Day: April 7, 2022

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.Asano, Takehiro; Nakagawa, Yoshinao; Tamura, Masazumi; Tomishige, Keiichi researched the compound: Methyl tetrahydrofuran-2-carboxylate( cas:37443-42-8 ).Computed Properties of C6H10O3.They published the article 《Hydrogenolysis of tetrahydrofuran-2-carboxylic acid over tungsten-modified rhodium catalyst》 about this compound( cas:37443-42-8 ) in Applied Catalysis, A: General. Keywords: rhodium tungsten oxide silica catalyst THF carboxylic acid hydrogenolysis; hydroxyvalerate derivative hydrogenolysis catalyst. We’ll tell you more about this compound (cas:37443-42-8).

Catalysts for reduction of tetrahydrofuran-2-carboxylic acid (THFCA), which can be synthesized from furfural via oxidation and hydrogenation, were explored among the combinations of noble metal and reducible metal oxide supported on SiO2. Rh-WOx/SiO2 catalysts showed activity in C-O hydrogenolysis at 2-position of THFCA (to δ-valerolactone and 5-hydroxyvaleric acid) and higher yield ratio of these C-O hydrogenolysis products to carboxylic acid hydrogenation products than other bimetallic catalysts. The activity of Rh-WOx/SiO2 catalysts was highest at W/Rh = 0.25 mol/mol. X-ray diffraction, TPR, CO adsorption and XAFS characterizations showed that the Rh-WOx/SiO2 (W/Rh = 0.25) catalyst contained Rh metal particles with surface modification with isolated W2+ oxide species. The mechanism that hydride-like species formed on Rh atom attacks the C atom at the α-position (2-position) of adsorbed carboxylate on W atom is proposed based on the similar kinetics and similar catalyst structure to Rh-MOx/SiO2 (M = Re, Mo) which is known to be active in THFA hydrogenolysis to 1,5-pentanediol.

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

SDS of cas: 3326-71-4. 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 A new fluorescent chemosensor for Al(III) detection with highly selective in aqueous solution and solid test paper. Author is Xiu, Deping; Shi, Junjie; Deng, Miaoran; Song, Huihua; Hao, Zhiqiang; Feng, Qi; Yu, Haitao.

A new fluorescent chemosensor (I) based on salicylaldehyde hydrazide was facilely synthesized through one-step reaction, which exhibited turn-on fluorescent response to Al(III) with 18-fold fluorescence enhancement in aqueous solution at pH 5.5. The binding stoichiometry of 1 toward Al(III) was in 1:1. High selectivity and sensitivity to Al(III) were achieved, which featured a detection limit of 67 nmol L-1 and a linear rang of 1-10 μmol L-1. More importantly, the sensing process could be also performed on solid test paper. After the addition of Al(III), a significant emission color change from yellow to cyan was observed by naked eye due to the intrinsic aggregation-induced emission (AIE) characteristic of 1.

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

Related Products of 37443-42-8. 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 Electrochemical fluorination of several esters derived from oxolane-2-yl-carboxylic acid, oxolane-2-yl-methanol and oxane-2-yl-methanol. Author is Abe, Takashi; Tamura, Masanori; Sekiya, Akira.

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

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Chemistry of mixed-ligand oxidovanadium(IV) complexes of aroylhydrazones incorporating quinoline derivatives: Study of solution behavior, theoretical evaluation and protein/DNA interaction.Safety of 2-Furoic hydrazide.

A series of eight hexacoordinated mixed-ligand oxidovanadium(IV) complexes [VO(Lx)(LN-N)] (1-8), where Lx = L1 – L4 are four differently substituted ONO donor aroylhydrazone ligands and LN-N are N,N-donor bases like 2,2′-bipyridine (bipy) (1, 3, 5 and 7) and 1,10-phenanthroline (phen) (2, 4, 6 and 8), are reported. All synthesized complexes were characterized by various physicochem. techniques and mol. structures of 1 and 6 were determined by x-ray crystallog. With a view to evaluate the biol. activity of the VIVO species, the behavior of the systems VIVO2+/Lx, VIVO2+/Lx/bipy and VIVO2+/Lx/phen was studied as a function of pH in a mixture of H2O/DMSO 50/50 (volume/volume). DFT calculations allowed finding out the relative stability of the tautomeric forms of the ligands, and predicting the structure of vanadium complexes and their EPR parameters. To study their interaction with proteins, firstly the ternary systems VIVO2+/L1,2 with 1-methylimidazole, which is a good model for histidine binding, were examined Subsequently the interaction of the complexes with lysozyme (Lyz), cytochrome c (Cyt) and bovine serum albumin (BSA) was studied. The complexes showed moderate binding affinity towards BSA, while no interaction takes place with lysozyme and cytochrome c. This could be explained with the higher number of accessible coordinating and polar residues for BSA than for Lyz and Cyt. Further, the complexes were also evaluated for their DNA binding propensity through UV-visible absorption titration and fluorescence spectral studies. These results were consistent with BSA binding affinity and showed moderate binding affinity towards CT-DNA.

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

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 Direct Catalytic Symmetrical, Unsymmetrical N,N-Dialkylation and Cyclization of Acylhydrazides Using Alcohols, published in 2020-08-21, which mentions a compound: 3326-71-4, Name is 2-Furoic hydrazide, Molecular C5H6N2O2, Synthetic Route of C5H6N2O2.

Herein, direct N,N-dialkylation of acylhydrazides using alcs. is reported. This catalytic protocol provides one-pot synthesis of both sym. and unsym. N,N-disubstituted acylhydrazides using an assortment of primary and secondary alcs. with remarkable selectivity and excellent yields. Interestingly, the use of diols resulted in intermol. cyclization of acylhydrazides, and such products are privileged structures in biol. active compounds Water is the only byproduct, which makes this catalytic protocol sustainable and environmentally benign.

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

Computed Properties of C6H10O3. 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: Methyl tetrahydrofuran-2-carboxylate, is researched, Molecular C6H10O3, CAS is 37443-42-8, about Low Temperature Chlorine-Initiated Oxidation of Small-Chain Methyl Esters: Quantification of Chain-Terminating HO2-Elimination Channels. Author is Muller, Giel; Scheer, Adam; Osborn, David L.; Taatjes, Craig A.; Meloni, Giovanni.

Cl-initiated oxidation reactions of three small-chain Me esters, Me propanoate (CH3CH2COOCH3; MP), Me butanoate (CH3CH2CH2COOCH3; MB), and Me valerate (CH3CH2CH2CH2COOCH3; MV), are studied at 1 or 8 Torr and 550 and 650 K. Products are monitored as a function of mass, time, and photoionization energy using multiplexed photoionization mass spectrometry coupled to tunable synchrotron photoionization radiation. Pulsed photolysis of mol. chlorine is the source of Cl radicals, which remove an H atom from the ester, forming a free radical. In each case, after addition of O2 to the initial radicals, chain-terminating HO2-elimination reactions are observed to be important. Branching ratios among competing HO2-elimination channels are determined via absolute photoionization spectra of the unsaturated Me ester coproducts. At 550 K, HO2-elimination is observed to be selective, resulting in nearly exclusive production of the conjugated Me ester coproducts, Me propenoate, methyl-2-butenoate, and methyl-2-pentenoate, resp. However, in MV, upon raising the temperature to 650 K, other HO2-elimination pathways are observed that yield Me 3-pentenoate and Me 4-pentenoate. In each Me ester oxidation reaction, a peak is observed at a mass consistent with cyclic ether formation, indicating chain-propagating OH loss/ring formation pathways via QOOH intermediates. Evidence is observed for the participation of resonance-stabilized QOOH in the most prominent cyclic ether pathways. Stationary point energies for HO2-elimination pathways and select cyclic ether formation channels are calculated at the CBS-QB3 level of theory and assist in the assignment of reaction pathways and final products.

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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: 610-09-3, is researched, SMILESS is O=C([C@H]1[C@@H](C(O)=O)CCCC1)O, Molecular C8H12O4Journal, Journal of Inorganic and Organometallic Polymers and Materials called Synthesis, Structures, and Catalytic Properties of Three New Metal-Organic Coordination Polymers Constructed from Flexible Benzimidazole-Based and cis-1,2-Cyclohexanedicarboxylate Synthons, Author is Ming, Chun-Lun; Hao, Zeng-Chuan; Yu, Bao-Yi; Van Hecke, Kristof; Cui, Guang-Hua, the main research direction is crystal structure benzimidazole cobalt zinc silver cyclohexanedicarboxylate coordination polymer; mol structure benzimidazole cobalt zinc silver cyclohexanedicarboxylate coordination polymer.Safety of cis-Cyclohexane-1,2-dicarboxylic acid.

Three metal-organic coordination polymers {[Co(pbmb)(chadc)]·2H2O}n (1), {[Zn(pbmb)(chadc)]·2H2O}n (2), and [Ag(pbmb)(chadc)]n (3) (pbmb = 1,1′-(1,3-propanediyl)bis(2-methylbenzimidazole), chadc = cis-1,2-cyclohexanedicarboxylate anion), were hydrothermally synthesized by self-assembly of a flexible bis(2-methylbenzimidazole) ligand and one dicarboxylate anion with three kinds of metal salts. All the compounds were characterized by single-crystal x-ray diffraction and physicochem. spectroscopic methods. Complexes 1 and 2 possess a 1-dimensional sequence of fused rings and 3 shows a 1-dimensional helical chain structure, which are bridged by pbmb and chadc ligands. Complex 2 and 3 are further packed into 2-dimensional and 3-dimensional supramol. architectures by diverse π-π interactions, resp. The study as heterogeneous catalyst in a Fenton-like process for 1-3 reveals different performances. The fluorescence properties of 1-3 were studied in the solid state.

Compound(610-09-3)Safety of cis-Cyclohexane-1,2-dicarboxylic acid received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(cis-Cyclohexane-1,2-dicarboxylic acid), if you are interested, you can check out my other related articles.

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

Sennappan, M.; Murali Krishna, P.; Hari Krishna, R. published an article about the compound: 2-Furoic hydrazide( cas:3326-71-4,SMILESS:O=C(C1=CC=CO1)NN ).Computed Properties of C5H6N2O2. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:3326-71-4) through the article.

The present work describes the synthesis of novel (E)-furan-2-yl(2-(2-hydroxybenzylidene)hydrazinyl) methaniminium in water/methanol(3:1) mixture, water acting as catalyst and also solvent to expedite reaction rate with high yield. In which, amine exchange and condensation reaction takes place between N-salicylidene aniline and furanoic acid hydrazide at one step. The structural characterization of prepared ligand was carried out by single crystal x-ray diffraction, elemental anal. and spectroscopy (UV-visible, FTIR and NMR) techniques. The single crystal x-ray diffraction result indicates that the ligand crystallizes in orthorhombic system with Pca21 space group. Further, Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) complexes of ligand were prepared Complexes were analyzed by elemental anal., magnetic susceptibility and spectroscopy (UV-visible, FTIR and ESR) studies. The DNA binding studies of synthesized compounds were carried out and results suggest that, ligand L and its transition metal complexes 1-6 were binding to CT-DNA through intercalation. It was confirmed by intrinsic binding constant value in the order of 106 M-1. The fluorescence properties of ligand L and its metal complexes 1-6 were investigated; ligand showed broad emission spectra in the visible region and its metal complexes exhibited emission spectra in the blue to red.

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

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 2-Furoic hydrazide(SMILESS: O=C(C1=CC=CO1)NN,cas:3326-71-4) is researched.Recommanded Product: 35621-01-3. The article 《Investigation of DNA interaction and antiproliferative activity of mixed ligand dioxidomolybdenum(VI) complexes incorporating ONO donor aroylhydrazone ligands》 in relation to this compound, is published in Polyhedron. Let’s take a look at the latest research on this compound (cas:3326-71-4).

Four new mixed ligand dioxidomolybdenum(VI) [MoVIO2L1-3(Q)] (1-3), [MoVIO2L4(Q)]2 (H2O) (4) [where Q = MeOH for 1 and imidazole for 2-4] complexes were synthesized using four different ONO donor aroylhydrazone ligands (H2L1-4). All the derived ligands and complexes were characterized by different physicochem. techniques, i.e., elemental anal., spectroscopic methods (UV-Vis, NMR and IR), and cyclic voltammetry. The mol. geometries of 1-4 were established by X-ray crystallog. which reveals the Schiff base ligands coordinate – the distorted octahedral metal centers in a di-neg. tridentate fashion. The complexes indicated moderate binding affinity (103 to 104 M-1) towards CT-DNA. Further, in vitro cytotoxicity activity of all the complexes were determined against HT-29 (colon cancer) and HeLa (cervical cancer) cell lines. Complex 4, due to the presence of a heterocyclic 2-hydroxy-1-naphthyl moiety in the ligand backbone, was found to be more biol. active in comparison to the others in the series.

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

Abe, Takashi; Tamura, Masanori; Sekiya, Akira published the article 《Electrochemical fluorination of several esters derived from oxolane-2-yl-carboxylic acid, oxolane-2-yl-methanol and oxane-2-yl-methanol》. Keywords: electrochem fluorination furanmethanol pyranmethanol cyclopentanemethanol; oxolane carbonyl fluoride preparation electrochem fluorination; fluoro spiro ether oxolane carbonyl fluoride preparation electrochem fluorination; oxolanemethanol electrochem fluorination.They researched the compound: Methyl tetrahydrofuran-2-carboxylate( cas:37443-42-8 ).Related Products of 37443-42-8. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:37443-42-8) here.

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.

Compound(37443-42-8)Related Products of 37443-42-8 received a lot of attention, and I have introduced some compounds in other articles, similar to this compound(Methyl tetrahydrofuran-2-carboxylate), if you are interested, you can check out my other related articles.

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