Category: 37443-42-8

Category: benzisoxazole. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Methyl tetrahydrofuran-2-carboxylate, is researched, Molecular C6H10O3, CAS is 37443-42-8, about Synthesis and Anticancer Activity of Structure Simplified Naturally Inspired Dimeric Chromenone Derivatives. Author is Ali, Rameez; Guan, Yong; Leveille, Alexandria N.; Vaughn, Elizabeth; Parelkar, Sangram; Thompson, Paul R.; Mattson, Anita E..

Select dimeric chromenones exhibit low micromolar cytotoxicity toward lymphoma and leukemia cell lines, L5178Y and HL60, resp. The bioactive dimeric chromenones were identified from a focused library of structurally simplified derivatives of naturally occurring dimeric chromenones and tetrahydroxanthones that was prepared as part of this study. The simple dimeric chromenone scaffolds contain no stereogenic centers, are easily synthesized, and may be utilized as lead compounds in cancer research and drug discovery.

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Benzisoxazole – an overview | ScienceDirect Topics

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov’t, Organic Letters called Divergent Reactivity during the Trapping of Benzynes by Glycidol Analogs: Ring Cleavage via Pinacol-Like Rearrangements vs Oxirane Fragmentations, Author is Zhang, Juntian; Hoye, Thomas R., which mentions a compound: 37443-42-8, SMILESS is O=C(C1OCCC1)OC, Molecular C6H10O3, Quality Control of Methyl tetrahydrofuran-2-carboxylate.

Hydroxy-containing cyclic ethers react with thermally generated benzynes to produce aryl ethers. Diverse reactivity was observed Cleavage of the cyclic ether was involved in most of the pathways. The transformations are rationalized via initial formation of oxonium ion-containing 1,3-zwitterions arising from preferential nucleophilic attack on the benzyne by the ether oxygen. Pinacol-like rearrangements, including ring expansion, to yield aldehydes or ketones and oxirane fragmentations to generate aryl enol ethers were main competing events.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Chlorination of tetrahydrofuran-2-carboxylic acid esters, published in 1979-02-28, which mentions a compound: 37443-42-8, mainly applied to chlorination photochem furancarboxylate; furancarboxylate tetrahydro chlorination; chlorotetrahydrofurancarboxylate, Synthetic Route of C6H10O3.

Photochem. chlorination of Me tetrahydro-2-furancarboxylate in CCl4 at -15 to -20° gave the chlorofurancarboxylate I and small amounts of the dihydrofuran II (8%) and Me 2-furancarboxylate (2%). Et tetrahydro-2-furancarboxylate was similarly chlorinated. The by-products were formed by dehydrochlorination of intermediate x-chlorination products.

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Benzisoxazole – Wikipedia,
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Computed Properties of C6H10O3. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Methyl tetrahydrofuran-2-carboxylate, is researched, Molecular C6H10O3, CAS is 37443-42-8, about Selective hydrogenolysis of 2-furancarboxylic acid to 5-hydroxyvaleric acid derivatives over supported platinum catalysts. Author is Asano, Takehiro; Takagi, Hiroshi; Nakagawa, Yoshinao; Tamura, Masazumi; Tomishige, Keiichi.

The conversion of 2-furancarboxylic acid (FCA), which is produced by oxidation of furfural, to 5-hydroxyvaleric acid (5-HVA) and its ester/lactone derivatives with H2 was investigated. Monometallic Pt catalysts were effective, and other noble metals were not effective due to the formation of ring-hydrogenation products. Supports and solvents had a small effect on the performance; however, Pt/Al2O3 was the best catalyst and short chain alcs. such as methanol were better solvents. The optimum reaction temperature was about 373 K, and at higher temperature the catalyst was drastically deactivated by deposition of organic materials on the catalyst. The highest yield of target products (5-HVA, δ-valerolactone (DVL), and Me 5-hydroxyvalerate) was 62%, mainly obtained as Me 5-hydroxyvalerate (55% yield). The byproducts were mainly ring-hydrogenation compounds (tetrahydrofuran-2-carboxylic acid and its ester) and undetected ones (loss of carbon balance). The catalyst was gradually deactivated during reuses even at a reaction temperature of 373 K; however, the catalytic activity was recovered by calcination at 573 K. The reactions of various related substrates were carried out, and it was found that the O-C bond in the O-C=C structure (1,2,3-position of the furan ring) is dissociated before C=C hydrogenation while the presence and position of the carboxyl group (or methoxy carbonyl group) much affect the reactivity.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 37443-42-8, is researched, Molecular C6H10O3, about Structural effects on rates and equilibriums. XVI. Effect of adjacent unshared electron pairs on ease of carbanion formation, the main research direction is carbanion formation structure effect.Quality Control of Methyl tetrahydrofuran-2-carboxylate.

