Category: 2199-44-2

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 Complexation between decamethyl-3,3′-bis(dipyrrolylmethene) and zinc(II), copper(II), and cobalt(II) acetates, published in 2009-01-31, which mentions a compound: 2199-44-2, Name is Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, Molecular C9H13NO2, Reference of Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate.

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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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.Zhang, Y.; Wang, Z.; Yan, C.; Li, G.; Ma, J. researched the compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate( cas:2199-44-2 ).Quality Control of Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate.They published the article 《Synthesis and self-assembly of a novel tetrapyrrole containing dipyrrin units linked at the 3,3′-positions》 about this compound( cas:2199-44-2 ) in Tetrahedron Letters. Keywords: dipyrrin tetrapyrrole preparation selfassembly; zinc tetrapyrrole complex preparation crystal structure; mol structure zinc tetrapyrrole complex. We’ll tell you more about this compound (cas:2199-44-2).

A novel ligand comprising two dipyrrin units linked by a CH2 spacer at the 3-position was synthesized and used to prepare a double-stranded helical assembly. Its structure was confirmed by x-ray anal. of its Zn complex. A new approach to 3,3′-linked dipyrromethanes with CH2 as the spacer is also reported.

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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: 2199-44-2, is researched, SMILESS is O=C(C1=C(C)C=C(C)N1)OCC, Molecular C9H13NO2Journal, Journal of Heterocyclic Chemistry called Microwave-accelerated synthesis of benzyl 3,5-dimethyl-pyrrole-2-carboxylate, Author is Regourd, Jasmine; Comeau, Ian M.; Beshara, Cory S.; Thompson, Alison, the main research direction is ethyl pyrrolecarboxylate benzyl alc transesterification microwave irradiation; acetylpyrrolecarboxylate benzyl deacetylation microwave irradiation; pyrrolecarboxylate benzyl preparation.SDS of cas: 2199-44-2.

Benzyl 3,5-dimethyl-pyrrole-2-carboxylate (I), a very useful pyrrole in porphyrin and dipyrromethene synthesis, can be synthesized via the Knorr-type reaction, but in low yield. Alternative routes to I have been developed involving the trans-esterification of Et 3,5-dimethyl-pyrrole-2-carboxylate and the deacetylation of benzyl 4-acetyl-3,5-dimethyl-2-carboxylate, both precursors being easily obtained using the Knorr reaction. These traditional methods involve treatment of the known products with a strong basic solution or heating for extended periods which often lead to decomposition The use of microwave energy to promote these two reactions proves to be an extremely efficient way to obtain I quickly, in high yield, and in excellent purity with no need for recrystallization Of particular note is the use of catalytic sodium methoxide in benzyl alc., rather than stoichiometric amounts of sodium benzoxide, to effect benzylation.

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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.Zhestkov, V. P.; Mironov, A. F.; Rosynov, B. V.; Ustynyuk, L. A.; Myagkova, G. I.; Evstigneeva, R. P. researched the compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate( cas:2199-44-2 ).COA of Formula: C9H13NO2.They published the article 《Studies on the synthesis of porphyrin a. II. Synthesis of porphyrins with higher saturated and unsaturated acyl substituents》 about this compound( cas:2199-44-2 ) in Bioorganicheskaya Khimiya. Keywords: deuteroporphyrin IX; biladiene cyclization; pyrrole reacion tripyrrene. We’ll tell you more about this compound (cas:2199-44-2).

Deuteroporphyrins IX [I, R1 = Me2C:CH(CH2)2CMe:CH(CH2)2CMe:CHCH2, Me2CH(CH2)3CHMe(CH2)3CHMe(CH2)2, Me2CBrCHBr(CH2)2CBrMeCHBr(CH2)2CBrMeCHBrCH2] were obtained in 33-92% yields by cyclization of the corresponding biladienes II, prepared from a pyrrole derivative and a tripyrrene.

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Product Details of 2199-44-2. 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 Fluoropyrroles and tetrafluoroporphyrins.

Photolysis of the pyrrole-β-diazonium tetrafluoroborate I (R = N2+BF4-) gave the β-fluoropyrrole I (R = F) which was oxidized to the alc. II. Treatment of II with K3Fe(CN)6 or Cu(OAc)2 gave the fluoroporphyrins III (M = 2H, Cu) resp.

