Day: April 13, 2022

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Ultrasonic Cavitation Facilitates Rapid Synthesis of Trisubstituted Pyrazole Scaffolds through Michael Addition/Domino Cyclization, published in 2019, which mentions a compound: 3326-71-4, Name is 2-Furoic hydrazide, Molecular C5H6N2O2, Product Details of 3326-71-4.

A series of aryl/indolyl substituted 4, 5-dihydro-1H-pyrazole derivatives I [R = 2-benzyloxybenzene, 4-MeSC6H4, 4-ClC6H4, 1-methyl-indolyl; R1 = Ph, 4-MeOC6H4, 4-FC6H4, etc.; Ar = 2-furyl, 4-pyridyl, 4-ClC6H4, etc.] was synthesized via a domino method based on Michael addition mediated cyclization of chalcones and aryl hydrazines. The chalcones were prepared by Wittig reaction in which substituted aromatic aldehydes were treated with stable ylides under eco-friendly ultrasonic cavitation.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Kinetic and mechanistic analysis of oxidation of 2-furoic hydrazide by hexachloroirradate(IV) in a wide pH range, the main research direction is furoic hydrazide hexachloroiridate catalyst oxidation mechanism kinetics.SDS of cas: 3326-71-4.

Oxidation of 2-furoic hydrazide (FH) by hexachloroiridate(IV) ([IrCl6]2-) was studied kinetically in a wide pH range in aqueous solution of 1.0 M ionic strength. The oxidation reaction followed well-defined second-order kinetics: – d[IrCl62-]/dt = k'[FH]tot[IrCl62-], where [FH]tot denotes the total concentration of FH and k’ stands for the observed second-order rate constants The established k’-pH profile displays that k’ increases drastically with pH and a plateau region exists between pH 4 and 6. A stoichiometric ratio of Δ[FH]tot/Δ[IrCl62-] = 1/4 was revealed by spectrophotometric titrations 1H NMR spectroscopic studies indicated that FH was cleanly oxidized to 2-furoic acid. The kinetic data suggest a reaction mechanism in which all the three protolysis species of FH react with [IrCl6]2- in parallel, forming the rate-determining steps. Two stabilized hydrazyl radicals are generated in the rate-determining steps, in which a single electron is transferred to [IrCl6]2-. The two hydrazyl radicals react rapidly in consecutive steps requiring 3 mol of Ir(IV) to form 2-furoic acid as the final product. Rate constants of the rate-determining steps were deduced through a simulation of the rate expression to the k’-pH dependency data. Values of these rate constants demonstrate that the three protolysis species of FH have a huge reactivity span, changing by about 109 times toward reduction in [IrCl6]2- and that FH can be readily oxidized in neutral and basic media. Rapid scan spectra and the measured activation parameters suggest that an outer-sphere electron transfer is probably taking place in each of the rate-determining steps. This is the first kinetic study on the oxidation reactions of FH and provides concurrently the protolysis constants of FH (pKa1 = 3.04 ± 0.08 and pKa2 = 11.6 ± 0.1) at 25.0 °C and 1.0 M ionic strength.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Synthetic Route of C8H12O4. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: cis-Cyclohexane-1,2-dicarboxylic acid, is researched, Molecular C8H12O4, CAS is 610-09-3, about Reductive metabolism and its role in the disposition of the hydroxamic angiotensin-converting enzyme inhibitor idrapril calcium in rat. Author is Lippi, A.; Criscuoli, M.; Canali, S.; Subissi, A..

The metabolism of 14C-idrapril calcium, the prototype of a new class of angiotensin-converting enzyme inhibitors, was studied in rat after a single i.v. administration. Plasma, urine, feces, and bile were assayed for total and HPLC-fractionated radioactivity. Only one major metabolite (M1, 2-sarcosinamide-cis-1,2-cyclohexanedicarboxylamide) was observed, along with idrapril, in plasma. Three metabolites (M1, M2, cis-1,2-cyclohexanedicarboxylic acid, and M3, and glucuronate derivative of M1) were present in 0-8-h urine, unchanged idrapril being the most abundant product. In bile, two metabolites (M1, M3), but not the parent compound, were found. In conclusion i.v. idrapril undergoes hepatic reduction to M1 and hydrolysis to M2. M1 can be glucuronated to M3 and both are partially excreted in the bile and further processed in the gut to reabsorbable radioactive species.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

