Category: 3724-19-4

Recommanded Product: 3-Pyridinepropionic acid. 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: 3-Pyridinepropionic acid, is researched, Molecular C8H9NO2, CAS is 3724-19-4, about 4f-Block Metal Complexes as Secondary Building Units in Preparing 4d-4f Coordination Polymers: Preparation, Structures, and Luminescent Properties of [Ln2L6(H2O)4]·{[Ln2L4(H2O)6](NO3)2} and {[AgLnL2(H2O)3](NO3)2(H2O)4} (L = 3-Pyridinepropionate, Ln = Eu, Tb, Nd). Author is Zheng, Zhen Nu; Jang, Young Ok; Lee, Soon W..

Three new 4d-4f metal-organic coordination polymers were prepared by using 4f-block metal complexes as secondary building units. Discrete 4f complexes, [Ln2L6(H2O)4]·{[Ln2L4(H2O)8](NO3)2} {Ln = Eu (1), Tb (2), Nd (3)}, were prepared by microwave-heating a mixture of Ln(NO3)3·nH2O, 3-pyridinepropionic acid (HL), and NaOH in H2O for 1 min. Compounds 1-3 were subsequently treated with AgNO3 to form three-dimensional Ag-Ln coordination polymers, [AgLnL2(H2O)3](NO3)2(H2O)4 {Ln = Eu (4), Tb (5), Nd (6)}. Compounds 1-3 are isostructural and consist of two dimers: a neutral dimer and an ionic dimer. In these compounds, the pyridyl N atoms of ligands do not coordinate to the Ln3+ ions. In isostructural coordination polymers 4-6, the pyridyl N atoms are bonded to soft Ag+ ions, and carboxylate O atoms are bonded to hard Ln3+ ions. Compounds 1 and 4 exhibit practically the same red luminescence in the solid state, and compounds 2 and 5 exhibit the green luminescence, but compounds 3 and 6 do not exhibit photoluminescence in the visible region.

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Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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 Economical and eco-friendly method for the reduction of heterocyclics possessing α,β-unsaturated acid systems using novel reduction method, published in 2014, which mentions a compound: 3724-19-4, mainly applied to aldehyde heteroaryl malonic acid condensation; acrylic acid heterocyclic preparation reduction palladium catalyst; propionic acid heterocyclic preparation green chem, Safety of 3-Pyridinepropionic acid.

Reduction of hetero aryl acrylic acid RHC=CHCO2H [R = 2-furanyl, 3-pyrazinyl, 3-quinolinyl] to hetero aryl propionic acids RCH2CH2CO2H was achieved using hydrazine hydrate and an oxidizing agent and yields were reported. Moreover, reduction of hetero aryl acrylic acids RHC = CHCO2H was also carried out using Palladium charcoal method and the yields of both the methods were compared. It was observed that though the yields were slightly less in hydrazine reduction method, the method appeared to be economical, eco-friendly with operational simplicity, reasonable yields and easy workup procedures, which may be applied to large scale synthesis.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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 Syntheses and structural characterization of three new coordination polymers of [Ag(PPIA)·H2O]n, [Cu(PPIA)2·2H2O]n and [Zn(PPIA)2(H2O)2]n; PPIA = 3-pyridinepropionic acid, published in 2006-11-03, which mentions a compound: 3724-19-4, mainly applied to silver pyridinepropionic acid coordination polymer preparation structure; copper pyridinepropionic acid coordination polymer preparation structure; zinc pyridinepropionic acid coordination polymer preparation structure; crystal structure transition metal pyridinepropionic acid coordination polymer, Recommanded Product: 3-Pyridinepropionic acid.

The syntheses and crystal structures of three new coordination polymers [Ag(PPIA)·H2O]n (PPIA = 3-pyridinepropionic acid) (1), [Cu(PPIA)2·2H2O]n (2), and [Zn(PPIA)2(H2O)2]n (3), are reported. The reactions of 3-pyridinepropionic acid with AgNO3, Cu(NO3)2·6H2O and Zn(NO3)2·6H2O in MeOH afforded complexes 1-3, resp. Single-crystal x-ray crystallog. structure determinations show that complexes 1, 2 and 3 crystallize in the space groups P1̅ , Pbca and P21/n, resp. The Ag(I) centers in 1 adopt a slightly distorted T-shaped geometry, while the Cu(II) centers in 2 exhibit a distorted square planer coordination geometry and the Zn(II) centers in 3 adopt a distorted octahedral coordination geometry. The metal centers in 1-3 coordinate to both the pyridyl and carboxylate groups to form 1-dimensional polymeric chains and two-dimensional framework structures, resp. The 1-dimensional chain complex of 1 or the two-dimensional frameworks of 2 and 3 are also linked to form three-dimensional networks through H bonds.

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Imidazole – Wikipedia,
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Recommanded Product: 3-Pyridinepropionic acid. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 3-Pyridinepropionic acid, is researched, Molecular C8H9NO2, CAS is 3724-19-4, about Copper-Catalyzed Decarboxylative Radical Silylation of Redox-Active Aliphatic Carboxylic Acid Derivatives. Author is Xue, Weichao; Oestreich, Martin.

A decarboxylative silylation of aliphatic N-hydroxyphthalimide (NHPI) esters using Si-B reagents as silicon pronucleophiles is reported. This C(sp3)-Si cross-coupling is catalyzed by copper(I) and follows a radical mechanism, even with exclusion of light. Both primary and secondary alkyl groups couple effectively, whereas tertiary alkyl groups are probably too sterically hindered. The functional-group tolerance is generally excellent, and α-heteroatom-substituted substrates also participate well. This enables, for example, the synthesis of α-silylated amines starting from NHPI esters derived from α-amino acids. The new method extends the still limited number of C(sp3)-Si cross-couplings of unactivated alkyl electrophiles.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Preparation of 3-(2-hydroxyethyl)pyridine》. Authors are Dornow, Alfred; Schacht, Wilhelm.The article about the compound:3-Pyridinepropionic acidcas:3724-19-4,SMILESS:OC(=O)CCC1=CC=CN=C1).Computed Properties of C8H9NO2. Through the article, more information about this compound (cas:3724-19-4) is conveyed.

Attempts to prepare 3-(2-hydroxyethyl)-2-methylpyridine analogous to the 5-(2-hydroxyethyl)-4-methylthiazole component of vitamin BI (I) from the corresponding 3-AcOCH2CO compound by Clemmensen reduction had given the (1-hydroxyethyl) compound, which, as well as 3-(1-hydroxyethyl)pyridine itself, yielded with the pyrimidine component of I compounds (II) having I activity in the pigeon test (C.A. 34, 5845.5). Since the (1-hydroxyethyl) isomer of I showed no aneuritic action (C.A. 37, 3091.5) it was to be expected that the (2-hydroxyethyl) isomers of compounds of this type would have increased vitamin activity. 1-(4-Amino-2-methyl-5-pyrimidylmethyl)-3-(2-hydroxyethyl)pyridinium chloride-HCl (III) was accordingly prepared by the following series of reactions. Quinolinic acid nitrate, C7H5NO4.HNO3, m. 152-4° (from dilute HNO3), prepared quantitatively from 8-hydroxyquinoline and HNO3 (d. 1.4) at 0-5°, was converted by heating 3 hrs. at 200-10° into nicotinic acid, m. 224-6° (85-90%), thence through the Me ester and hydrazide into the phenylsulfonylhydrazide which, decomposed with Na2CO3 in glycerol at 160°, gave, along with Ph2S2, 36% 3-pyridinecarboxaldehyde, b18 88-90°; this, heated 2 hrs. on the water bath with 1 mol. CH2(CO2H)2 in pyridine and a couple drops of piperidine, yielded 90-5% 3-pyridineacrylic acid, quantitatively hydrogenated by Pt oxide in water in 6-8 hrs. to 3-pyridinepropionic acid, m. 160-2° (from alc. or much AcOEt); Me ester (75-80% by refluxing the acid 3 hrs. in MeOH-concentrated H2SO4), b12 134.2-4.4°; amide (quant. yield from the ester allowed to stand several hrs. with 5 volumes concentrated NH4OH), prisms from acetone, m. 118-19°, converted by Br and KOH on the water bath into 3-(2-aminoethyl)pyridine, b14 115.0-15.4°, very hygroscopic and sensitive to CO2 (dipicrate, leaflets or needles from water, m. 211-12°; HCl salt, m. 204-5° (from alc. or alc.-acetone)); treated in ice-cold N H2SO4 with NaNO2 and heated on the water bath, the amine gave 75-80% 3-(2-hydroxyethyl)pyridine, b10 144.0-4.5° (urethan, scales from water, m. 100-2°), which, heated with 4-amino-5-(chloromethyl)-2-methylpyrimidine-HCl in PhNO2 1 hr. at 40°, gave 45-8% III, druses with 1 H2O from MeOH-Me2CO, m. 212-14°. Physiol. tests on III will be reported later.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

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: 3724-19-4, is researched, Molecular C8H9NO2, about Isoelectric focusing using non-amphoteric buffers in free solution: III. Separation of amino acids, the main research direction is isoelec focusing apparatus model; amino acid separation isoelec focusing.SDS of cas: 3724-19-4.

A multicompartment apparatus (Wenger, P.; Javet, P., 1986) was used, and pH profiles stabilized by simple nonamphoteric buffers (HOAc and NaOAc, Wenger, P.; Javet, P., 1986) were studied. Mixtures of 2 amino acids were separated to test this device. A theor. model comprising one dimensionless separation parameter is proposed to characterize these separations This model allows one to calculate the purity of the recovered amino acids, the yield of a separation at steady-state or the time necessary to obtain a given concentration of an amino acid in one of the compartments of the isoelec. focusing cell. The separation parameter contains the phys. parameters which intervene in the elec. migration and in the diffusion. Values of this separation parameter have been exptl. determined for 3 amino acids under various exptl. conditions. The results confirm the usefulness of this model in designing a multicompartment isoelec. focusing apparatus

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Imidazole – Wikipedia,
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SDS of cas: 3724-19-4. 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: 3-Pyridinepropionic acid, is researched, Molecular C8H9NO2, CAS is 3724-19-4, about An Anionic, Chelating C(sp3)/NHC ligand from the Combination of an N-heterobicyclic Carbene and Barbituric Heterocycle. Author is Benaissa, Idir; Gajda, Katarzyna; Vendier, Laure; Lugan, Noel; Kajetanowicz, Anna; Grela, Karol; Michelet, Veronique; Cesar, Vincent; Bastin, Stephanie.

The coordination chem. of the anionic NHC 1- based on an imidazo[1,5-a]pyridin-3-ylidene (IPy) platform substituted at the C5 position by an anionic barbituric heterocycle was studied with d6 (Ru(II), Mn(I)) and d8 (Pd(II), Rh(I), Ir(I), Au(III)) transition-metal centers. While the anionic barbituric heterocycle is planar in the zwitterionic NHC precursor 1·H, NMR spectroscopic analyses supplemented by x-ray diffraction studies evidenced the chelating behavior of ligand 1- through the carbenic and the malonic C atoms in all of the complexes, resulting from a deformation of the lateral barbituric heterocycle. The complexes were obtained by reaction of the free carbene with the appropriate metal precursor, except for the Au(III) complex 10, which was obtained by oxidation of the antecedent Au(I) complex [AuCl(1)]- with PhICl2 as an external oxidant. During the process, the kinetic Au(I) intermediate 9 resulting from the oxidation of the malonic C of the barbituric moiety was isolated upon crystallization from the reaction mixture The νCO stretching frequencies recorded for complex [Rh(1)(CO)2] (5) demonstrated the strong donating character of the malonate-C(sp3)/NHC ligand 1-. The Ru complex [Ru(1)Cl(p-cymene)] (11) was implemented as a precatalyst in the dehydrogenative synthesis of carboxylic acid derivatives from primary alcs. and exhibited high activities at low catalyst loadings (25-250 ppm) and a large tolerance toward functional groups.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 3-Pyridinepropionic acid( cas:3724-19-4 ) is researched.Name: 3-Pyridinepropionic acid.Hunter, Christopher A.; Misuraca, Maria Cristina; Turega, Simon M. published the article 《Dissection of Complex Molecular Recognition Interfaces》 about this compound( cas:3724-19-4 ) in Journal of the American Chemical Society. Keywords: zinc porphyrin association constant pyridylcarboxylate pyridylphosphonate hydrogen bond. Let’s learn more about this compound (cas:3724-19-4).

The synthesis of a family of zinc porphyrins and pyridine ligands equipped with peripheral H-bonding functionality provided access to a wide range of closely related supramol. complexes featuring between zero and four intramol. H-bonds. An automated UV/visible titration system was used to characterize 120 different complexes, and these data were used to construct a large of number of different chem. double mutant cycles to quantify the intramol. H-bonding interactions. The results probe the quant. structure-activity relation that governs cooperativity in the assembly of complex mol. recognition interfaces. Specifically, variations in the chem. structures of the complexes have allowed the authors to change the supramol. architecture, conformational flexibility, geometric complementarity, the number and nature of the H-bond interactions, and the overall stability of the complex. The free energy contributions from individual H-bonds are additive, and there is remarkably little variation with architecture in the effective molarity for the formation of intramol. interactions. Intramol. H-bonds are not observed in complexes where they are geometrically impossible, but there are no cases where excellent geometric complementarity leads to very high affinities. Similarly, changes in conformational flexibility seem to have limited impact on the values of effective molarity (EM). The major variation that was found for all of the 48 intramol. interactions that were examined using double mutant cycles is that the values of EM for intramol. carboxylate ester-phenol H-bonds (200 mM) are an order of magnitude larger than those found for phosphonate diester-phenol H-bonds (30 mM). The corresponding intermol. phosphonate diester-phenol H-bonds are 2 orders of magnitude more stable than carboxylate ester-phenol H-bonds, and the large differences in EM may be due to some kind of compensation effect, where the stronger H-bond is harder to make, because it imposes tighter constraints on the geometry of the complex.

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Imidazole – Wikipedia,
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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 Coenzyme binding site of glutamate decarboxylase, published in 1980-07-08, which mentions a compound: 3724-19-4, Name is 3-Pyridinepropionic acid, Molecular C8H9NO2, Reference of 3-Pyridinepropionic acid.

Dissociation constants were measured for the binding of a variety of simple analogs of pyridoxal 5′-phosphate to apoglutamate decarboxylase. Compounds studied had a simple alkyl or aryl group and a neg. charged substituent (phosphate, phosphonate, phosphoramidate, sulfate, sulfonate, or carboxylate). Optimum binding to the phosphate binding site of the enzyme was achieved by compounds having a double neg. charge and a tetrahedral geometry. Planar anions and monoanions bound considerably less well. These and previous data were used to derive the magnitudes of the contributions of various coenzyme functional groups to the strength of the apoenzyme-coenzyme interaction.

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Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 3-Pyridinepropionic acid( cas:3724-19-4 ) is researched.Electric Literature of C8H9NO2.Lu, Shui-Yu; Chin, Frederick T.; McCarron, Julie A.; Pike, Victor W. published the article 《Efficient O- and N-(β-fluoroethylation)s with NCA [18F]β-fluoroethyl tosylate under microwave-enhanced conditions》 about this compound( cas:3724-19-4 ) in Journal of Labelled Compounds & Radiopharmaceuticals. Keywords: fluorine 18 beta microwave fluoroethylation amine phenol carboxylic acid; pipecolinic acid chemoselective fluorine 18 beta microwave fluoroethylation. Let’s learn more about this compound (cas:3724-19-4).

Reactions of no-carrier-added (NCA) [18F]β-fluoroethyl tosylate with amine, phenol or carboxylic acid in the presence of base (e.g. Cs2CO3) to form the corresponding [18F]N-(β-fluoroethyl)amine, [18F]β-fluoroethyl ether or [18F]β-fluoroethyl ester, are rapid (2-10 min) and efficient (51-89% conversion) under microwave-enhanced conditions. These conditions allow reactants to be heated rapidly to 150° in a low b.p. solvent, such as MeCN, and avoid the need to use high b.p. solvents, such as DMSO and DMF, to promote reaction. The microwave-enhanced reactions gave ∼20% greater radiochem. yields than thermal reactions performed at similar temperatures and over similar reaction times. With a bi-functional mol., such as DL-pipecolinic acid, [18F]β-fluoroethyl tosylate reacts exclusively with the amino group.

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Reference:
Imidazole – Wikipedia,
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