Tag: M.W:100-200

Quality Control of 2-Furoic hydrazide. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 2-Furoic hydrazide, is researched, Molecular C5H6N2O2, CAS is 3326-71-4, about Synthetic stratagem, characterization and biocidal applications of triorganotin(IV) complexes derived from hydrazide/hydrazone analogues. Author is Mehmood, Mehwish; Imtiaz-ud-Din; Nawaz Tahir, Muhammad; Haq, Ihsan-ul; Zahra, Syeda Saniya.

A series of Schiff base ligands as benzylidene benzohydrazide and their hydrazone analogs (Ia-Ic) have been synthesized and then complexed with organotin(IV) moiety having general formula [R’3SnL] to get the target compounds (1-9), where L = C4H3OCONHN:CHR, R = C6H5O (Ia), C4H5O (Ib), C6H3Cl2 (Ic) and R’ = -CH3 (1-3), -CH2Ph (4-6), -Ph (7-9). They were fully characterized using FT-IR, NMR (1H, 13C and 119Sn) spectroscopy, along with elemental anal. and m.p. One of the precursor (Ib) has been analyzed by single crystal XRD to further authenticate the structure. The 119Sn NMR data suggest the mol. geometry of organotin derivatives as distorted pentagonal bipyramidal. They were also evaluated for their antibacterial, antifungal, α-amylase inhibition, DPPH, total reducing power and total antioxidant activities. Triaryltin(IV) derivatives show good antibacterial and antifungal activity. Whereas the data for antidiabetic activity demonstrated that the compounds may serve as moderately effective alpha amylase inhibitor.

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Benzisoxazole – Wikipedia,
Benzisoxazole – an overview | ScienceDirect Topics

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 2-Furoic hydrazide( cas:3326-71-4 ) is researched.Product Details of 3326-71-4.Beyzaei, Hamid; Ghanbari Kudeyani, Maryam; Samareh Delarami, Hojat; Aryan, Reza published the article 《Synthesis, antimicrobial and antioxidant evaluation, and molecular docking study of 4,5-disubstituted 1,2,4-triazole-3-thiones》 about this compound( cas:3326-71-4 ) in Journal of Molecular Structure. Keywords: triazole thione preparation docking antibacterial antifungal antioxidant activity. Let’s learn more about this compound (cas:3326-71-4).

In order to develop potential antimicrobial agents, some 1,2,4-triazole-3-thiones I (R = Et, Ph, 4-nitrophenyl, etc.; Ar = Ph, furan-2-yl, pyridin-4-yl, etc.) were synthesized from the reaction of hydrazides ArC(O)NHNH2 with isothiocyanates RN=C=S under optimized conditions in deep eutectic solvent of potassium carbonate-glycerol (1:5 M ratio). Blocking properties of all products were assessed on a variety of Gram-pos. and Gram-neg. bacterial as well as fungal pathogens. Good to excellent inhibitory effects especially against fungi were observed with all synthesized compounds Compound I (R = 4-nitrophenyl; Ar = 4-hydroxyphenyl) showed significant antioxidant activity according to the results obtained from 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging experiments The possible interaction mechanism of synthetic triazoles with 1IYL enzyme on Aspergillus fumigatus was investigated by mol. docking method. A complete agreement was found between exptl. data and theor. calculations Hydrogen bond acceptor strength of N-1 in 1,2,4-triazole rings was the main cause of the observed differences.

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Reference:
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: 3326-71-4, is researched, Molecular C5H6N2O2, about Crystal structure of N′-[4-(dimethylamino)benzylidene]furan-2-carbohydrazide monohydrate, the main research direction is furoic hydrazide dimethyl aminobenzaldehyde crystal structure; crystal structure; furoic acid; hydrazide; hydrazone.Electric Literature of C5H6N2O2.

