Tag: M.W=150-200

Gaaffar, I. F. published the artcileComparison of identified compounds from extracted Pelargonium Radula leaves by supercritical fluid extraction and commercial geranium essential oil, COA of Formula: C9H10O2, the main research area is geranium essential oil supercritical fluid extraction Pelargonium Radula leave.

Supercritical fluid extraction (SFE) is a green technol. that is convenient to extract Pelargonium radula (P. radula) leaves without leaving any neg. impacts on the environment. It is an alternative approach to reduce the solvent residual problem during the extraction process. Therefore, this research was performed to compare the active ingredients extracted by SFE technique with the commercialized geranium essential oil in the market. Extraction of powd. P. radula leaves by supercritical carbon dioxide (SC-CO2) was operated at constant pressure, temperature, and solvent flowrate which were 100 bar, 40°C, and 24 mL/min, resp. SC-CO2 extraction on P. radula leaves result in 0.19% of oil yield. By comparing extracted P. radula oil with the commercialized geranium essential oil, both oil consists of benzyl acetate, citronellol, geraniol, e-amyl cinnamaldehyde, iso-Pr tetradecanoate, and iso-Pr hexadecanoate.

IOP Conference Series: Materials Science and Engineering published new progress about Essential oils 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, COA of Formula: C9H10O2.

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

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

Feng, Xuanyu published the artcileAluminum Hydroxide Secondary Building Units in a Metal-Organic Framework Support Earth-Abundant Metal Catalysts for Broad-Scope Organic Transformations, Application In Synthesis of 111-11-5, the main research area is metal organic framework catalyst organic transformation.

The intrinsic heterogeneity of alumina (Al2O3) surface presents a challenge for the development of alumina-supported single-site heterogeneous catalysts and hinders the characterization of catalytic species at the mol. level as well as the elucidation of mechanistic details of the catalytic reactions. Here we report the use of aluminum hydroxide secondary building units (SBUs) in the MIL-53(Al) metal-organic framework (MOF) with the formula Al(μ2-OH)(BDC) (BDC = 1,4-benzenedicarboxylate) as a uniform and structurally defined functional mimic of Al2O3 surface for supporting Earth-abundant metal (EAM) catalysts. The μ2-OH groups in MIL-53(Al) SBUs were readily deprotonated and metalated with CoCl2 and FeCl2 to afford MIL-53(Al)-CoCl and MIL-53(Al)-FeCl precatalysts which were characterized by powder X-ray diffraction, nitrogen sorption, elemental anal., d. functional theory, and extended X-ray fine structure spectroscopy. Activation with NaBEt3H converted MIL-53(Al)-CoCl to MIL-53(Al)-CoH which effectively catalyzed hydroboration of alkynes and nitriles and hydrosilylation of esters. XPS and X-ray absorption near-edge spectroscopy (XANES) indicated the presence of AlIII and CoII centers in MIL-53(Al)-CoH while deuterium labeling studies suggested σ-bond metathesis as a key step for the MIL-53(Al)-CoH-catalyzed addition reactions. MIL-53(Al)-FeCl competently catalyzed oxidative Csp3-H amination and Wacker-type alkene oxidation XANES anal. revealed the oxidation of FeII to FeIII centers in the activated MIL-53(Al)-FeCl catalyst and suggested that oxidative Csp3-H amination occurs via the formation of FeIII-OtBu species by single electron transfer between FeII centers in MIL-53(Al)-FeCl and (tBuO)2 with concomitant generation of 1 equiv of tBuO· radical, C-H activation through hydrogen atom abstraction to generate alkyl radicals, protonation of FeIII-OtBu by aniline to generate MIL-53(Al)-FeIII-anilide, and finally C-N coupling between the FeIII-anilide and alkyl radical to form the Csp3-H amination product and regenerate the FeII catalyst. These highly active single-site MOF-based solid catalysts were readily recovered and reused up to five times without significant decrease in catalytic activity. This work thus demonstrates the great potential of using the aluminum hydroxide SBUs in MOFs to support EAM catalysts for important organic transformations.

ACS Catalysis published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, Application In Synthesis of 111-11-5.

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

Feng, Xuanyu published the artcileAluminum Hydroxide Secondary Building Units in a Metal-Organic Framework Support Earth-Abundant Metal Catalysts for Broad-Scope Organic Transformations, Application In Synthesis of 140-11-4, the main research area is metal organic framework catalyst organic transformation.

The intrinsic heterogeneity of alumina (Al2O3) surface presents a challenge for the development of alumina-supported single-site heterogeneous catalysts and hinders the characterization of catalytic species at the mol. level as well as the elucidation of mechanistic details of the catalytic reactions. Here we report the use of aluminum hydroxide secondary building units (SBUs) in the MIL-53(Al) metal-organic framework (MOF) with the formula Al(μ2-OH)(BDC) (BDC = 1,4-benzenedicarboxylate) as a uniform and structurally defined functional mimic of Al2O3 surface for supporting Earth-abundant metal (EAM) catalysts. The μ2-OH groups in MIL-53(Al) SBUs were readily deprotonated and metalated with CoCl2 and FeCl2 to afford MIL-53(Al)-CoCl and MIL-53(Al)-FeCl precatalysts which were characterized by powder X-ray diffraction, nitrogen sorption, elemental anal., d. functional theory, and extended X-ray fine structure spectroscopy. Activation with NaBEt3H converted MIL-53(Al)-CoCl to MIL-53(Al)-CoH which effectively catalyzed hydroboration of alkynes and nitriles and hydrosilylation of esters. XPS and X-ray absorption near-edge spectroscopy (XANES) indicated the presence of AlIII and CoII centers in MIL-53(Al)-CoH while deuterium labeling studies suggested σ-bond metathesis as a key step for the MIL-53(Al)-CoH-catalyzed addition reactions. MIL-53(Al)-FeCl competently catalyzed oxidative Csp3-H amination and Wacker-type alkene oxidation XANES anal. revealed the oxidation of FeII to FeIII centers in the activated MIL-53(Al)-FeCl catalyst and suggested that oxidative Csp3-H amination occurs via the formation of FeIII-OtBu species by single electron transfer between FeII centers in MIL-53(Al)-FeCl and (tBuO)2 with concomitant generation of 1 equiv of tBuO· radical, C-H activation through hydrogen atom abstraction to generate alkyl radicals, protonation of FeIII-OtBu by aniline to generate MIL-53(Al)-FeIII-anilide, and finally C-N coupling between the FeIII-anilide and alkyl radical to form the Csp3-H amination product and regenerate the FeII catalyst. These highly active single-site MOF-based solid catalysts were readily recovered and reused up to five times without significant decrease in catalytic activity. This work thus demonstrates the great potential of using the aluminum hydroxide SBUs in MOFs to support EAM catalysts for important organic transformations.

ACS Catalysis published new progress about Alcohols 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, Application In Synthesis of 140-11-4.

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

Chiu, Ting-Yu published the artcileA Dinuclear Dysprosium Complex as an Air-Stable and Recyclable Catalyst: Applications in the Deacetylation of Carbohydrate, Aliphatic, and Aromatic Molecules, Recommanded Product: Benzyl acetate, the main research area is dinuclear dysprosium complex catalyst green preparation; alc green preparation chemoselective; ester deacetylation dinuclear dysprosium catalyst; carbohydrates; deacetylation; dysprosium; homogeneous catalysis.

Three dinuclear dysprosium complexes, [Dy2(hmb)2(OTf)2(H2O)4].HOTf.2THF (A.HOTf.2THF), [Dy2(hmb)2(OTf)2(H2O)4].(CH3)2CO (A.(CH3)2CO) and [Dy2(hmi)3(H2O)2].2HOTf (B.2HOTf), were synthesized by the reaction of Dy(OTf)3 and the Schiff-base ligands H2hmb (N’-(2-hydroxy-3-methoxybenzylidene)benzohydrazide) or H2hmi ((2-hydroxy-3-methoxyphenyl)methylene isonicotinohydrazine). Complex A.HOTf.2THF was an effective and chemoselective catalyst for the deacetylation of esters in methanol. This method offered an efficient route to selectively deacetylated monosaccharides and disaccharides in high yields and a green catalyst that can be easily recycled and reused. This method was especially valuable for the preparation of peracetylated hemiacetal of monosaccharides and disaccharides with yields of 85 to 88 and 65 to 85%, resp. Complex (B.2HOTf), in comparison, indicated that coordinated triflate ions were key to activation of the regioselective anomeric deacetylation.

Chemistry – An Asian Journal published new progress about Alcohols 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, Recommanded Product: Benzyl acetate.

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

Yang, Xintuo published the artcilePalladium(II)-Catalyzed Enantioselective Hydrooxygenation of Unactivated Terminal Alkenes, Application In Synthesis of 583-04-0, the main research area is terminal alkene carboxylic acid palladium catalyst enantioselective hydrooxygenation; ester preparation.

A novel Pd(II)-catalyzed enantioselective Markovnikov hydrooxygenation of unactivated terminal alkenes using a substituted pyridinyl oxazoline (Pyox) ligand was developed. Herein it was discovered that the (EtO)2MeSiH/BQ redox system is vital for the highly selective and efficient hydrooxygenation, where the alkylpalladium(II) species generated from enantioselective oxypalladation step was reduced by silane. This method provides efficient access to optically pure alc. esters from easily available alkenes with excellent enantioselectivities and features a broad substrate scope.

Journal of the American Chemical Society published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 583-04-0 belongs to class esters-buliding-blocks, name is Allyl benzoate, and the molecular formula is C10H10O2, Application In Synthesis of 583-04-0.

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

Sousa, Sara C. A. published the artcileBench-Stable Manganese NHC Complexes for the Selective Reduction of Esters to Alcohols with Silanes, HPLC of Formula: 111-11-5, the main research area is alc preparation chemoselective; ester reduction manganese catalyst.

Selective reduction of esters to alcs. RCH2OH [R = cyclohexyl, Ph, 4-ClC6H4, etc.] was accomplished through Mn(I)-mediated hydrosilylation reaction. The manganese tricarbonyl complex [Mn(bis-NHC)(CO)3Br] resulted an active pre-catalyst for the reduction of a variety of esters using phenylsilane and the cheap and readily available polymethylhydrosiloxane.

Advanced Synthesis & Catalysis published new progress about Alcohols Role: SPN (Synthetic Preparation), PREP (Preparation). 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, HPLC of Formula: 111-11-5.

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

Yasukouchi, Hiroaki published the artcileEfficient and Practical Deacylation Reaction System in a Continuous Packed-Bed Reactor, Recommanded Product: Benzyl acetate, the main research area is alc preparation; chemoselective deacylation ester packed bed reactor ion exchange resin; ion exchange resin catalyst deacylation ester packed bed reactor.

Esters such as benzyl acetate underwent deacylation using a packed-bed reactor containing the ion-exchange resins DIAION 306 and DIAION PA 308 (after anion exchange with sodium hydroxide or methoxide) in flow to yield alcs.; the flow process offers improved isolability and yields over the comparable batch process. The deacylation reaction was used for hydrolysis of intermediates towards efinaconazole and atorvastatin.

Organic Process Research & Development published new progress about Alcohols 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, Recommanded Product: Benzyl acetate.

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

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