Category: 616-43-3

Application In Synthesis of 3-Methyl-1H-pyrrole. 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-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about Computational Design and Electropolymerization of Molecularly Imprinted Poly(p-Aminobenzoic-Acid-Co-Dapsone) Using Multivariate Optimization for Tetradifon Residue Analysis. Author is Ganjeizadeh Rohani, Fatemeh; Mohadesi, Alireza; Ansari, Mehdi.

In this study, tetradifon as a non-electroactive pesticide was measured by a new gold electrode modified with electropolymerized molecularly imprinted poly(para aminobenzoic acid-co-4,4-diaminodiphenyl sulfone) (P-pABA-co-DDS). The best available monomer was selected based on computational design and then the polymer was developed in optimized condition. Screening of various factors was performed by Plackett-Burman design (PBD) and central composite design (CCD) was utilized to select optimized condition. Under the optimized condition, calibration curve of tetradifon on MIP/gold electrode was constructed with a linear range of 0.05- 2.50μM. The limit of detection (LOD) and limit of quantification (LOQ) was found to be 0.014 and 0.047μM, resp. The developed method showed good stability, repeatability, and reproducibility, sensitivity and selectivity for tetradifon. The developed method was applied to determine tetradifon in real water samples.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

Reference of 3-Methyl-1H-pyrrole. 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-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about Photosensitized oxygenation of 3-methylpyrrole involving a dioxetane intermediate. Author is Lightner, David A.; Low, Lawrence K..

The Rose Bengal-sensitized photooxidation of 3-methylpyrrole in MeOH gave 3% 3-methyl-3-methoxy-4-pyrrolin-2-one and 6% 3-hydroxy-3-methyl-4-pyrrolin-2-one via a dioxetane intermediate, 22% 3-methyl-5-methoxy-3-pyrrolin-2-one, 7% 4-methyl-5-methoxy-3-pyrrolin-2-one, 10% 5-hydroxy-3-methyl-3-pyrrolin-2-one, and 13% citraconimide.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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.van Bergen, Pim F.; Flannery, Matthew B.; Poulton, Paul R.; Evershed, Richard P. researched the compound: 3-Methyl-1H-pyrrole( cas:616-43-3 ).Recommanded Product: 3-Methyl-1H-pyrrole.They published the article 《Organic geochemical studies of soils from Rothamsted Experimental Station: III. Nitrogen-containing organic matter in soil from Geescroft Wilderness》 about this compound( cas:616-43-3 ) in ACS Symposium Series. Keywords: nitrogen soil organic matter. We’ll tell you more about this compound (cas:616-43-3).

Three distinct soil horizons from a mature oak dominated woodland were studied in order to determine the changes in the mol. composition of nitrogen-containing organic matter down a soil profile. The total amount of nitrogen relative to soil organic carbon increased down the profile with most of the recognizable nitrogen-containing compounds in the leaf litter and humic horizon being either amino acid or amino sugar derived. In contrast, a significant proportion of the organic nitrogen moieties in the mineral horizon appeared to contain macromol.-bound nitrogen which is believed to represent the socalled “”unknown”” soil organic nitrogen and is not obviously related to known biomols. The increase in total amino acids in the humic and mineral horizons indicated contributions from sources other than the leaf litter. The increase in organic nitrogen-containing moieties, most probably amino acids derived, accounted for the less depleted δ13C values observed in the mineral soil horizon.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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.Ikawa, Takashi; Takagi, Akira; Kurita, Yurio; Saito, Kozumo; Azechi, Kenji; Egi, Masahiro; Kakiguchi, Keisuke; Kita, Yasuyuki; Akai, Shuji researched the compound: 3-Methyl-1H-pyrrole( cas:616-43-3 ).Synthetic Route of C5H7N.They published the article 《Preparation and regioselective Diels-Alder reactions of borylbenzynes: synthesis of functionalized arylboronates》 about this compound( cas:616-43-3 ) in Angewandte Chemie, International Edition. Keywords: Diels Alder cycloaddition iodophenol triflate boryl benzyne furan pyrrol; benzyne generation pinacolboryl substituted iodophenol triflate furan pyrrol cycloaddition; boronate naphthyl preparation epoxy imino Diels Alder cycloaddition benzyne; aromatic amine phenol boronate preparation cycloaddition benzyne furan pyrrol; regioselective Diels Alder cycloaddition arylboronate benzyne furan pyrrol. We’ll tell you more about this compound (cas:616-43-3).