The condensation of 2-furoic hydrazide and 4-dimethyl aminobenzaldehyde in ethanol yielded a yellow solid formulated as the title compound, C14H15N3O2·H2O. The crystal packing is stabilized by intermol. O(water)-H···O,N(carbohydrazide) and N-H···O(water) hydrogen bonds, which form a two-dimensional network along the bc plane. Addnl. C-H···O interactions link the mols. into a three-dimensional network. The dihedral angle between the mean planes of the benzene and the furan ring is 34.47 (6)°. The carbohydrazide moiety, i.e., the C=N-N-C=O fragment and the benzene ring are almost coplanar, with an angle of 6.75 (9)° between their mean planes.

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

Electric Literature 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 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 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

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, ChemistrySelect called Deciphering of Ligand-to-Metal Charge-Transfer Process: Synthesis, Spectroscopic and Theoretical Study, Author is Ghosh, Swadesh; Singharoy, Dipti; Naskar, Jnan Prakash; Bhattacharya, Subhash Chandra, which mentions a compound: 3326-71-4, SMILESS is O=C(C1=CC=CO1)NN, Molecular C5H6N2O2, Formula: C5H6N2O2.

Many reports on metal ion sensing applications are available in literature but the mechanism of selectivity is not clear. Here the synthesis and characterization of a Schiff base Furan-2-carboxylic acid pyren-1-ylmethylene-hydrazide (PYFH) has been described with selective detection of copper(II) metal ion among different metal ions by UV-vis, fluorescence and HRMS spectroscopic methods. The S2- ion (Na2S) was added to the PYFH:Cu2+ complex for checking reversibility of PYFH by fluorescence, fluorescence microscopic imaging and mol. logic gate construction (combination of NOT and OR gate). From the exptl. findings the reason for selectivity of Cu2+ metal ion among a series of metal ions is not clear. So, to explore the causes of selectivity of Cu2+ metal ion by PYFH, D. Functional Theory (DFT) calculation was conducted for free PYFH and various sets of metal ions individually with PYFH. From DFT calculation it was understandable that selectivity of PYFH towards Cu2+ ions occurred due to lowering of HOMO-LUMO energy of PYFH:Cu2+ composites (-8.46 & -5.80 eV) compared to free PYFH (-5.56 & -2.15 eV). Whereas energy of HOMO and LUMO with other metals ions (PYFH:Mn+) are ∼-5.50 and ∼-2.24 eV resp., as a result PYFH does not get any extra stability.

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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 Platinum(II) and palladium(II) complexes analogous to oxaliplatin with different cyclohexyldicarboxylate isomeric anions and their in vitro antitumour activity. Structural elucidation of [Pt(C2O4)(cis-dach)], the main research direction is cyclohexanediamine palladium platinum cyclohexyldicarboxylate complex preparation; antitumor activity palladium platinum cyclohexyldicarboxylate cyclohexanediamine complex; crystal structure platinum cyclohexyldicarboxylate cyclohexanediamine complex.Safety of cis-Cyclohexane-1,2-dicarboxylic acid.

Several new PtII and PdII complexes bearing the enantiomerically pure (1R,2R)-(-)-1,2-cyclohexanediamine (dach) ligand, [MX2{(1R,2R)-dach}], where M = Pt or Pd, X2 = cis- or trans- or (1R,2R)-1,2-cyclohexyldicarboxylate anions, were synthesized and characterized physicochem. and spectroscopically. These complexes were screened in vitro against the three tumor cell lines K562, HeLa and L929, and the results obtained were compared with those of the reference standards, cisplatin, carboplatin and oxaliplatin; the known antitumor drugs. The single crystal x-ray structure determination of the [Pt(C2O4)(cis-dach)] complex is discussed and compared with that of oxaliplatin, [Pt(C2O4){(1R,2R)-dach}].

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Reference:
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 Facile synthesis, characterization, nucleic acid interaction and photoluminescent properties of (E)-furan-2-yl(2-(2-hydroxybenzylidene)hydrazinyl) methaniminium and its Mn(II), Co(II), Ni(II), Cu(II), Zn(II) and Cd(II) complexes, published in 2019-02-15, which mentions a compound: 3326-71-4, mainly applied to transition metal furanyl hydroxybenzylidene hydrazinylmethaniminium complex preparation photoluminescence; DNA binding transition metal furanyl hydroxybenzylidene hydrazinylmethaniminium complex; EPR spectra transition metal furanyl hydroxybenzylidene hydrazinylmethaniminium complex, Recommanded Product: 3326-71-4.

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

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 Bulky Diarylammonium Arenesulfonates as Selective Esterification Catalysts, published in 2005-03-30, which mentions a compound: 37443-42-8, Name is Methyl tetrahydrofuran-2-carboxylate, Molecular C6H10O3, Quality Control of Methyl tetrahydrofuran-2-carboxylate.

More environmentally benign alternatives to current chem. processes, especially large-scale, fundamental reactions such as ester condensations, are highly desirable for many reactions. Bulky diarylammonium pentafluorobenzenesulfonates and tosylates serve as extremely active dehydration catalysts for the ester condensation reaction of carboxylic acids with equimolar amounts of sterically demanding alcs. and acid-sensitive alcs. Typically, the esterification reaction is performed in heptane by heating at 80 °C in the presence of 1 mol % of the catalyst without removing water. Esterification with primary alcs. proceeds without solvents even at room temperature Furthermore, 4-(N-mesitylamino)polystyrene resin-bound pentafluorobenzenesulfonate can be recycled more than 10 times without activity loss.

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

Name: cis-Cyclohexane-1,2-dicarboxylic acid. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: cis-Cyclohexane-1,2-dicarboxylic acid, is researched, Molecular C8H12O4, CAS is 610-09-3, about Solvolytic reactions of cyclic anhydrides in anhydrous acetic acid. Author is Haddadin, M. J.; Higuchi, T.; Stella, V..

The reversible reactions of several cyclic anhydrides with HOAc to form Ac2O and the corresponding dicarboxylic acid, catalyzed by HClO4 at 25°, were studied. The equilibrium constants calculated from spectral data, were 4.85 × 10-4, 1.08 × 10-1, and 4.6 × 10-1 M for succinic, trans-1,2-cyclohexanedicarboxyllic, and glutaric anhydrides, resp. Maleic, phthalic, and cis-1,2-cyclohexanedicarboxylic anhydrides did not undergo any detectable reaction with HOAc under these conditions, suggesting still higher stability. The reverse rate constants were relatively independent of the structure of the attacking diacid, while the forward rate constants were found to parallel the equilibrium constants The rate-determining step for the forward reaction appears to be the breakdown of the tetrahedral intermediate formed by the attack of HOAc mol. on the protonated cyclic anhydride.

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

Safety of Methyl tetrahydrofuran-2-carboxylate. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Methyl tetrahydrofuran-2-carboxylate, is researched, Molecular C6H10O3, CAS is 37443-42-8, about A scalable chemoenzymic preparation of (R)-tetrahydrofuran-2-carboxylic acid. Author is Fujima, Yoshito; Hirayama, Yoshihiro; Ikunaka, Masaya; Nishimoto, Yukifumi.

To develop a practical scalable approach to (R)-tetrahydrofuran-2-carboxylic acid (I), a chiral building block for furopenem, enantioselective hydrolysis of its esters is explored: When Et (±)-tetrahydrofuran-2-carboxylate (II, 2 M, 288 g/L) is digested by an Aspergillus melleus protease {0.2% (w/v)} in a 1.5 M potassium phosphate buffer (pH 8) for 20 h, enantioselective hydrolysis proceeds with E = 60 to give I in 94.4% ee. On separation from the leftover antipodal (S)-II by partition, I is treated with dicyclohexylamine in Me Et ketone/methanol (5:1) to precipitate the crystalline salt that contains I of >99% ee in 22% overall yield from II.

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