Tag: M.W:100-200

Recommanded Product: 2199-44-2. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, is researched, Molecular C9H13NO2, CAS is 2199-44-2, about Nuclear magnetic resonance study of carbethoxypyrroles. Author is Roomi, Mohammad W.; Dugas, H..

The chem. shifts and the ring proton coupling constants of various substituted carbethoxypyrroles are reported. The electron-withdrawing effect of the carbethoxy groups shifts the resonances of the ring substituents to low field while the inductive and mesomeric effects of the Me groups shift the resonances to higher field. The deshielding effect is more pronounced with 2-carbethoxypyrroles than for 3-carbethoxypyrroles. The ring proton spin-spin coupling constants depend on the nature of substituents and increase with the electronegativity of the substituents. In some cases, long-range coupling between the Me side-chain protons and ring protons was observed.

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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

HPLC of Formula: 2199-44-2. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, is researched, Molecular C9H13NO2, CAS is 2199-44-2, about Synthesis of a chiral 3,3′-di-tert-butyl-2,2′-bipyrrole. Author is Skowronek, Pawel; Lightner, David A..

Di-Et 3,3′-di-tert-butyl-4,4′-dimethyl-2,2′-bipyrrole-5,5′-dicarboxylate (I) was synthesized in four steps from Et 3,5-dimethyl-1H-pyrrole-2-carboxylate. The CH2 hydrogens of the Et ester groups of the former are diastereotopic in the 1H-NMR, consistent with axial chirality of the bipyrrole and restricted rotation about the 2,2′-bipyrrole bond, due to the tert-Bu groups. X-ray anal. of crystalline I shows that the pyrrole rings are twisted out of coplanarity by 84.5°.

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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

Quality Control of Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate. 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: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, is researched, Molecular C9H13NO2, CAS is 2199-44-2, about A new and practical synthesis of pyrroles. Author is Quiclet-Sire, Beatrice; Thevenot, Isabelle; Zard, Samir Z..

Heating γ-nitro ketones bearing an electron-withdrawing group such as an ester geminal to the nitro group with formamidinesulfinic acid (reducing agent) and triethylamine in isopropanol produces pyrroles in good yield. The reductive cyclocondensation of α-nitro-δ-oxo-β-phenylbenzenepentanoic acid ester gave 3,5-diphenyl-1H-pyrrole-2-carboxylic acid Et ester (85% yield).

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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

Application of 2199-44-2. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, is researched, Molecular C9H13NO2, CAS is 2199-44-2, about Atropisomerism in monopyrroles. Author is Boiadjiev, Stefan E.; Lightner, David A..

As observed by NMR, iodopyrroles 1a and 1b (Et and Me 3,5-dimethyl-4-[(1′-iodo-2′,2′-dimethyl)propyl]pyrrole-2-carboxylate) and a variety of related derivatives with iodine replaced by methoxy 2, thiomethyl 3, acetic acid esters 4, propionic acid ester 5 or malonic esters 6 exhibit restricted rotation about the C(4)-C(1′) bond due to the bulky tert-Bu group and an ortho effect from the sterically crowded 3,5-dimethylpyrrole. Most of the compounds, which are members of the rare class of atropisomers due to restricted rotation about an sp3-sp2 C-C bond, undergo diastereomeric enrichment by preparative TLC and crystallization From dynamic NMR studies of the enriched diastereomers one can determine kinetic and thermodn. parameters associated with the atropisomerism, e.g., ΔG‡ ∼24 kcal/mol for 1 and 5 (313 K), ∼22 kcal/mol for 3 (273 K), and ∼25 kcal/mol for 6 (313 K) in C2D2Cl4 solvent.

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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

Application of 2199-44-2. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, is researched, Molecular C9H13NO2, CAS is 2199-44-2, about The special features of the thermal oxidative destruction of isomeric dipyrrolylmethanes. Author is Guseva, G. B.; Antina, E. V.; Semeikin, A. S.; Berezin, M. B.; V’yugin, A. I..

3,3′,4,4′-Tetramethyl-5,5′-dicarbethoxydipyrrolylmethane-2,2′ and its α,β and β,β isomers were synthesized. The compounds were characterized by recording their proton NMR spectra. The thermal oxidative destruction of the compounds was studied thermogravimetrically. The results were used to determine the temperature and enthalpy characteristics of fusion and the temperatures of the beginning and maxima of the exothermic effects of the destruction of dipyrrolylmethanes in air oxygen. The thermal stability of dipyrrolylmethanes was found to be primarily determined by mol. isomerism and increase for sym. substituted α,α- and β,β-dipyrrolymethanes compared with the α,β isomer.

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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

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: 15965-55-6, is researched, Molecular C7H4ClN3O2, about Heterocyclic betaines. XXII. Azinium(azolium) 4-nitrobenzimidazolate inner salts and their derivatives with several interannular spacers. Synthesis, characterization and antitrichomonal activity, the main research direction is nitrobenzimidazolate pyridinium imidazolium preparation antiprotozoal activity.Recommanded Product: 15965-55-6.

The synthesis of an ensemble of pyridinium(imidazolium) 4-nitrobenzimidazolate betaines and their derivatives with several interannular linkages has been explored. Their antiprotozoal activity has also been examined

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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

Quality Control of Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate. 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: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, is researched, Molecular C9H13NO2, CAS is 2199-44-2, about Synthesis of a chiral 3,3′-di-tert-butyl-2,2′-bipyrrole.

Di-Et 3,3′-di-tert-butyl-4,4′-dimethyl-2,2′-bipyrrole-5,5′-dicarboxylate (I) was synthesized in four steps from Et 3,5-dimethyl-1H-pyrrole-2-carboxylate. The CH2 hydrogens of the Et ester groups of the former are diastereotopic in the 1H-NMR, consistent with axial chirality of the bipyrrole and restricted rotation about the 2,2′-bipyrrole bond, due to the tert-Bu groups. X-ray anal. of crystalline I shows that the pyrrole rings are twisted out of coplanarity by 84.5°.

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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

Electric Literature of C9H13NO2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, is researched, Molecular C9H13NO2, CAS is 2199-44-2, about Reactions on solid supports. Part-3. Hydrogen isotope exchange reactions catalyzed by montmorillonite clay. Author is Rao, K. R. Nagaraja; Towill, Robert C.; Jackson, Anthony H..

Deuterated clay in which the interlammelar water has been replaced by deuterium oxide can be used for exchange of acidic protons in a variety of organic substrates. β-Keto esters and β-diketones undergo rapid exchange of the methylene protons in chloroform solutions in presence of deuterated clay; pyrrole undergoes exchange of all protons, whereas indoles preferentially undergo exchange at the 3-position as expected, although prolonged exposure to the reagent leads to exchange at other positions.

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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

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: 2199-44-2, is researched, Molecular C9H13NO2, about Lability of the β-(diethylamino)ethyl group under Knorr pyrrole ring formation conditions, the main research direction is isonitrosoacetoacetic ester cyclization; acetoacetic ester isonitroso cyclization; aminoethylpentanedione cyclization Knorr; pyrrolecarboxylate dimethyl.HPLC of Formula: 2199-44-2.

Condensation of (MeCO)2CHCH2CH2NEt2 (I) with MeCOC(:NOH)CO2R (R = Et, PhCH2) in HOAc containing NaOAc and Zn powder at 60-65° yielded the acetylpyrroles II and diethylaminoethylpyrroles III. Similarly, I and HON:C(CO2Et) yielded dimethylpyrrole IV.

Although many compounds look similar to this compound(2199-44-2)HPLC of Formula: 2199-44-2, numerous studies have shown that this compound(SMILES:O=C(C1=C(C)C=C(C)N1)OCC), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com

Guseva, G. B.; Dudina, N. A.; Antina, E. V.; V’yugin, A. I.; Semeikin, A. S. published an article about the compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate( cas:2199-44-2,SMILESS:O=C(C1=C(C)C=C(C)N1)OCC ).Reference of Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate. 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:2199-44-2) through the article.

Decamethylmethylene-3,3′-bis(dipyrrolylmethene) dihydrobromide H2L·2HBr, which is the simplest representative of a novel class of oligo(dipyrrolylmethenes) belonging to chromophore chelating nonmacrocyclic ligands, were examined by 1H NMR, IR, and electronic absorption spectroscopy. Complexation reactions of H2L·2HBr with M(AcO)2 (M = Zn(II), Cu(II), and Co(II)) in DMF at 298.15 K were monitored by electronic absorption spectroscopy and studied by the molar ratio method. The thermodn. constants K0 of these reactions were estimated The d metal ions coordinate H2L to give the binuclear homoleptic complexes [M2L2]. The reactions proceed through the intermediate binuclear heteroleptic complex [M2L(AcO)2] detected by spectroscopic methods. The thermodn. stabilities of [M2L2] and [M2L(AcO)2] increase when moving from Cu(II) to Zn(II) and Co(II). The probability of formation and stability of [M2L2] containing 3,3′-bis(dipyrrolylmethene) are substantially higher than those of analogous complexes with the 2,2′-isomer (decamethyl-2,2′-biladiene-a,c). The low K0 values for the complexation between H2L and Cu(AcO)2 are due to slow oxidation of the biladiene ligand into a bilatriene with participation of Cu2+ ions.

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Reference:
Thiazolidine – Wikipedia,
Thiazolidine – ScienceDirect.com