1,3,2-Dioxaborolan-2-yl benzynes, generated from 2-Bpin-4-R1-6-iodophenol triflates [6a-d; Bpin = B(OCMe2)2] undergo regioselective Diels-Alder cycloaddition with 2-R2-furans and 2-R2-4-R3-1-R4-1H-pyrroles, yielding the corresponding functionalized boronates I (4a-m; R1 = H, Me, Br, CO2Me; R2 = Me, Bu, tBu, SiMe3, SnBu3, CO2Me, COMe, CN, Ph, OMe) and II (same R1, R2 = H, Et, CH2CH2Ph; R3 = H, Me; Z = NTs, NBoc) with high yields and 87-98% regioselectivities. The benzyne formation was promoted by iPrMgCl/LiCl reagent. The boronate group was successfully converted into butylamino, hydroxy and Ph groups following common procedures.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 3-Methyl-1H-pyrrole( cas:616-43-3 ) is researched.Reference of 3-Methyl-1H-pyrrole.Groves, J. K.; Anderson, Hugh J.; Nagy, H. published the article 《Pyrrole chemistry. XIII. New syntheses of 3-alkylpyrroles》 about this compound( cas:616-43-3 ) in Canadian Journal of Chemistry. Keywords: pyrrole alkyl preparation. Let’s learn more about this compound (cas:616-43-3).

3-n-Alkylpyrroles are prepared in good yield by a combined Wolff-Kishner reduction and hydrolysis and decarboxylation of 4-acyl-2-pyrrole-thiolcarboxylates. Me 4-isopropyl-2-pyrrolecarboxylate and 4-tert-butyl-2-pyrrolecarbonitrile are prepared by alkylation of Me 2-pyrrolecarboxylate and 2-pyrrolecarbonitrile, resp. Hydrolysis and decarboxylation of these disubstituted compounds afford the corresponding-3-alkylpyrroles. Mass spectral data for some 1-, 2-, and 3-alkylpyrroles are reported.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Thermal reactions of organic nitrogen compound. I. I-Methylpyrrole》. Authors are Jacobson, I. A. Jr.; Heady, H. H.; Dinneen, G. U..The article about the compound:3-Methyl-1H-pyrrolecas:616-43-3,SMILESS:CC1=CNC=C1).Recommanded Product: 616-43-3. Through the article, more information about this compound (cas:616-43-3) is conveyed.

A flow method was used at 475-700°. At 475-575° the reaction was a homogeneous 1st-order isomerization, 1-methylpyrrole → 2-methylpyrrole → 3-methylpyrrole. The Arrhenius equation for this reaction, based on the disappearance of 1-methylpyrrole, is k = 2.39 × 1012e(-54,800/RT). Above 575° there was decomposition to give a complex mixture of reaction products.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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: 616-43-3, is researched, Molecular C5H7N, about Immunochemical Detection of Protein Modification Derived from Metabolic Activation of 8-Epidiosbulbin E Acetate, the main research direction is immunoassay epidiosbulbin E acetate modified protein.Synthetic Route of C5H7N.

Furanoid 8-epidiosbulbin E acetate (EEA) is one of the most abundant diterpenoid lactones in herbal medicine Dioscorea bulbifera L. (DB). Our early work proved that EEA could be metabolized to EEA-derived cis-enedial (EDE), a reactive intermediate, which is required for the hepatotoxicity observed in exptl. animals exposed to EEA. Also, we found that EDE could modify hepatic protein by reaction with thiol groups and/or primary amines of protein. The present study was inclined to develop polyclonal antibodies to detect protein modified by EDE. An immunogen was prepared by reaction of EDE with keyhole limpet hemocyanin (KLH), and polyclonal antibodies were raised in rabbits immunized with the immunogen. Antisera collected from the immunized rabbits demonstrated high titers evaluated by enzyme-linked immunosorbent assays (ELISAs). Immunoblot anal. showed that the polyclonal antibodies recognized EDE-modified bovine serum albumin (BSA) in a hapten load-dependent manner but did not cross-react with native BSA. Competitive inhibition experiments elicited high selectivity of the antibodies toward EDE-modified BSA. The antibodies allowed us to detect and enrich EDE-modified protein in liver homogenates obtained from EEA-treated mice. The developed immunoprecipitation technique, along with mass spectrometry, enabled us to succeed in identifying multiple hepatic proteins of animals given EEA. We have successfully developed polyclonal antibodies with the ability to recognize EDE-derived protein adducts, which is a unique tool for us to define the mechanisms of toxic action of EEA.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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: 3-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about Optimised coagulation using aluminium sulfate for the removal of dissolved organic carbon.Name: 3-Methyl-1H-pyrrole.

Coagulation experiments at pH values ranging from 3 to 7 were conducted on raw water samples from four Australian reservoirs-Hope Valley, Myponga, Moorabool and Mt Zero-to assess the removal of natural organic matter (NOM) with alum. The aim was to characterize the NOM in these water sources that is highly recalcitrant to removal by alum coagulation. The selection of these water sources covered a range in raw water quality varying in inorganic and organic composition and character. NOM in both raw and treated waters was characterized by several techniques including specific UV absorbance (SUVA), high performance size exclusion chromatog. (HPSEC) and pyrolysis-gas chromatog. mass spectrometry (Py-GC-MS). The results can provide better understanding of the removal limitations of each treatment step and the knowledge will allow design engineers to select a suitable combined treatment process for optimum NOM removal. Despite the fact that the organic character of the four source waters were different, results showed that after optimized alum coagulation all four waters had a similar character. The mol. weight distribution anal. (HPSEC) indicated alum coagulation preferentially removed the higher mol. weight UV absorbing compounds while those remaining in the treated waters had the properties of lower apparent mol. weights (about 500-700 Daltons) and less UV absorbance. Py-GC-MS analyses of NOM in these waters before and after treatment indicated that polysaccharides and their derivatives are recalcitrant to removal with alum coagulation. Generally, the findings indicate that the character of the NOM is an important factor in determining its treatability.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

Electric Literature of C5H7N. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 3-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about Fractionation and identification of organic nitrogen species from bio-oil produced by fast pyrolysis of sewage sludge. Author is Cao, Jing-Pei; Zhao, Xiao-Yan; Morishita, Kayoko; Wei, Xian-Yong; Takarada, Takayuki.

Pyrolysis of sewage sludge was performed at 500° and a sweeping gas flow rate of 300 cm3/min in a drop tube furnace. Liquid fraction (i.e., bio-oil) from the sewage sludge pyrolysis was separated by silica-gel column chromatog. (SGCC) with different solvents, including mixed solvents, as eluants. Alkanenitriles (C13-C18), oleamide, alkenenitrile, fatty acid amides and aromatic nitrogen species were fractionated from the bio-oil by SGCC and analyzed with a gas chromatog./mass spectrometry (GC/MS). Most of the GC/MS-detectable organic nitrogen species (ONSs) are lactams, amides and N-heterocyclic compounds, among which acetamide is the most abundant. N-heterocyclics with 1-3 rings, including pyrrole, pyridine, indole, benzoimidazole, carbazole, norharman and harman, were observed The lactams detected include pyrrolidin-2-one, succinimide, phthalimide, glutarimide, piperidin-2-one and 3-isobutylhexahydropyrrolo[1,2-a]pyrazine-1,4-dione, all of which should be formed via decarboxylation and cyclization of γ- and δ-amino acids. Such a procedure provides an effective approach to fractionation and identification of ONSs from bio-oil produced by fast pyrolysis of sewage sludge.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate

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.Buurman, P.; Nierop, K. G. J.; Kaal, J.; Senesi, N. researched the compound: 3-Methyl-1H-pyrrole( cas:616-43-3 ).Product Details of 616-43-3.They published the article 《Analytical pyrolysis and thermally assisted hydrolysis and methylation of EUROSOIL humic acid samples – A key to their source》 about this compound( cas:616-43-3 ) in Geoderma. Keywords: humic acid Eurosoil aliphaticity lignin. We’ll tell you more about this compound (cas:616-43-3).

Humic acids have been widely investigated by spectroscopic methods, especially NMR and FTIR, and they are known to show significant differences according to their origin. Low resolution methods such as NMR and FTIR, however cannot easily distinguish different input sources or establish relations between SOM chem. and vegetation or land use in general. High resolution methods, such as anal. pyrolysis and pyrolysis combined with methylation do offer such possibilities. Therefore, HAs from five reference soils called the Eurosoils, including a Vertic Cambisol (E1, Italy), a Rendzina (E2, Greece), a Dystic Cambisol (E3, Great Britain), an Orthic Luvisol (E4, France) and an Orthic Podzol (E5, Germany), that were previously characterized a.o. by NMR, FTIR and ESR, were also analyzed by pyrolysis-gas chromatog./mass spectrometry (Py-GC/MS) and thermally assisted hydrolysis and methylation (THM) and subsequent anal. by GC/MS. The Orthic Podzol sample showed the largest aliphaticity, and the strongest degradation of aliphatics and lignin. The Dystric Cambisol featured the least decomposed HA, which was reflected by a large content of long-chain alkanes, and little lignin degradation Both the Dystric Cambisol and the Orthic Luvisol HAs contained a significant amount of microbial organic matter. Polyaromatics, which indicate the presence of charred material, were most abundant in the Vertic Cambisol and the Podzol HAs and lowest in the Dystric Cambisol and the Rendzina HAs. THM was able to distinguish between the various vegetations/land uses. Although quantifications by NMR and py-GC/MS are essentially different, the general results largely coincided. NMR appears to underestimate aromaticity and overestimate aliphaticity, but a mol. mixing model yielded reasonable correlations between NMR and pyrolysis data. Classification by degradation state’ based on py-GC/MS largely coincided with acidity determined by titration, but FTIR data did not coincide. Py-GC/MS, with its much larger resolution, is a better tool to distinguish effects of vegetation, microbial input, and degradation HA’s produce the same variety of compounds upon pyrolysis as total SOM extracts and are therefore chem. not more simple than SOM. HA chem., however can be understood in the light of land use history and SOM dynamics.

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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate