Category: 517-23-7

Wang, Jia published the artcileCatalytic Conversion of Bamboo Sawdust over ZrO₂-CeO₂/γ-Al₂O₃ to Produce Ketonic Hydrocarbon Precursors and Furans, Formula: C6H8O3, the publication is ACS Sustainable Chemistry & Engineering (2018), 6(11), 13797-13806, database is CAplus.

A series of metal oxides including ZrO₂/γ-Al₂O₃, CeO₂/γ-Al₂O₃, and ZrO₂-CeO₂/γ-Al₂O₃ were synthesized and employed to conduct catalytic fast pyrolysis of bamboo sawdust via an anal. pyrolyzer/gas chromatograph/mass spectrometer (Py-GC/MS) to produce hydrocarbon precursors such as ketones and furans. Exptl. results illustrated that the use of metal oxides enhanced the formation of ketones and monoarom. hydrocarbons compared to catalyst-free trial. Among the metal oxides, ZrO₂-CeO₂/γ-Al₂O₃ exhibited the most significant ketonization and aldol condensation activities yielding the highest concentration of linear and cyclic ketones. In addition, nonacidic oxygenates such as furfural, acetol, butanedial, 2,3-dihydrobenzofuran, and Me acetate, were efficiently converted into hydrocarbon precursors over metal oxides. A dual catalytic bed system integrating ZrO₂-CeO₂/γ-Al₂O₃ and HZSM-5 significantly facilitated the production of aromatic hydrocarbons compared to pure HZSM-5 catalytic run. The use of ZrO₂-CeO₂/γ-Al₂O₃ mixed with HZSM-5 mode maximized the formation of xylenes, while ZrO₂-CeO₂/γ-Al₂O₃ mixed with bamboo sawdust catalytic trial increased the concentration of benzene, toluene, and alkylbenzenes.

ACS Sustainable Chemistry & Engineering published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C10H18O, Formula: C6H8O3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Maczka, Wanda published the artcileBiotransformation of α-acetylbutyrolactone in Rhodotorula strains, Recommanded Product: 3-Acetyldihydrofuran-2(3H)-one, the publication is International Journal of Molecular Sciences (2018), 19(7), 2106/1-2106/11, database is CAplus and MEDLINE.

Due to its structural similarity, the α-1-hydroxyethyl-γ-butyrolactone obtained by reduction of (±)-α-acetyl-γ-butyrolactone may have a similar function in the body to γ-butyrolactone (GBL). In the work presented, biotransformation of α-acetyl-γ-butyrolactone by three Rhodotorula strains was performed obtaining enantiomerically enriched alc. The process was carried out in growing and resting cultures. We studied how both media composition and organic solvent volume affected stereoselectivity and effectiveness of biotransformation. After 2 h, the enantiomerically pure (3R, 1 S)-α-1-hydroxyethyl-γ-butyrolactone was obtained using the R. marina AM77 strain in YPG (Yeast extract-Peptone-Glucose) medium enriched with 5% glycerol. To our best knowledge there is no previous information in the literature about the (±)-α-acetyl-γ-butyrolactone biotransformation performed in medium with addition of organic and deep eutectic solvents.

International Journal of Molecular Sciences published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C6H8O3, Recommanded Product: 3-Acetyldihydrofuran-2(3H)-one.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Xie, Peizhong published the artcileCalcium-catalyzed regioselective dehydrative cross-coupling of propargylic alcohols with 1,3-dicarbonyl compounds, Synthetic Route of 517-23-7, the publication is Green Chemistry (2019), 21(19), 5207-5211, database is CAplus.

A novel calcium-catalyzed in situ dehydrative cross-coupling reaction of propargylic alcs. with 1,3-dicarbonyl compounds was developed. This catalytic system can suppress the competitive Meyer-Schuster rearrangement, control regioselectivity, and enable the desired process to occur under solvent-free conditions at room temperature with water as the only byproduct. A variety of vicinal tertiary and all-carbon quaternary centers can be obtained in high yields with broad functional group tolerance.

Green Chemistry published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C11H8O3, Synthetic Route of 517-23-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Xu, Yan-Li published the artcileOrganocatalytic enantioselective electrophilic amination of benzoyl butyrolactones, HPLC of Formula: 517-23-7, the publication is Tetrahedron Letters (2022), 153745, database is CAplus.

Organocatalytic electrophilic amination of benzoyl butyrolactones with azodicarboxylates was demonstrated to highly efficiently prepare quaternary carbon stereocenter-bearing α-amino-γ-butyrolactones I [R = Me, Ph, OBn, etc.], key framework in numerous bioactive compounds The squaramide catalyst II realized the highest yield (99%) and enantioselectivity (93%).

Tetrahedron Letters published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C24H29N5O3, HPLC of Formula: 517-23-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Yang, Zhijun published the artcileBio-inspired self-healing polyurethanes with multiple stimulus responsiveness, Recommanded Product: 3-Acetyldihydrofuran-2(3H)-one, the publication is Polymer Chemistry (2019), 10(24), 3362-3370, database is CAplus.

High-performance stimuli-responsive polymers that exhibit spontaneous, sophisticated and reversible responses to a wide range of external stimuli are highly desirable for applications in diverse fields and have attracted dramatic attention in recent decades. However, it still remains a great challenge to precisely design mol. architectures which can integrate multi-stimuli responsive functions into one structure in polymeric materials. In this study, we reported the synthesis and preparation of a novel multi-responsive self-healing polyurethane with superior mech. properties by adapting a stimuli-responsive dynamic covalent chem. crosslinker and a biomimetic modular polymer design. This unique crosslinker was synthesized through the Michael addition reaction between thiols and bismaleimides, making the chem. crosslinked polyurethanes healable and recyclable at an elevated temperature as well as stimuli-responsive to heat, pH and ammonia gas. A visible color change can be clearly observed when the polymer is in the base or ammonia gas environment, giving the sample great potential for being a gas or pH sensor. Furthermore, the incorporation of self-complementary quadruple hydrogen bonding interactions between 2-ureido-4-[1H]-pyrimidione (UPy) motifs in the polyurethane backbone chains enables the formation of modular hydrogen bonding domains, endowing the material with enhanced mech. properties.

Polymer Chemistry published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C6H13I, Recommanded Product: 3-Acetyldihydrofuran-2(3H)-one.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Zhu, Yasheng published the artcileEnantioselective Construction of Single and Vicinal All-Carbon Quaternary Stereocenters through Ion Pair Catalyzed 1,6-Conjugate Addition, Formula: C6H8O3, the publication is Organic Letters (2021), 23(18), 7248-7253, database is CAplus and MEDLINE.

An asym. 1,6-conjugate addition to presynthesized δ-aryl-δ-cyano disubstituted para-quinone methides I (R = H, 3-Me, 3-bromo; Ar = Ph, 4-methylphenyl, 2-naphthyl, etc.) through bifunctional phosphonium-amide promoted ion pair catalysis for acyclic all-carbon quaternary stereocenter construction has been described. Both acyclic and cyclic 1,3-dicarbonyls CH₂(C(O)OR¹)₂ (R¹ = Ph, 2-methylphenyl, benzyl, etc.)/II (R² = Me, Et, Bu, allyl) participate in asym. alkylation reaction, furnishing a wide array of diarylmethanes bearing a single acyclic or vicinal cyclic and acyclic quaternary carbon stereocenters III/IV in high efficiency with excellent stereoselectivity. Computational studies elucidate the origin of enantioselectivity.

Organic Letters published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C38H74Cl2N2O4, Formula: C6H8O3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Li, Z. W. published the artcileAnalysis of volatile aroma compounds from five types of Fenghuang Dancong tea using headspace-solid phase microextraction combined with GC-MS and GC-olfactometry, Related Products of esters-buliding-blocks, the publication is International Food Research Journal (2021), 28(3), 612-626, database is CAplus.

The present work describes the relationship between volatile aroma components and flavors of Fenghuang Dancong tea. Volatile aroma components of five types of Fenghuang Dancong tea namely Baxian, Milanxiang, Yulanxiang, Guihuaxiang, and Yinhuaxiang were extracted by headspace solid-phase microextraction (HS-SPME), then analyzed by gas chromatog.- mass spectrometry (GC-MS) technique and gas chromatog. olfactometry (GC-O) techniques. The GC-MS results showed that a total of 116 volatile components were detected, among which 21 (including alcs., esters, olefins, aldehydes, ketones, and alkanes) were commonly detected in all types of tea. Based on GC-O anal., 26 active ingredients that mainly contribute to grassy, sweet, floral, fruity, woody, and honey aromas were detected. Among these ingredients, four compounds including linalool oxide I, linalool, nerol, and neroli, which give floral, sweet, and honey aromas were abundant (with high aroma intensity) in all five types of tea. This suggests that these compounds are the main components contributing to the unique aroma of Fenghuang Dancong tea.

International Food Research Journal published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C6H8O3, Related Products of esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Cao, Shi-Xuan published the artcileMagnetic nanoparticles supported cinchona alkaloids for asymmetric Michael addition reaction of 1,3-dicarbonyls and maleimides, Category: esters-buliding-blocks, the publication is Chinese Chemical Letters (2018), 29(1), 201-204, database is CAplus.

Magnetic nanoparticles Fe₃O₄@SiO₂ supported cinchona alkaloids (quinine and quinidine) were successfully synthesized as magnetically recoverable organocatalysts and characterized by FT-IR, XPS, SEM measurements, and elemental anal. Their catalytic activity and stereoselectivity were preliminarily evaluated in the asym. Michael addition reaction of 1,3-dicarbonyl compounds and maleimides to afford 3-(2-oxocyclopentyl)pyrrolidine-2,5-dione derivatives I [R = H, Me, Bn, etc.; R¹ = C(O)Me, CO₂Et, CO₂Me], 3-[3-acetyl-2-oxo-tetrahydrofuran-3-yl]-1-benzyl-pyrrolidine-2,5-dione and ethyl-2-[1-benzyl-2,5-dioxo-pyrrolidin-3-yl]-3-oxo-butanoate. The supported quinine catalyst exhibited good catalytic efficiency and modest to high enantioselectivity. The magnetic recoverability and recyclability of the catalyst were also examined

Chinese Chemical Letters published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C6H8O3, Category: esters-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Arndt, Daniel published the artcileA complex matrix characterization approach, applied to cigarette smoke, that integrates multiple analytical methods and compound identification strategies for non-targeted liquid chromatography with high-resolution mass spectrometry, Quality Control of 517-23-7, the publication is Rapid Communications in Mass Spectrometry (2020), 34(2), e8571, database is CAplus and MEDLINE.

Rationale : For the characterization of the chem. composition of complex matrixes such as tobacco smoke, containing more than 6000 constituents, several anal. approaches have to be combined to increase compound coverage across the chem. space. Furthermore, the identification of unknown mols. requiring the implementation of addnl. confirmatory tools in the absence of reference standards, such as tandem mass spectrometry spectra comparisons and in silico prediction of mass spectra, is a major bottleneck. Methods : We applied a combination of four chromatog./ionization techniques (reversed-phase (RP) – heated electrospray ionization (HESI) in both pos. (+) and neg. (-) modes, RP – atm. pressure chem. ionization (APCI) in pos. mode, and hydrophilic interaction liquid chromatog. (HILIC) – HESI pos.) using a Thermo Q Exactive® liquid chromatog./high-resolution accurate mass spectrometry (LC/HRAM-MS) platform for the anal. of 3R4F-derived smoke. Compound identification was performed by using mass spectral libraries and in silico predicted fragments from multiple integrated databases. Results : A total of 331 compounds with semi-quant. estimates â‰?00 ng per cigarette were identified, which were distributed within the known chem. space of tobacco smoke. The integration of multiple LC/HRAM-MS-based chromatog./ionization approaches combined with complementary compound identification strategies was key for maximizing the number of amenable compounds and for strengthening the level of identification confidence. A total of 50 novel compounds were identified as being present in tobacco smoke. In the absence of reference MS² spectra, in silico MS² spectra prediction gave a good indication for compound class and was used as an addnl. confirmatory tool for our integrated non-targeted screening (NTS) approach. Conclusions : This study presents a powerful chem. characterization approach that has been successfully applied for the identification of novel compounds in cigarette smoke. We believe that this innovative approach has general applicability and a huge potential benefit for the anal. of any complex matrixes.

Rapid Communications in Mass Spectrometry published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C6H8O3, Quality Control of 517-23-7.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Bityukov, Oleg V. published the artcileSolvent-free silica gel mediated decarboxylation of C-O coupling products of β-diketones and β-oxo esters with malonyl peroxides, COA of Formula: C6H8O3, the publication is Mendeleev Communications (2019), 29(1), 55-56, database is CAplus.

Silica gel was found to mediate decarboxylation of tetracarbonyl compounds with a free carboxylic group prepared from β-dicarbonyl compounds and malonyl peroxides to give I [R¹ = Me; R² = Me, CH₂Ph, (CH₂)₂C(O)CH₃, etc.; R¹R² = (CH₂)₃, (CH₂)₄, O(CH₂)₂; R³ = Me, OEt; R⁴ = CHEt₂, CH(n-Bu)₂, c-C₄H₇, c-C₅H₉]. Under solvent-free heterogeneous conditions silica gel effectively acts as a mediator of C-O coupling with further decarboxylation at 120 °C.

Mendeleev Communications published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C6H8O3, COA of Formula: C6H8O3.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics