Category: 140-11-4

Zhang, Jinglin published the artcileCharacterization of aroma-active compounds in Jasminum sambac concrete by aroma extract dilution analysis and odour activity value, Category: esters-buliding-blocks, the main research area is linalool cis3hexanyl acetate eugenol aroma active compound Jasminum.

Jasminum sambac is a flower and usually used in food, cosmetics or other chem. industries for its unique flavor characteristics in China. However, mol. sensory technologies have not applied to identify aroma-active compounds in J sambac concrete. In this study, gas chromatog.-olfactometry (GC-O), gas chromatog.-mass spectrometry and solvent-assisted flavor evaporation were applied to isolate the odorants in three Chinese J sambac concrete (E1, E2 and E3) obtained from different companies. A total of forty-nine, forty-eight, thirty-nine odorants were screened by GC-O with aroma extract dilution anal. in E1, E2 and E3, resp. The higher flavor dilution (FD) factors were linalool (19 683-59 049, floral), Me anthranilate (6561-19 683, grape-like) and benzyl acetate (2187-19 683, floral). Twenty-two aroma compounds were quantitated by gas chromatog.-flame ionization detection with internal standard, and then their odor activity values were obtained. Linalool, cis-3-hexenyl acetate, linalyl acetate, eugenol and Me salicylate contributed greatly to the aroma of J sambac concretes. The aroma recombination model was established by mixing twenty-two key odorants based on their measured concentrations, and the result revealed that the overall aroma profile was similar to that of the original sample. These results proved basic data for improvement of the national standard of jasmine concrete.

Flavour and Fragrance Journal published new progress about Anesthetics. 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

Rashed, Nurnobi Md. published the artcileDirect Phenolysis Reactions of Unactivated Amides into Phenolic Esters Promoted by a Heterogeneous CeO2 Catalyst, Synthetic Route of 140-11-4, the main research area is phenolic ester preparation solvent free; amide aliphatic aromatic alc direct phenolysis CeO2 catalyst; acid-base cooperation; heterogeneous catalysts; phenolic esters; phenolysis; unactivated amides.

The direct catalytic esterification of amides that leads to the construction of C-O bonds through the cleavage of amide C-N bonds is a highly attractive strategy in organic synthesis. While aliphatic and aromatic alcs. can be readily used for the alcoholysis of activated and unactivated amides, the introduction of phenols is more challenging due to their lower nucleophilicity in the phenolysis of unactivated amides. Herein, phenols can be used for the phenolysis of unactivated amides into the corresponding phenolic esters using a simple heterogenous catalytic system based on CeO2 under additive-free reaction conditions was demonstrated. The method tolerates a broad variety of functional groups (>50 examples) in the substrates. Results of kinetic studies afforded mechanistic insights into the principles governing this reaction, suggesting that the cooperative effects of the acid-base functions of catalysts would be of paramount importance for the efficient progression of the C-N bond breaking process, and consequently, CeO2 showed the best catalytic performance among the catalysts explored.

Chemistry – A European Journal published new progress about Alcoholysis. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Synthetic Route of 140-11-4.

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

Oosthoek-de Vries, Anna Jo published the artcileInline Reaction Monitoring of Amine-Catalyzed Acetylation of Benzyl Alcohol Using a Microfluidic Stripline Nuclear Magnetic Resonance Setup, Recommanded Product: Benzyl acetate, the main research area is amine catalyzed acetylation benzyl alc microfluidic stripline NMR monitoring.

We present an in-depth study of the acetylation of benzyl alc. in the presence of N,N-diisopropylethylamine (DIPEA) by NMR monitoring of the reaction from 1.5 s to several minutes. We have adapted the NMR setup to be compatible to microreactor technol., scaling down the typical sample volume of com. NMR probes (500 μL) to a microfluidic stripline setup with 150 nL detection volume Inline spectra are obtained to monitor the kinetics and unravel the reaction mechanism of this industrially relevant reaction. The experiments are combined with conventional 2D NMR measurements to identify the reaction products. In addition, we replace DIPEA with triethylamine and pyridine to validate the reaction mechanism for different amine catalysts. In all three acetylation reactions, we find that the acetyl ammonium ion is a key intermediate. The formation of ketene is observed during the first minutes of the reaction when tertiary amines were present. The pyridine-catalyzed reaction proceeds via a different mechanism.

Journal of the American Chemical Society published new progress about Acetylation. 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

Javaherian, Mohammad published the artcileNano-silica melamine trisulfonic acid as an efficient and reusable heterogeneous catalyst in esterification reactions, Quality Control of 140-11-4, the main research area is silica melamine trisulfonic acid catalyst esterification reaction.

The use of nano-silica melamine trisulfonic acid as a reusable heterogeneous solid acid catalyst in the esterification reaction of carboxylic acids and alcs. is reported. The reaction conditions were optimized by testing temperature, each component of catalyst, feedstock ratios as well as load of catalyst. The synthesized catalyst was characterized by X-ray diffraction, SEM, Fourier transform IR spectroscopy, and thermogravimetric anal. techniques. The results showed that nano-silica melamine trisulfonic acid was an efficient dehydrating agent in the condensing reactions between different kinds of aliphatic and aromatic carboxylic acids and alcs. The method was simple, rapid, straightforward, catalyst reusability, and holds potential for further application in acid-catalyzed organic synthesis and industrial requirements.

Journal of the Iranian Chemical Society published new progress about Acetylation. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Quality Control of 140-11-4.

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

Veisi, Hojat published the artcileFe3O4@PEG core/shell nanoparticles as magnetic nanocatalyst for acetylation of amines and alcohols using ultrasound irradiations under solvent-free conditions, Computed Properties of 140-11-4, the main research area is iron oxide polyoxyethylene core shell nanoparticle magnetic nanocatalyst acetylation; alc acetylation catalyst mangetic nanocomposte green.

Ultrasound irradiation was used to prepare one-pot Fe3O4@PEG core/shell nanostructure for the first time. The morphol., structure, and physicochem. properties were specified by different anal. techniques including field emission SEM, Fourier transform IR spectroscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, X-ray powder diffraction, and vibrating sample magnetometer. For acetylation of phenols, alcs., and amines, the synthesized Fe3O4@PEG core/shell nanoparticles were used as an efficient heterogeneous and green catalyst with acetic anhydride under sonication applying mild reaction conditions. Different electron-withdrawing and electron-donating substrates indicate a prominent yield of desired products with the merit of reusability of Fe3O4@PEG nanocatalyst and magnetic separation

Research on Chemical Intermediates published new progress about Acetylation. 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

Khaligh, Nader Ghaffari published the artcile4-Imidazol-1-yl-butane-1-sulfonic acid ionic liquid: Synthesis, structural analysis, physical properties and catalytic application as dual solvent-catalyst, Product Details of C9H10O2, the main research area is imidazolylbutanesulfonic acid ionic liquid preparation solvent catalyst property; acetylation alc phenol thiol amine tocopherol green chem.

4-Imidazol-1-yl-butane-1-sulfonic acid (ImBu-SO3H) has been successfully synthesized and fully characterized by FT-IR and high-resolution NMR spectroscopy (1H, 13C). The “”plausible”” alternative structures of ImBu-SO3H were discussed on the basis of its NMR data. The ionic liquid showed interesting dual solvent-catalyst property, which was studied exptl. for the acetylation of a variety of functionalized alcs., phenols, thiols, amines and α-tocopherol (α-CTP) as the most active form of vitamin E with acetic anhydride and which provided good yields within a short reaction time. ImBu-SO3H was successfully recycled by product extraction with an average recovered yield of 82% for 5 subsequent runs. The catalytic activity of the recycled ImBu-SO3H showed almost no loss even after five consecutive runs.

Phosphorus, Sulfur and Silicon and the Related Elements published new progress about Acetylation. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Product Details of C9H10O2.

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

Eddine, Naoures J. published the artcileIron (III) Chloride Hexahydrate as a Highly Efficient Catalyst for Acetylation of Protic Nucleophiles with Acetic Anhydride under Solvent-free Conditions, Safety of Benzyl acetate, the main research area is iron chloride hexahydrate catalyst acetylation protic nucleophile acetic anhydride; solvent free condition.

Acetylation of protic nucleophiles is used to protect these functional groups. Most of the methods described in the literature use solvents, one or more equivalent of toxic bases or expensive and toxic catalysts. Therefore, new methodologies, above all, greener and more economical procedures, are still in demand. An eco-efficient method was developed for the acetylation of alcs., phenols, thiols, amines, and carbohydrates, using acetic anhydride and a catalytic amount of the environmentally benign and inexpensive FeCl3.6H2O under solvent-free conditions. Acetylation of a variety of protic nucleophiles was performed using 0.2 mol % of FeCl3.6H2O as the catalyst, and 1.2 equiv of Ac2O as the acetylating agent at room temperature and under solvent-free conditions. This procedure appears to be highly efficient and promoted rapid and quant. acetylation under simple and min. manipulation. Chromatog. or recrystallization was generally not necessary for the purification of products. This eco-friendly protocol appears to be potentially universally applicable in organic design to protect protic nucleophiles and isscalable for industrial fields.

Current Organocatalysis published new progress about Acetylation. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Safety of Benzyl acetate.

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

Hoseini, L. published the artcileEffect of the Amount of BaO Catalyst on the Selective Acetylation of Benzyl Alcohols and Doxycycline Degradation, Recommanded Product: Benzyl acetate, the main research area is benzyl alc selective acetylation barium oxide nanocatalyst doxycycline degradation.

In this study, BaO nanoflower-like was prepared by using a template and identified using a variety of techniques. The sample was characterized by XRD measurements, SEM, diffuse reflectance spectroscopy (DRS) and energy dispersive X-ray spectroscopy (EDX). The catalytic activity of BaO system in the acetylation of alcs. was studied. The formation of products proceeds on the catalysts with predominantly strong basic sites. This catalyst is inexpensive and easy to handle, and the acetylation of hydroxyl groups using this catalyst only required a low loading of the catalyst. The catalytic degradation of doxycycline has been investigated in aqueous phase using MgO and BaO nanostructures.

Chemistry Africa published new progress about Acetylation. 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

Ghosh, Topi published the artcileHybrid Cobalt Doped-Cerium Oxide as a Multifunctional Nanocatalyst for Various Organic Transformations, Recommanded Product: Benzyl acetate, the main research area is cobalt cerium oxide nanocatalyst organic.

Development of a low-cost, environmentally benign and robust catalyst for multipurpose industrially relevant organic transformations is highly desirable for the sustainable future of chem. industries. A hybrid cobalt doped-cerium oxide nanocatalyst (Co@CeO2NC) was prepared via simple coprecipitation method using water as the solvent. The characterization of Co@CeO2NC was performed using different techniques such as XRD, TGA, FE-SEM, HR-TEM, EDAX-mapping, BET, and XPS anal. The structural characterization of the prepared sample by XRD and XPS anal. revealed the presence of the mixed phase of cobalt oxide and cobalt doped-cerium oxide as a hybrid (Co@CeO2NC). Industrially relevant organic transformations such as (i) nitrile formation using aldehyde with hydroxylamine hydrochloride, (ii) reductive amination of aldehydes to form tertiary N,N-di-Me amines, and (iii) direct acetylation of alcs./amines with acetic acid were achieved in an excellent manner using Co@CeO2NC hybrid as the multifunctional catalyst. Excellent catalytic activity of Co@CeO2NC was noticed for the conversion of 4-chlorobenzaldehyde to 4-chlorobenzonitrile with 99% conversion and 99% selectivity and 100% conversion of benzaldehyde to N,N-dimethylbenzylamine using DMF as NMe2 source, reductant, and solvent. Moreover, acetylation of 4-methoxybenzyl alc. and 2-Me aniline gave excellent conversion and selectivity toward the formation of -O and -N acetyl. The scope of the Co@CeO2NC was further evaluated for other aldehydes, alcs., and amines with an excellent conversion and high selectivity.

ACS Sustainable Chemistry & Engineering published new progress about Acetylation. 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

Rajitha, Nampally published the artcileAcetylation of phenols, alcohols and amines catalyzed by mono ammonium salt of 12-tungstophosphoric acid under ambient conditions, Computed Properties of 140-11-4, the main research area is phenol alc amine catalyst tungstophosphoric acid monoammonium salt acetylation.

A simple, highly rapid and efficient method is developed for the acetylation of phenols, alcs. and amines with excellent yield using monoammonium salt of 12-Tungstophosphoric acid [(NH4)H2PW12O40] as a solid phase catalyst under ambient conditions. The salient features of this hetero polyacid catalyst are simple workup procedure, short reaction time, insoluble both in protic and aprotic solvents, high yield and reusable nature.

Journal of Applicable Chemistry (Lumami, India) published new progress about Acetylation. 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