Category: 2199-44-2

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, Russian Journal of General Chemistry called Synthesis and spectral properties of new 3,3′-bis(dipyrrolylmethene) with acetylene spacer, Author is Antina, E. V.; Guseva, G. B.; Loginova, A. E.; Semeikin, A. S.; V’yugin, A. I., the main research direction is bistetramethyl ethyldipyrrolylmethenyl acetylene dihydrobromide preparation; quantum chem simulation conformation spectral.Category: thiazolidine.

Bis(2,4,7,9-tetramethyl-8-ethyldipyrrolylmethen-3-yl)acetylene dihydrobromide (H2L·2HBr), new bis(dipyrrolylmethene), in whose mol. dipyrrolylmethene domains were connected through 3,3′-carbon atoms of internal pyrrole nuclei by acetylene spacer, were synthesized by original procedure. The compound was characterized by element anal., IR, 1H NMR, and electronic spectroscopy. The comparative anal. of spectral properties shows the reduction of the basicity of H2L ligand in comparison with the structural analogs, which contain internal methylene spacer. The quantum-chem. simulation showed that the rigid acetylene spacer gives linear structure to the H2L mol. in contrast to the spiral-shaped geometry of structural analogs with -CH2- spacer.

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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: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, is researched, Molecular C9H13NO2, CAS is 2199-44-2, about Synthesis and some reactions of pyrroles with aliphatic acyl substituents.Formula: C9H13NO2.

4-Acylpyrrolecarboxylates (I; R = EtCO, C15H31CO, C17H35CO) were prepared in about quant. yields of Friedel-Crafts acylation of I (R = H). Reduction of I by NaBH4 gave 82-97% of alc. (II; R = Et, C15H31, R1 = H). Heating II (R = C15H31, R1 = H) in pyridine with Ac2O gave 96% acryl derivative II (R = C15H31, R1 = Ac). Treatment of I (R = C17H35CO) with Pb(OAc)4 gave an acylated intermediate which with 40% HBr and MeOH gave 85% pyrrole (III; R = C17H35CO, R1 = MeO). Similarly III (R = C15H31CO, R1 = Cl) was obtained in 75% yield.

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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate(SMILESS: O=C(C1=C(C)C=C(C)N1)OCC,cas:2199-44-2) is researched.HPLC of Formula: 25956-17-6. The article 《Acetylene condensation in a series of pyrroles》 in relation to this compound, is published in Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya. Let’s take a look at the latest research on this compound (cas:2199-44-2).

Condensation of Et 4-iodo-3,5-dimethylpyrrole-2-carboxylate with HCCR(R = Ph, morpholinomethyl) in Et2NH in the presence of Pd (PPh3)2Cl2 and CuI gave ethynylpyrroles I in 64 and 68% yield, resp. Similar reaction with HOCMe2CCH gave the deiodinated product in 18% yield. Treatment of II (R = I) with CuCCPh in pyridine-DMF at reflux gave 78.0% II (R = CCPh). Deiodination of III (R = I) (IV) was easier than with the 4-iodo-2-carboxylate derivative but more difficult than II (R = I). In the presence of Pd complex catalyst condensation of IV and PhCCH gave concurrent redn and substitution.

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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 5-Unsubstituted 2-pyrrolecarboxaldehydes for porphyrin synthesis and the cyanovinyl protecting group. Author is Paine, John B. III; Dolphin, David.

(Cyanovinyl)pyrroles I (R = Me, R1 = Et, octyl; R = Et, R1 = Me) derived from the Knoevenagel condensation of benzyl 5-formyl-2-pyrrolecarboxylates with NCCH2CO2Me were employed in a facile sequence of 4 steps to produce, regioselectively, 2-pyrrolecarboxaldehydes II, important intermediates for porphyrin synthesis. Each step proceeded in 90-95% yield, making II available smoothly from benzyl 5-methyl-2-pyrrolecarboxylates in 7 steps, with an overall yield of 66-72%.

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