Category: 140-11-4

Biswas, Animesh published the artcileAcyl Donor Intermediates in N-Heterocyclic Carbene Catalysis: Acyl Azolium or Azolium Enolate?, Recommanded Product: Benzyl acetate, the main research area is acyl azolium enolate intermediate nitrogen heterocyclic carbene reaction mechanism; N-heterocyclic carbenes; X-ray diffraction; esters; reaction mechanisms; structure elucidation.

Azolium enolates and acyl azolium cations have been proposed as intermediates in numerous N-heterocyclic carbene (NHC) catalyzed transformations. Acetyl azolium enolates were generated from the reaction of 2-propenyl acetate with both saturated (SIPr) and aromatic (IPr) NHCs, isolated, and characterized (NMR, XRD). Protonation with triflic acid gave the corresponding acetyl azolium triflates which were isolated and characterized (NMR, XRD). Acyl azolium cations have been proposed as immediate precursors of the ester product, for example, in the redox esterification of α,β-enals. Studies with d3-acetyl azolium triflate suggest that ester formation originates instead from an azolium enolate intermediate. Furthermore, the acetyl azolium enolate selectively reacted with alc. nucleophiles in the presence of amines. While the acetyl azolium cation did not react with alcs., an ester-selective reaction was induced by addition of base, by intermediate formation of the acetyl azolium enolate.

Angewandte Chemie, International Edition published new progress about Amidation. 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

Braun, Norbert A. published the artcileJasminum grandiflorum: Influence of Flower Processing and Geographic Origin on Flower Absolute Composition, Product Details of C9H10O2, the main research area is Jasminum grandiflorum flower absolute composition geog origin processing.

Five Jasminum grandiflorum flower absolutes harvested as flower buds and processed in the ”J. sambac-way” in different locations in the southern Indian state of Tamil Nadu were analyzed using gas chromatog. (GC) and GC-mass spectrometry. These absolutes were compared with 5 com. Indian J. grandiflorum flower absolutes manufactured in the traditional ”J. grandiflorum-way” from open flowers. Focus was placed on 42 key ingredients to investigate the influence of such a flower processing on the absolute composition Our study established olfactive and composition differences of such absolutes produced via the ”J. sambac-way”. In addition, geog. variations in this species were analyzed by comparing 5 com. Indian J. grandiflorum flower absolutes with absolutes from Egypt and Morocco, resp. A composition range of the absolutes was established for the 3 main J. grandiflorum flower grower countries using a total of 14 com. samples. The 12 main ingredients in the absolutes showed variations between 4.3% and 89.7%.

Natural Product Communications published new progress about Extraction. 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

Zhang, Tengxun published the artcileGenome-wide identification, characterization, expression and enzyme activity analysis of coniferyl alcohol acetyltransferase genes involved in eugenol biosynthesis in Prunus mume, Application of Benzyl acetate, the main research area is Prunus mume CFAT1 gene petal stamen eugenol biosynthesis.

Prunus mume, a traditional Chinese flower, is the only species of Prunus known to produce a strong floral fragrance, of which eugenol is one of the principal components. To explore the mol. mechanism of eugenol biosynthesis in P. mume, patterns of dynamic, spatial and temporal variation in eugenol were analyzed using GC-MS. Coniferyl alc. acetyltransferase (CFAT), a member of the BAHD acyltransferase family, catalyzes the substrate of coniferyl alc. to coniferyl acetate, which is an important substrate for synthesizing eugenol. In a genome-wide anal., we found 90 PmBAHD genes that were phylogenetically clustered into five major groups with motif compositions relatively conserved in each cluster. The phylogenetic tree showed that the PmBAHD67-70 proteins were close to the functional CFATs identified in other species, indicating that these four proteins might function as CFATs. In this work, 2 PmCFAT genes, named PmCFAT1 and PmCFAT2, were cloned from P. mume ‘Sanlunyudie’, which has a strong fragrance. Multiple sequences indicated that PmCFAT1 contained two conserved domains, HxxxD and DFGWG, whereas DFGWG in PmCFAT2 was changed to DFGFG. The expression levels of PmCFAT1 and PmCFAT2 were examined in different flower organs and during the flowering stages of P. mume ‘Sanlunyudie’. The results showed that PmCFAT1 was highly expressed in petals and stamens, and this expression increased from the budding stage to the full bloom stage and decreased in the withering stage, consistent with the patterns of eugenol synthesis and emission. However, the peak of gene expression appeared earlier than those of eugenol synthesis and emission. In addition, the expression level of PmCFAT2 was higher in pistils and sepals than in other organs and decreased from the budding stage to the blooming stage and then increased in the withering stage, which was not consistent with eugenol synthesis. Subcellular localization anal. indicated that PmCFAT1 and PmCFAT2 were located in the cytoplasm and nucleus, while enzyme activity assays showed that PmCFAT1 is involved in eugenol biosynthesis in vitro. Overall, the results suggested that PmCFAT1, but not PmCFAT2, contributed to eugenol synthesis in P. mume.

PLoS One published new progress about Flower bud. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Application of Benzyl acetate.

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

Tsujikawa, Kenji published the artcileDegradation of 1-phenyl-2-propanone during long-term storage: useful information for methamphetamine impurity profiling, Formula: C9H10O2, the main research area is phenyl propanone methamphetamine impurity degradation storage.

1-Phenyl-2-propanone (P2P) is a main precursor of methamphetamine. The authors investigated the formation of P2P degradation products during long-term storage and the factors that affected P2P degradation Samples of neat P2P, 1 mg/mL P2P in methanol and in Et acetate were prepared These samples were stored at room temperature or 4°C for 1, 3, and 6 mo; then the samples were analyzed by gas chromatog.-mass spectrometry. A similar experiment (but stored only for 1 mo) was also performed for phenylacetylcarbinol. Neat P2P stored at room temperature gave degradation products after 3-mo storage, and the degradation proceeded over the next 3 mo. Benzaldehyde, benzoic acid, benzyl acetate, 1-phenyl-1,2-propanedione, phenylacetylcarbinol, 1-acetoxy-1-phenyl-2-propanone, and 1,1-diphenylacetone were identified as degradation products after 6-mo storage. The degradation was prevented incompletely by storage at 4°C and almost completely by storage in the organic solvents. Neat phenylacetylcarbinol stored at room temperature was remarkably decomposed Benzaldehyde, benzoic acid, 1-phenyl-1,2-propanedione, and 1-acetoxy-1-phenyl-2-propanone were regarded as the degradation products. The degradation was prevented incompletely by storage at 4°C and almost completely by storage in the organic solvents. These results suggested that P2P and phenylacetylcarbinol were oxidized by oxygen in air and that the organic solvents inhibited the oxidation P2P was presumed to be initially oxidized to phenylacetylcarbinol, then it was converted to benzaldehyde, benzoic acid, 1-phenyl-1,2-propanedione, and 1-acetoxy-1-phenyl-2-propanone. Production of phenylacetylcarbinol from P2P is useful information for methamphetamine impurity profiling because phenylacetylcarbinol is a precursor of ephedrines, the other methamphetamine precursors.

Forensic Toxicology published new progress about Impurities. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Formula: C9H10O2.

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

Behera, Satyaranjan published the artcileAn efficient, economical and eco-friendly acylation of alcohols and amines by alum doped nanopolyaniline under solvent-free condition, Application In Synthesis of 140-11-4, the main research area is alum nanopolyaniline catalyst alc amine acylation.

We report acylation of alcs. and amines employing acetic acid as an acylating agent in solvent-free condition by using alum doped nanopolyaniline (NDPANI) as a catalyst. This environmentally benign method does not use corrosive acid anhydrides and acid chlorides for acylation and does not produce waste product. Also, a non-toxic potash alum was used for doping of polyaniline rather than corrosive acids. The reaction conditions represent an advance over established method not only in omitting the need for expensive catalysts or solvents but also in shortening the reaction time significantly. The advantages of this catalyst are non-hazardous, cheap, reusable, easy to prepare and handling.

Applied Catalysis, A: General published new progress about Acylation. 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

Ait Khouya, Ahmed published the artcileCoating of polydopamine on polyurethane open cell foams to design soft structured supports for molecular catalysts, Safety of Benzyl acetate, the main research area is polyurethane open cell foam polydopamine coating catalyst support.

Polydopamine-coated polyurethane open cell foams are used as structured supports for mol. catalysts through the covalent anchoring of alkoxysilyl arms by the catechol groups of the mussel-inspired layer. This strong bonding prevents their leaching. No alteration of the mech. properties of the flexible support is observed after repeated uses of the catalytic materials.

Chemical Communications (Cambridge, United Kingdom) published new progress about Acylation. 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

Luna-Mora, Ricardo Alfredo published the artcileSimultaneous infrared-ultrasound irradiation in organic synthesis: acylation of amines alcohols and amino alcohols, Application of Benzyl acetate, the main research area is amine acylation IR ultrasonication green chem; alc acylation IR ultrasonication.

The acylation of both aliphatic and aromatic amines, alcs. and amino alcs. by simultaneous IR-ultrasound irradiation (SIUI) in solvent-free conditions in short reaction times and with good to excellent yields was achieved. The results obtained with SIUI and for thermal, IR and ultrasound energy sources are compared. This is the first report regarding to the application of SIUI in acylation reactions.

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

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

Tandon, Nitin published the artcileMagnetically recyclable silica-coated ferrite magnetite-K10 montmorillonite nanocatalyst and its applications in O, N, and S-acylation reaction under solvent-free conditions, Quality Control of 140-11-4, the main research area is silica coated ferrite magnetite montmorillonite nanocatalyst; oxygen nitrogen sulfer acylation reaction solvent free condition.

Novel silica-coated ferrite nanoparticles supported with montmorillonite (K10) have been prepared successfully by using a simple impregnation method. Further, these nanoparticles were characterized by using different anal. methods like FT-IR, PXRD, EDS, and FE-SEM techniques. In addition, these nanoparticles have been explored for their catalytic activity for the O, N, and S-acylation reactions under solvent-free conditions which gave moderate to excellent yields in a much shorter reaction time. Moreover, these nanoparticles could easily be separated out from the reaction medium after the reaction completion by using an external magnetic field and have been re-used for 10 cycles without any significant loss of the catalytic activity.

RSC Advances published new progress about Acylation. 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

Dias, L. G. published the artcileAroma profile of rice varieties by a novel SPME method able to maximize 2-acetyl-1-pyrroline and minimize hexanal extraction, Synthetic Route of 140-11-4, the main research area is acetyl pyrroline hexanal rice aroma extraction SPME method; 2-acetyl-1-pyrroline; Aromatic rice; Experimental design; PCA; SPME; Volatile compound.

The solid phase microextraction (SPME) has been the most used technique for the extraction of volatile compounds from rice because of its easy operation and solvent-free. The extraction parameters, sample mass and incubation temperature, were optimized through a central composite rotational design (CCRD), aiming at maximizing the extraction of 2-acetyl-1-pyrroline (2AP), the main compound responsible for the aroma in aromatic rice, and minimizing the generation of hexanal, a marker of lipid oxidation Besides, the time of sample incubation and fiber exposure for the extraction of the volatile compounds from rice were determined The optimized conditions for SPME were: 2.5 g of ground rice in a 20 mL vial, sample incubation at 80°C for 60 min and exposure of the divinylbenzene/carboxene/polydimethylsiloxane (DVB/CAR/PDMS) fiber in the headspace for 10 min. The optimized method was successfully applied to 12 varieties of rice and principal component anal. (PCA) was performed to observe similarities in their volatile profile. A total of 152 volatile compounds were identified among the different rice varieties. From these, 42 were identified in arborio rice, 47 in basmati brand A, 43 in basmati brand B, 55 in black rice, 63 in brown rice, 39 in jamine rice, 50 in parboiled brown rice, 43 in parboiled rice, 54 in red rice, 63 in sasanishiki rice, 46 in white rice and 70 in wild rice.

Food Research International published new progress about Brown rice. 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

Roberts, Rebecca E. published the artcileOdorant receptor orthologues in conifer-feeding beetles display conserved responses to ecologically relevant odors, Application In Synthesis of 140-11-4, the main research area is conifer feeding beetle odor odorant receptor response; Coleoptera; Curculionidae; HEK293 cells; de-orphanization; evolutionary conservation; functional characterization.

Insects are able to detect a plethora of olfactory cues using a divergent family of odorant receptors (ORs). Despite the divergent nature of this family, related species frequently express several evolutionarily conserved OR orthologues. In the largest order of insects, Coleoptera, it remains unknown whether OR orthologues have conserved or divergent functions in different species. Using HEK293 cells, we addressed this question through functional characterization of two groups of OR orthologues in three species of the Curculionidae (weevil) family, the conifer-feeding bark beetles Ips typographus L. (“”Ityp””) and Dendroctonus ponderosae Hopkins (“”Dpon””) (Scolytinae), and the pine weevil Hylobius abietis L. (“”Habi””; Molytinae). The ORs of H. abietis were annotated from antennal transcriptomes. The results show highly conserved response specificities, with one group of orthologues (HabiOR3/DponOR8/ItypOR6) responding exclusively to 2-phenylethanol (2-PE), and the other group (HabiOR4/DponOR9/ItypOR5) responding to angiosperm green leaf volatiles (GLVs). Both groups of orthologues belong to the coleopteran OR subfamily 2B, and share a common ancestor with OR5 in the cerambycid Megacyllene caryae, also tuned to 2-PE, suggesting a shared evolutionary history of 2-PE receptors across two beetle superfamilies. The detected compounds are ecol. relevant for conifer-feeding curculionids, and are probably linked to fitness, with GLVs being used to avoid angiosperm nonhost plants, and 2-PE being important for intraspecific communication and/or playing a putative role in beetle-microbe symbioses. To our knowledge, this study is the first to reveal evolutionary conservation of OR functions across several beetle species and hence sheds new light on the functional evolution of insect ORs.

Molecular Ecology published new progress about Coleoptera. 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