor Qianlong’s concubines (Huixian, Shujia) and second empress (Wulanala) excavated from the Eastern Regius Tombs of the Qing Dynasty, China. The anal. is focused on the materials used in the lacquered wooden coffins, specifically investigating the pigments, lacquers, organic additives and lacquering techniques using digital microscopy, SEM-EDS, XRD, micro-Raman spectroscopy, FT-IR and THM-Py-GC/MS. The results demonstrate that the mineral pigments were mainly HgS, As2S3, the golden area in the lacquer film layers mainly contained elements Au and Ag, the lacquer ash layers mainly included several layers of stucco and fiber layers arranged alternately, the lacquer sap was urushi, and heat-bodied tung oil was also present in the lacquer. Furthermore, several kinds of lacquering techniques, which demonstrated traditional Chinese lacquering and the rigid hierarchy of funerals in feudal dynasties, are also identified in this investigation.

Microchemical Journal published new progress about Attenuated-total-reflectance Fourier-transform IR spectroscopy. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Product Details of C11H22O2.

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

Kumaravel, Sakthivel published the artcileRu/TiO2 nanostructured catalysts: synthesis, characterization and catalytic activity towards hydrogenation of ethyl levulinate, Product Details of C7H12O3, the main research area is ruthenium titania ethyl levulinate catalyst hydrogenation nanostructure.

Pristine TiO2 and x% Ru/TiO2 catalysts with different weight% of Ru (x%= 1.5%, 2%, 2.5% and 3%) were synthesized using sol-gel and simple impregnation methods. Different characterization techniques such as X-ray diffraction (XRD), Fourier transform IR spectroscopy (FT-IR), SEM (SEM), High-resolution transmission electron microscope (HR-TEM), Inductively coupled plasma-optical emission spectrometry (ICP-OES) and Thermogravimetry/DTA (TG/DTA) were used to study the physicochem. and morphol. properties. The XRD patterns of the as-prepared pristine TiO2 catalyst showed high crystalline nature. The HR-TEM images revealed that the Ru nanoparticles (NPs) were evenly dispersed on the TiO2 surface. The prepared catalysts were evaluated for their catalytic activity towards the liquid phase hydrogenation of Et levulinate under mild reaction conditions (ambient H2 pressure). Among the various catalysts, 2.5% Ru/TiO2 catalyst showed the maximum catalytic activity of 79% Et levulinate (EL) conversion with 82% selectivity of γ-valerolactone (GVL). The recyclability test revealed that the most active 2.5% Ru/TiO2 also showed the highest stability of the catalyst under optimized exptl. conditions.

Journal of Nanoscience and Nanotechnology published new progress about Attenuated-total-reflectance Fourier-transform IR spectroscopy. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Product Details of C7H12O3.

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

Li, Yiming published the artcileVisible-light-promoted oxidative halogenation of alkynes, Synthetic Route of 914943-91-2, the main research area is alkyne oxidative halogenation visible light.

In nature, halogenation promotes the biol. activity of secondary metabolites, especially geminal dihalogenation. Related natural mols. were studied for decades. In recent years, their diversified vital activities were explored for treating various diseases, which call for efficient and divergent synthetic strategies to facilitate drug discovery. Here the authors report a catalyst-free oxidative halogenation achieved under ambient conditions (halide ion, air, water, visible light, room temperature, and normal pressure). Constitutionally, electron transfer between the oxygen and halide ion is shuttled via simple conjugated mols., in which phenylacetylene works as both reactant and catalyst. Synthetically, it provides a highly compatible late-stage transformation strategy to build up dihaloacetophenones (DHAPs).

Chemical Communications (Cambridge, United Kingdom) published new progress about Alkynes, aryl Role: RCT (Reactant), RACT (Reactant or Reagent). 914943-91-2 belongs to class esters-buliding-blocks, name is tert-Butyl 3-ethynylbenzoate, and the molecular formula is C13H14O2, Synthetic Route of 914943-91-2.

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

Chakraborty, Soumi published the artcileRedox-active ligand based Mn(I)-catalyst for hydrosilylative ester reduction, SDS of cas: 110-42-9, the main research area is manganese phenalenyl preparation redox active catalyst; ester hydrosilylation polymethylhydrosiloxane manganese catalyst; alc preparation.

Herein a Mn(I) catalyst bearing a redox-active phenalenyl-based ligand is reported for the efficient hydrosilylation of esters to alcs. using polymethylhydrosiloxane as the inexpensive silane source under mild conditions. Mechanistic investigations suggest a strong ligand-metal cooperation where a ligand-based single electron transfer (SET) process initiates the reaction through Si-H bond activation.

Chemical Communications (Cambridge, United Kingdom) published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, SDS of cas: 110-42-9.

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