The kinetics of NaOMe catalyzed D exchange of Me cyclopentanecarboxylate, two of its oxa derivatives and their acyclic analogs were studied in MeOD solution At 35° methyl cyclopentanecarboxylate exchanged 13 times as fast as Me α-ethylbutyrate, Me tetrahydro-2-furancarboxylate exchanged four times as fast as Me α-methoxybutyrate, and Me 1,3-dioxolane-2-carboxylate exchanged half as fast as Me dimethoxyacetate. From these results it was concluded that rates of carbanion formation may be decreased by repulsions between the unshared electron pairs of the carbanionic C atom and those of O atoms attached directly to it. Such repulsions may be minimized by appropriate rotation around the C-O bond in acyclic compounds but not as easily in cyclic compounds This electron repulsion effect operates in addition to the electronegativity effect, by which rates of formation of sp2-hybridized carbanions are slowed by highly electroneg. atoms attached directly to the site of carbanion formation. This interpretation of the results is analogous to that required to explain to explain recent observations on rates of pyramidal inversions at N and P.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Recommanded Product: Methyl tetrahydrofuran-2-carboxylate. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: Methyl tetrahydrofuran-2-carboxylate, is researched, Molecular C6H10O3, CAS is 37443-42-8, about An efficient synthesis of 3,4-dihydropyridone via a tandem olefin isomerization-ring-closing metathesis reaction. Author is Si, Chong; Fales, Kevin R.; Boyer, Robert D.; George Njoroge, F..

Novel 3,4-dihydropyridones were efficiently prepared via a tandem olefin isomerization-ring-closing metathesis reaction catalyzed by the second-generation Grubbs catalyst. The products were further functionalized at the 5-position, providing an interesting structural motif to be evaluated in medicinal chem.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Electric Literature of C6H10O3. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Methyl tetrahydrofuran-2-carboxylate, is researched, Molecular C6H10O3, CAS is 37443-42-8, about Palladium-catalyzed asymmetric hydrogenation of furan carboxylic acids.

Enantioselective hydrogenation of aromatic and heteroaromatic compounds is the field where chirally modified metal hydrogenation catalysts have the biggest potential compared to homogeneous chiral transition metal complexes. Here we report the hydrogenation of furan and benzofuran carboxylic acids over a cinchonidine-modified 5 wt% Pd/Al2O3 catalyst. (S)-Tetrahydrofuran-2-carboxylic acid was synthesized in 4 h at rt and 30 bar with 95% yield and 32% ee. The ee was lower in the hydrogenation of methylfuran carboxylic acids but up to 100% de was achieved. In the slow hydrogenation of benzofuran-2-carboxylic acid, the ee went up to 50% at 29% yield. The potential application of the method is limited by the competing hydrogenation of the quinoline rings of cinchonidine in the latter reaction, necessitating the feeding of small amounts of cinchonidine during reaction. Still, this simple method using an easily available chiral modifier and catalyst affords the highest rate and ee reported so far in the catalytic asym. hydrogenation of furan and benzofuran carboxylic acids, and it may be an attractive route in combination with optical resolution We assume that the reaction mechanism is analogous to that described for α,β-unsaturated carboxylic acids over the same catalyst, involving a 1:2-type interaction between the cinchonidine and the acid dimer.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Asymmetric hydrolysis of 2-hydroxy-carboxylic esters using recombinant Escherichia coli, published in 2007-10-10, which mentions a compound: 37443-42-8, mainly applied to whole cell kinetic resolution ester stereoselective, Related Products of 37443-42-8.

Optically active 2-hydroxy-carboxylates are important compounds for their use as intermediates in the synthesis of pharmaceuticals and stereoblock polymers. Enterobacter sp. DS-S-75 and the recombinant Escherichia coli harboring the 4-chloro-3-hydroxybutyrate (CHB) hydrolase gene from the strain DS-S-75 showed asym. hydrolytic activity towards 2-hydroxy-carboxylates, as well as towards CHB. It was discussed that the hydroxyl group in the substrate was particularly important for the asym. hydrolytic activity of the CHB hydrolase, and as such, it was re-designated to EnHCH (hydroxy-carboxylic ester hydrolase derived from Enterobacter sp.). Using the recombinant cell, both the reaction rate and the concentration of the substrates were significantly improved upon when compared to that of DS-S-75. Optically active 2-hydroxy-carboxylates could be synthesized on a practical basis for industrial production in this report.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

SDS of cas: 37443-42-8. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Methyl tetrahydrofuran-2-carboxylate, is researched, Molecular C6H10O3, CAS is 37443-42-8, about Hydrogenation and esterification of α-furancarboxylic acid over Ru-Pd/γ-Al2O3 catalyst. Author is Li, Zheqi; Jiang, Wenfeng; Wang, Huilong.

Me tetrahydro-α-furancarboxylate was prepared by esterification and hydrogenation of α-furancarboxylic acid using Ru-Pd/γ-Al2O3 as catalyst in fixed bed microreactor by a one-step process. Under optimum conditions, the product yield reached 97.2%. The catalyst activity did not deteriorate after 400 h.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Synthesis of N-(2-tetrahydrofuroyl)piperazine, published in 1999-12-31, which mentions a compound: 37443-42-8, mainly applied to hydrofuroylpiperazine preparation, Application of 37443-42-8.

Title compound I (R = 1-piperazyl) was prepared with 61% yield from condensation of I (R = OCH3), prepared from H2/Ni reduction of 2-methoxycarbonylfuran, with piperazine·6H2O in the presence of NH4Br under reflux for 6 h.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics