Category: 517-23-7

Kenny, Miles published the artcilePalladium-Catalysed Construction of All-Carbon Quaternary Centres with Propargylic Electrophiles: Challenges in the Simultaneous Control of Regio-, Chemo- and Enantioselectivity, Category: esters-buliding-blocks, the publication is Synthesis (2018), 50(9), 1796-1814, database is CAplus.

This article describes the palladium-catalyzed three-component coupling of 1,3-dicarbonyl compounds with nucleophiles and propargylic electrophiles for the generation of quaternary all-carbon centers in a single step, which necessitates the simultaneous control of regio-, chemo- and enantioselectivity. The use of propargyl enol carbonates, the source of two of the components, was found to be essential in maintaining high levels of regiocontrol and chemoselectivity, whereas a careful anal. of pK_a trends of O-, C- and N-nucleophiles as the other coupling partner indicates that the highest levels of selectivity are likely to be obtained with relatively acidic species, such as phenols, 1,3-dicarbonyl compounds and aromatic N-heterocycles. Finally, studies towards the development of the catalytic enantioselective construction of quaternary all-carbon centers by means of alkenylation and allylic alkylation are disclosed.

Synthesis 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

Begum, Zubeda published the artcileSimple primary β-amino alcohols as organocatalysts for the asymmetric Michael addition of β-keto esters to nitroalkenes, Product Details of C6H8O3, the publication is RSC Advances (2021), 11(1), 203-209, database is CAplus and MEDLINE.

Simple primary β-amino alcs. acted as an efficient organocatalysts in the asym. Michael addition of β-keto esters with nitroalkenes which afforded highly pure chiral Michael adducts. Also, both enantiomers of the adducts were obtained, depending on the specific catalyst used and reaction temperature

RSC Advances 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, Product Details of C6H8O3.

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

Watanabe, Michiko published the artcileApplication of cytochrome P450 reactivity on the characterization of chemical compounds and its association with repeated-dose toxicity, Related Products of esters-buliding-blocks, the publication is Toxicology and Applied Pharmacology (2020), 114854, database is CAplus and MEDLINE.

Repeated-dose toxicity (RDT) studies are one of the critical studies to assess chem. safety. There have been some studies attempting to predict RDT endpoints based on chem. substructures, but it remains very difficult to establish such a method, and a more detailed characterization of chem. compounds seems necessary. Cytochrome P450s (P450s) comprise multiple forms with different substrate specificities and play important roles in both the detoxification and metabolic activation of xenobiotics. In this study, we investigated possible use of P 450 reactivity of chem. compounds to classify the compounds A total of 148 compounds with available rat RDT test data were used as test compounds and subjected to inhibition assays against 18 human and rat P450s. Among the tested compounds, 82 compounds inhibited at least one P 450 form. Hierarchical clustering analyses using the P 450 inhibitory profiles divided the 82 compounds into nine groups, some of which showed characteristic chem. and biol. properties. Principal component analyses of the P 450 inhibition data in combination with the calculated chem. descriptors demonstrated that P 450 inhibition data were plotted differently than most chem. descriptors in the loading plots. Finally, association analyses between P 450 inhibition and RDT endpoints showed that some endpoints related to the liver, kidney and hematol. were significantly associated with the inhibition of some P450s. Our present results suggest that the P 450 reactivity profiles can be used as novel descriptors for characterizing chem. compounds for the investigation of the toxicity mechanism and/or the establishment of a toxicity prediction model.

Toxicology and Applied Pharmacology 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 C18H24N6O6S4, Related Products of esters-buliding-blocks.

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

La-ongthong, Kannika published the artcileCyclization of o-Alkynylisocyanobenzenes with 1,3-Dicarbonyl Compounds, Recommanded Product: 3-Acetyldihydrofuran-2(3H)-one, the publication is Synlett (2022), 33(14), 1411-1418, database is CAplus.

A facile and convenient reaction of o-alkynylisocyanobenzenes with various active-methylene compounds, including 1,3-diesters, 1,3-diketones,β-keto esters, and β-keto amides, under Bronsted basic conditions, had been developed. Di-Et malonate reacted smoothly with a collection of o-alkynylisocyanobenzenes to provide the corresponding 2-quinolin-2-yl malonates in excellent yields. Acetylacetone gave a mixture of quinolin-4-yl and quinolin-2-yl derivatives Acetoacetate esters and acetoacetyl amide derivative initially gave 2-quinolin-2-yl adducts that underwent partial deacetylation under the reaction conditions.

Synlett 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

Ram, Ram N. published the artcileβ,β,β-Trichloroethyl-NH-Enamine as Viable System for 5-Endo-trig Radical Cyclization via Multifaceted Cu^I-Cu^II Redox Catalysis: Single Step Synthesis of Multi-Functionalized NH-Pyrroles, Category: esters-buliding-blocks, the publication is Advanced Synthesis & Catalysis (2019), 361(24), 5661-5676, database is CAplus.

A mild and regioselective copper-catalyzed direct synthesis of multi-substituted and functionalized NH-pyrroles was reported in high yields from diverse β,β,β-trichloroethyl-NH-enamines via a novel 5-endo-trig radical cyclization mode, previously known to be unviable in the enamine system. An approach to transform a geometrically ‘disfavored to favored’ 5-endo-trig radical cyclization mode in NH-enamine systems via multifaceted Cu^I-Cu^II redox catalysis generating radicals, preventing dehalogenative reduction of radical precursors and dehydrohalogenating the 5-endo-trig cyclized products was demonstrated exptl. With wider substrate scope, this method incorporated halo-, NH- and carbonyl functionalities besides alkyl, aryl and heteroaryl substituents in the pyrrole unit easily. These difficult 3-halo-NH-pyrroles are potential sources for natural products, agrochems., pharmaceuticals and organometallic chem.

Advanced Synthesis & Catalysis 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

Tanemura, Kiyoshi published the artcileSilica gel-mediated catalyst-free and solvent-free Michael addition of 1,3-dicarbonyl compounds to highly toxic methyl vinyl ketone without volatilization, COA of Formula: C6H8O3, the publication is Tetrahedron Letters (2020), 61(30), 152142, database is CAplus.

Silica gel-mediated Michael addition of 1,3-dicarbonyl compounds to Me vinyl ketone (MVK) and Et vinyl ketone (EVK) was carried out to give the corresponding adducts in quite excellent yields. The reactions could be carried out without any catalysts and solvents. In addition, highly toxic MVK and EVK could be employed without significant volatilization. Silica gel could be recycled five times without the decrease of the yields.

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 C9H9NO, COA of Formula: C6H8O3.

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

Naksing, Thanyarat published the artcileBiological activities and potential of organic banana (Musa acuminata) peel extract in enhancing the immunity of giant freshwater prawn (Macrobrachium rosenbergii), SDS of cas: 517-23-7, the publication is Aquaculture Research (2022), 53(7), 2645-2656, database is CAplus.

This research aimed to optimize the extracting condition of banana peel (BP) and to investigate the effect of organic banana peel extract (BPE) on the immunity of giant freshwater prawn (Macrobrachium rosenbergii). The result demonstrated that the optimum extracting condition of organic BPE was 50% volume/volume of methanol at 100°C for 10 min. Under this condition, the maximum total phenolic content and extraction yield of 10.44 mg of gallic acid equivalent (GAE) per g of dry matter (mg GAE/g DM) and 33% w/v were obtained resp. The organic BPE could inhibit an aquatic pathogen Aeromonas hydrophila at the min. inhibitory concentration of 625μg/ disk. The main phytochems. in organic BPE showed two major biol. functions, which are antioxidant and antipathogenic activities. Subsequently, the effects of organic BPE on the immunity of M. rosenbergii were investigated. The results demonstrated that the organic BPE could increase immunity and phagocytic activity and decrease the susceptibility of M. rosenbergii. Moreover, the organic BPE could also increase total as well as differential hematocyte count, decrease the coagulation time and increase the total protein in serum of M. rosenbergii. The phagocytic activity of prawn was enhanced to 82.00% by using an organic BPE at 6μg/g. At the same time, the cumulative mortality was declined to lower 20% after 6 days of organic BPE injection. In conclusion, organic BPE can be a potential immunostimulant in giant freshwater prawn culture. The utilization of BP in aquaculture can further add the value of BP and reduce organic pollutants.

Aquaculture Research 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, SDS of cas: 517-23-7.

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

Xu, Yan-Li published the artcileHighly enantioselective one-pot sequential synthesis of valerolactones and pyrazolones bearing all-carbon quaternary stereocentres, Quality Control of 517-23-7, the publication is Organic & Biomolecular Chemistry (2021), 19(7), 1610-1615, database is CAplus and MEDLINE.

Highly enantiopure and bioactive δ-valerolactones I (R = Me, Ph, 1-naphthyl, 2-chlorophenyl, etc.; R¹ = Ph, 1-naphthyl, 2-methylphenyl, etc.; n = 0, 1), and pyrazolones II, bearing α-all-carbon quaternary stereocentres, were successfully and sequentially prepared via a one-pot procedure starting from readily available, inexpensive materials, catalyzed by a new chiral squaramide III under mild reaction conditions. An organocatalytic Michael reaction afforded the valerolactones I, while a one-pot Michael-hydrazinolysis-imidization cascade yielded the pyrazolones II. This procedure is economically efficient and environmentally benign.

Organic & Biomolecular 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 C10H14O, Quality Control of 517-23-7.

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

Li, Shuangshuang published the artcilePractical allylation with unactivated allylic alcohols under mild conditions, Recommanded Product: 3-Acetyldihydrofuran-2(3H)-one, the publication is Organic Chemistry Frontiers (2021), 8(13), 3354-3359, database is CAplus.

A practical palladium/calcium catalytic system was developed for dehydrative allylation with unactivated allylic alcs. EtOH solvent with a H₂O additive was identified as powerful medium to accelerate proton transfer. This catalytic system and environmentally benign medium enabled a variety of soft carbonic nucleophiles and allylic alcs. to react smoothly at room temperature with water as the only byproduct. A wide spectrum of allylic compounds bearing a variety of functional groups I [R = Me, CN, CO₂Et, etc.; R¹ = CO₂Me, CO₂Et; R² = CN, NO₂, CO₂Me, CO₂Et; R³ = H, Me; R⁴ = H, Me; R⁵ = Ph, 2-FC₆H₄, 2-thienyl, etc.] could be obtained with high to excellent yields.

Organic Chemistry Frontiers 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

Liu, Ze-Shui published the artcilePalladium/Norbornene Cooperative Catalysis To Access Tetrahydronaphthalenes and Indanes with a Quaternary Center, Safety of 3-Acetyldihydrofuran-2(3H)-one, the publication is ACS Catalysis (2018), 8(6), 4783-4788, database is CAplus.

A cooperative catalytic system comprising a palladium/XPhos complex and 5-norbornene-2-carboxylic acid was developed. This system promotes a two-component annulation reaction, allowing the construction of tetrahydronaphthalenes and indanes that contain quaternary centers through consecutive Catellani-type C-H activation and redox-relay Heck reaction. Inexpensive 5-norbornene-2-carboxylic acid acts as a catalytic mediator (20 mol %) in this process. This mild, scalable, and chemoselective protocol is compatible with a wide variety of readily available aryl iodides and alkylating reagents. Application of this method in a 4-step synthesis of opioid analgesic eptazocine is demonstrated. Preliminary studies underscore the future promise of rendering this Catellani/redox-relay Heck cascade enantioselective.

ACS Catalysis 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, Safety of 3-Acetyldihydrofuran-2(3H)-one.

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