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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 Improved synthesis of covalently strapped porphyrins. Application to highly deformed porphyrin synthesis, published in 1988-04-01, which mentions a compound: 2199-44-2, Name is Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, Molecular C9H13NO2, Category: thiazolidine.

The title porphyrins I (n = 1, 2, 3) were prepared α,ω-Dicarboxyalkyl dichloride, was treated with 2 equiv of 2-(ethoxycarbonyl)-3,5-dimethylpyrrole, and the chain-linked bis[5-(ethoxycarbonyl)pyrrole] so obtained was transformed into the pyrrole-2-carboxaldehyde by using standard methodol. Protection of the formyl groups as the dicyanovinyl derivative and the activation of the 2-Me substituents with SO2Cl2 gave the bis[2-(chloromethyl)pyrrol)], which on reaction with a 5-unsubstituted 2-pyrrolecarboxylate, in warm AcOH, afforded the chain-linked dipyrromethane dimer in high yield. Regeneration of the formyl substituents and removal of the ester group produced the 5-formyldipyrromethane dimer II, which was cyclized intramolecularly, under high dilution, to give I. II (n = 0) failed to cyclize.

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Safety of Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate. 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: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, is researched, Molecular C9H13NO2, CAS is 2199-44-2, about Electrophilic heteroaromatic substitutions. XI. Thallium in pyrrole chemistry. Formation of C-pyrrylthallium derivatives. Author is Monti, Donato; Sleiter, Giancarlo.

Reaction of several pyrrole derivatives with Tl(III) salts was investigated under different exptl. conditions. C-Thallation is dependent on what position (α or β) of the pyrrole nucleus is amenable to attack, and on the nature of the thallating agent. Yields are strongly influenced by electronic and steric effects of the substituents already present in the pyrrole nucleus and by the nature of the reaction medium. Spectroscopic and anal. data for the C-pyrrylthallium derivatives prepared are reported. E.g., treating pyrroles I (R = H; R1 = Me, Et) with Tl(OAc)3 in MeCN or CH2ClCH2Cl gave 37-79% I [R = (AcO)2Tl; same R1].

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Nitropyrroles. III. Ultraviolet absorption spectra and tautomeric transformations of some nitropyrroles》. Authors are Novikov, S. S.; Belikov, V. M.; Egorov, Yu. P.; Safonova, E. N.; Semenov, L. V..The article about the compound:Ethyl 3,5-Dimethyl-2-pyrrolecarboxylatecas:2199-44-2,SMILESS:O=C(C1=C(C)C=C(C)N1)OCC).Product Details of 2199-44-2. Through the article, more information about this compound (cas:2199-44-2) is conveyed.

cf. ibid. 1307. Examination of the ultraviolet absorption spectra of some nitropyrroles showed the possibility of identification of these substances and confirmed the structure of 1-methyl-3,4-dinitropyrrole. Acidity of N-unsubstituted pyrrole with nitro groups in the ring increases with increasing number of NO2 groups and with transfer of NO2 group from 3- to 2-position, probably owing to the inductive effect of the group on the NH bond. This phenomenon is discussed in connection with tautomerism of nitropyrroles. The following absolute maximum are reported: pyrrole 210 and 240 mμ; 3-methyl-4-ethylpyrrole 200; 2-ethoxycarbonyl-3,5-dimethylpyrrole 240 and 276; 3-ethoxycarbonyl-2,4-dimethylpyrrole 232 and 259; 2-acetyl-3,5-dimethyl-4-ethylpyrrole 266 and 308; 2,4-dimethyl-3-acetylpyrrole 251 and 280. Spectra of nitropyrroles are shown at various pH values. In basic media these show a maximum at about 400 mμ.

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Electric Literature of C9H13NO2. 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 Synthesis and self-assembly of a novel tetrapyrrole containing dipyrrin units linked at the 3,3′-positions. Author is Zhang, Y.; Wang, Z.; Yan, C.; Li, G.; Ma, J..

A novel ligand comprising two dipyrrin units linked by a CH2 spacer at the 3-position was synthesized and used to prepare a double-stranded helical assembly. Its structure was confirmed by x-ray anal. of its Zn complex. A new approach to 3,3′-linked dipyrromethanes with CH2 as the spacer is also reported.

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Application In Synthesis of Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate. 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: 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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