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.Yadav, Neetu; Kumar, Raj; Singh, Ashok Kumar; Mohiyuddin, Shanid; Gopinath, P. researched the compound: 2-Furoic hydrazide( cas:3326-71-4 ).Electric Literature of C5H6N2O2.They published the article 《Systematic approach of chromone skeleton for detecting Mg2+, ion: Applications for sustainable cytotoxicity and cell imaging possibilities》 about this compound( cas:3326-71-4 ) in Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy. Keywords: chromone skeleton fluorophore magnesium fluorescence imaging; Biocompatible; Chromone based ligands; Cytotoxicity; HeLa cancer cells. We’ll tell you more about this compound (cas:3326-71-4).

The systematic studies of chromone appended novel chemosensors, favored to Mg2+ ion detection, these were analyzed and characterized by different spectroscopic techniques such as NMR, mass spectroscopy, FTIR and optical techniques. The binding demeanor of the ligands was executed with the library of metal ions and shown the good coordination with Mg2+ ion to the ligand′s cavity. Both ligands demonstrated good binding behavior with Mg2+ ion. The ligands represented 1: 1 stoichiometry with Mg2+ ions through Job′s plot. The low limit of detection of Mg2+ ion was determined as 2.56 × 10-6 and 1.28 × 10-6 for La and Lb, resp. No interference was occurred in Inference study by foreign metal ions that supported the specific detection of Mg2+ ion among the other metal ions. Further, the cytotoxicity assay test of these chromone appended ligands revealed that both ligands and their resp. compound with Mg2+ ion shown negligible toxicity with HeLa cancer cell line. Further, due to the fluorescence properties of the ligands, with or without Mg2+ ion was successfully tested in bioimaging experiment of HeLa cancer cell lines and found that ligands with Mg2+ ions represented good imaging with HeLa cancer cell.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Application of 3326-71-4. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Tin-Mediated One-pot Preparation of β-Trifluoromethyl-β-acylhydrazonyl Carbonyl Compounds. Author is Wang, Ke-Hu; Shi, Baobao; Wang, Yalin; Wang, Jianglong; Huang, Danfeng; Su, Yingpeng; Hu, Yulai.

A concise and efficient protocol for the preparation of β-trifluoromethyl-β-acylhydrazonyl carbonyl compounds was developed from multicomponent one-pot reactions of trifluoroacetaldehyde Me hemiacetal, acylhydrazines and 2-bromocarbonyl compounds in the presence of tin powder. The reactions can be carried out under mild reaction conditions to give the products in good to excellent yields.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 37443-42-8, is researched, SMILESS is O=C(C1OCCC1)OC, Molecular C6H10O3Journal, Journal of the American Chemical Society called Structural effects on rates and equilibriums. XVI. Effect of adjacent unshared electron pairs on ease of carbanion formation, Author is Hine, Jack; Dalsin, Philip D., the main research direction is carbanion formation structure effect.Computed Properties of C6H10O3.

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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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: cis-Cyclohexane-1,2-dicarboxylic acid, is researched, Molecular C8H12O4, CAS is 610-09-3, about The effects of cis-trans configuration of cyclohexane multi-carboxylic acids on colloidal forces in dispersions: steric, hydrophobic and bridging, the main research direction is configuration effect cyclohexanecarboxylic acid zirconia colloidal force; yield stress pH zirconia cyclohexanecarboxylic acid configuration effect.COA of Formula: C8H12O4.

The effects of cis- and trans-1,2-, trans-1,4-cyclohexanedicarboxylic acid, 95% cis-1,3,5-cyclohexane tricarboxylic acid and cis-1,2,3,4,5,6-cyclohexanehexacarboxylic acid on the yield stress-pH behavior of concentrated ZrO2 dispersions are reported. Adsorbed cis-1,2,3,4,5,6-cyclohexanehexacarboxylic acid imparts predominantly steric interactions. It forms a steric barrier keeping the interacting particles apart. Adsorbed cis- and trans-1,2 increase the maximum yield stress and this was attributed to a hydrophobic force resulting from the part of the cyclohexane ring sticking out into the solution which is devoid of charged or hydrophilic group. Adsorbed trans-1,4 increases the maximum yield stress by ≥3-fold and its configuration favors strong bridging interaction with an adjacent particle. Predominantly, cis-1,3,5 also increases the maximum yield stress but only by 60% at the same additive concentration This was attributed to a smaller degree of bridging.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Computed Properties 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 Electrochemical fluorination of several esters derived from oxolane-2-yl-carboxylic acid, oxolane-2-yl-methanol and oxane-2-yl-methanol.

Electrochem. fluorination (ECF) of ester derivatives of (tetrahydro-2-furanyl)carboxylic acid (I), (tetrahydro-2-furanyl)methanol (II) and (2-oxanyl)methanol (III) were investigated. Perfluoro oxolane carbonyl fluoride was obtained from derivatives of I and II, and perfluoro(oxane-2-yl-carbonyl fluoride) was obtained from derivatives of III as the desired compounds, resp. From the ECF of acetates, perfluoro-spiro-ether derivatives having a dioxolane ring were also obtained as the cyclization product in low yield together with a perfluoro acid fluoride. The structure of these perfluoro-spiro-ether derivatives was confirmed by analyzing the chlorinated products, which were obtained by the reaction with AlCl3.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Electric Literature of C5H6N2O2. 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: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Facile synthesis of 1,3,4-oxadiazoles via iodine promoted oxidative annulation of methyl-azaheteroarenes and hydrazides.

An oxidative sp3 C-H bond of methyl-azaheteroarenes protocol RCH3 (R = quinolin-2-yl, benzo[f]quinolin-3-yl, pyridin-2-yl, etc.) was reported for the synthesis of 1,3,4-oxadiazoles I (R1 = 2H-1,3-benzodioxol-5-yl, furan-2-yl, prop-1-en-2-yl, etc.) via [4+1] annulation with hydrazides R1C(O)NHNH2. This protocol enables 1,3,4-oxadiazole and quinoline linked diheterocycles I via selective oxidation of sp3 C-H bond of methyl-azaheteroarenes in the presence of I2-DMSO. The reaction has a broad substrate scope and good functional group tolerance for methyl-azaheteroarenes and hydrazides.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

Quality Control of 2-Furoic hydrazide. 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: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Water-Soluble Dioxidovanadium(V) Complexes of Aroylhydrazones: DNA/BSA Interactions, Hydrophobicity, and Cell-Selective Anticancer Potential. Author is Sahu, Gurunath; Banerjee, Atanu; Samanta, Rajib; Mohanty, Monalisa; Lima, Sudhir; Tiekink, Edward R. T.; Dinda, Rupam.

Five new anionic aqueous dioxidovanadium(V) complexes, [{VO2L1,2}A(H2O)n]α (1-5), with the aroylhydrazone ligands pyridine-4-carboxylic acid (3-ethoxy-2-hydroxybenzylidene)hydrazide (H2L1) and furan-2-carboxylic acid (3-ethoxy-2-hydroxybenzylidene)hydrazide (H2L2) incorporating different alkali metals (A = Na+, K+, Cs+) as countercation were synthesized and characterized by various physicochem. techniques. The solution-phase stabilities of 1-5 were determined by time-dependent NMR and UV-visible, and also the octanol/water partition coefficients were obtained by spectroscopic techniques. X-ray crystallog. of 2-4 confirmed the presence of vanadium(V) centers coordinated by two cis-oxido-O atoms and the O, N, and O atoms of a dianionic tridentate ligand. To evaluate the biol. behavior, all complexes were screened for their DNA/protein binding propensity through spectroscopic experiments Finally, a cytotoxicity study of 1-5 was performed against colon (HT-29), breast (MCF-7), and cervical (HeLa) cancer cell lines and a noncancerous NIH-3T3 cell line. The cytotoxicity was cell-selective, being more active against HT-29 than against other cells. In addition, the role of hydrophobicity in the cytotoxicity was explained in that an optimal hydrophobicity is essential for high cytotoxicity. Moreover, the results of wound-healing assays indicated antimigration in case of HT-29 cells. Remarkably, 1 with an IC50 value of 5.42 ± 0.15μM showed greater activity in comparison to cisplatin against the HT-29 cell line.

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Reference:
Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics