Month: March 2022

Duvall, J. J.; Jensen, H. B. published the article 《The radiation chemistry of some simple pyrroles》. Keywords: radiation chem pyrrole.They researched the compound: 3-Methyl-1H-pyrrole( cas:616-43-3 ).Related Products of 616-43-3. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:616-43-3) here.

Pyrrole, monomethylpyrroles, and 2,5-dimethylpyrrole were γ-irradiated. Gaseous, liquid and residual products were determined The products indicate that several types of reactions occur including ring rupture, cleavage of bonds external to the pyrrole ring, ring substitution, and intramol. rearrangement. A brief comparison is made among radiolysis, photolysis, mass spectral ionization, and pyrolysis reactions of pyrrole compounds

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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: cis-4-Aminocyclohexane carboxylic acid( cas:3685-23-2 ) is researched.Synthetic Route of C7H13NO2.Patel, R. K.; Gisvold, Ole published the article 《The synthesis of some simple n-alkyl esters of 4-amino-1-cyclohexanecarboxylic acid》 about this compound( cas:3685-23-2 ) in Journal of the American Pharmaceutical Association (1912-1977). Keywords: ANESTHETICS; CYCLOHEXANES. Let’s learn more about this compound (cas:3685-23-2).

The following esters of cis-4-amino-1-cyclohexanecarboxylic acid were prepared by treating the crude acid chloride with the appropriate anhydrous alc. and recrystallizing the resulting ester from the alc. used in its preparation: Et, m. 193-4°, Pr, m. 184-5°, Bu, m. 174-5°, and pentyl, m. 169-70°. A preliminary test indicated that these compounds had anesthetic properties.

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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 14N nuclear quadrupole coupling and methyl internal rotation in 3-methylpyrrole investigated by microwave spectroscopy, the main research direction is methylpyrrole nuclear quadrupole coupling.Application of 616-43-3.

The mol. structure of 3-methylpyrrole in the gas phase has been determined using a combination of high-resolution spectroscopy and quantum chem. calculations The rotational spectrum was recorded using a mol. jet Fourier transform microwave spectrometer covering the frequency range from 2.0 to 26.5 GHz. The exptl. data were analyzed using the programs XIAM and BELGI-Cs-hyperfine. Because the internal rotor axis accidentally lies along the principal a-axis of inertia, the rho axis system and the principal axis system coincide, enabling a direct comparison of the fits. With the program XIAM, the rotational constants A = 8631.1629(12), B = 3342.19750(43), and C = 2445.73846(42) MHz were obtained. Torsional splittings due to internal rotation of the Me group were observed, leading to the determination of the V3 potential of 245.92445(31) cm-1. Hyperfine splittings arising from the nuclear quadrupole coupling of the 14N nucleus could be resolved, and the quadrupole coupling constants χaa = 1.4159(49) and χbb – χcc = 4.1622(86) MHz were found.

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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

Category: chiral-oxygen-ligands. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: cis-4-Aminocyclohexane carboxylic acid, is researched, Molecular C7H13NO2, CAS is 3685-23-2, about cis-4-[[[(2-Chloroethyl)nitrosoamino]carbonyl]methylamino]cyclohexanecarboxylic acid, a nitrosourea with latent activity against an experimental solid tumor. Author is Johnston, Thomas P.; McCaleb, George S.; Rose, William C.; Montgomery, John A..

The title compound (I) was synthesized in five steps from cis-4-aminocyclohexanecarboxylic acid via the N-tosylated intermediate II. I, which is incapable of the facile decomposition that characterizes the clin. useful nitrosoureas, effected a significant cure rate of both early and established murine Lewis lung carcinoma, even though its in vitro half-life was ∼5.5 times that of the unmethylated parent compound This is the first observation of latent activity of a nitrosourea against an exptl. solid tumor.

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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 《Synthesis of α,α’-unsubstituted pyrroles》. Authors are Plieninger, H.; Buhler, W..The article about the compound:3-Methyl-1H-pyrrolecas:616-43-3,SMILESS:CC1=CNC=C1).Quality Control of 3-Methyl-1H-pyrrole. Through the article, more information about this compound (cas:616-43-3) is conveyed.

α,α’-Unsubstituted pyrroles were made as intermediates for the synthesis of porphyrins and bile pigments. 3-Methylpyrrole (I) and 3,4-dimethylpyrrole were obtained in 40% yield (based on the starting acetal) from MeCOCH2CH(OMe)2 (II) and MeCOCHMeCH(OMe)2, resp. II cyanohydrin was condensed with dihydropyrene (III) to give MeC(CN)(OCH.CH2.CH2.CH2.CH2.O)CH2CH(OMe)2 which was reduced to the corresponding amine with LiAlH4. Acidification liberated the pyrrole but because of further transformation in the presence of acid, it could not be isolated. Acetylation of the amine, followed by treatment with MeC6H4SO3H in absolute Me2CO, split off III, liberated the aldehyde group and gave I acetyl derivative in one step. I was obtained by careful alk. hydrolysis.

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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

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: 56413-95-7, is researched, SMILESS is N#CC1=NC(Cl)=C(Cl)N=C1C#N, Molecular C6Cl2N4Journal, Dyes and Pigments called The synthesis and cyclotetramerisation reactions of aryloxy-, arylalkyloxy-substituted pyrazine-2,3-dicarbonitriles and spectroelectrochemical properties of octakis(hexyloxy)-pyrazinoporphyrazine, Author is Uslu Kobak, Rabia Zeynep; Oeztuerk, Egemen Selcuk; Koca, Atif; Guel, Ahmet, the main research direction is arylalkyloxy substituted pyrazine dicarbonitrile dye synthesis cyclotetramerization.Product Details of 56413-95-7.

Novel, aryloxy- and arylalkyloxy-substituted pyrazine dicarbonitriles were synthesized from 5,6-dichloropyrazine-2,3-dicarbonitrile and the corresponding phenol/alc. derivatives Cyclotetramerisation of these pyrazine derivatives to form metal pyrazinoporphyrazines in the presence of appropriate metal salts in different solvents such as DMF, quinoline, 2-dimethylaminoethanol and n-hexanol, resulted in decomposition products with the exception of the latter solvent which lead to mainly octakis(alkyloxy)pyrazinoporphyrazines. Cyclic voltammetry and differential pulsed voltammetry of the complexes indicated that cobalt pyrazinoporphyrazine displayed both ligand and metal-based redox processes while zinc and copper derivatives exhibited only ligand-based redox processes. The redox processes of the pyrazinoporphyrazines shifted significantly towards pos. potentials compared to those of the common phthalocyanines. The novel compounds were characterized using elemental anal. and spectral techniques.

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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 《New synthesis of serotonin》. Authors are Noland, Wayland E.; Hovden, Robert A..The article about the compound:3-Methyl-1H-pyrrolecas:616-43-3,SMILESS:CC1=CNC=C1).Name: 3-Methyl-1H-pyrrole. Through the article, more information about this compound (cas:616-43-3) is conveyed.

Dropwise addition of a molar excess of nitroethylene to molten 5-benzyloxyindole at steam bath temperature 1.83 hrs. gave 3-(2-nitroethyl)-5-benzyloxyindole (I), m. 93.5-5.0° (CH2Cl2-ligroine), in 45% yield. Use of excess nitroethylene is desirable since unreacted 5-benzyloxyindole (36%) and 64% I form a eutectic mixture, m. 81-1.5°. Similar reactions of 5-benzyloxyindole with equimolar portions of β-nitrostyrene 6 hrs. and β-methyl-β-nitrostyrene for 22 hrs. gave 72 and 37% yields, resp., of 3-(1-phenyl-2-nitroethyl)-5-benzyloxyindole (II), platelets, m. 117-18° (alc.), and 3-(1-phenyl-2-nitropropyl)-5-benzyloxyindole (III), m. 152-2.5° (alc.). Hydrogenation at 2 atm. over PtO2 of I-III gave in high yields the corresponding tryptamines, isolated as the picrates. I gave 84% yield as reddish orange crystals, m. 231.5-2.0° (decomposition). III gave 94% yield, red crystals, m. 176-6.5° (alc.) and III gave 62% yield, red crystals, m. 213-15°. The tryptamine from I was characterized as the hydrochloride, m. 245-7° (decomposition). Hydrogenation of I at 2 atm. over 10% Pd-C resulted in concomitant reduction of the NO2 group and debenzylation to give 69% serotonin (IV) as the creatinine sulfate hydrate, m. 212-14°. This new synthesis of IV from 5-benzyloxyindole appeared to be higher in over-all yield than most reported methods. It was also simpler than previously described methods.

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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

Benincori, Tiziana; Brenna, Elisabetta; Sannicolo, Franco; Zotti, Gianni; Zecchin, Sandro; Schiavon, Gilberto; Gatti, Carlo; Frigerio, Giovanni published the article 《Steric and Electronic Effects in Methyl-Substituted 2,2′-Bipyrroles and Poly(2,2′-Bipyrrole)s: Part I. Synthesis and Characterization of Monomers and Polymers》. Keywords: electrochem polymerization bipyrrole; methyl substituent polypyrrole elec property.They researched the compound: 3-Methyl-1H-pyrrole( cas:616-43-3 ).Category: chiral-oxygen-ligands. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:616-43-3) here.

The effects of N- and C-Me substitution on the elec. and spectral properties of pyrrole, 2,2′-bipyrrole, and the corresponding polymers were investigated. A whole series of monomethyl and N- or Cβ-dimethyl-substituted 2,2′-bipyrroles was synthesized, and the electrochem. and spectral properties of all the compounds were investigated under identical testing conditions. The corresponding polymers were prepared by electrochem. anodic oxidation under comparable exptl. conditions and their spectroscopic and conductivity properties evaluated for comparison. The higher degree of efficiency in transmission of electronic effects associated with Me substitution at Cβ with respect to substitution at N was clearly demonstrated. The influence of the symmetry of the starting monomer (C2v or Cs) on the elec. properties of the resulting polymers is discussed.

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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

Snyder, Kristin R.; Murray, Thomas F.; DeLander, Gary E.; Aldrich, Jane V. published an article about the compound: cis-4-Aminocyclohexane carboxylic acid( cas:3685-23-2,SMILESS:N[C@H]1CC[C@H](CC1)C(O)=O ).Name: cis-4-Aminocyclohexane carboxylic acid. 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:3685-23-2) through the article.

4-Aminocyclohexanecarboxylic acid (I) was synthesized by catalytic hydrogenation of p-aminobenzoic acid, and the cis and trans isomers were separated by fractional recrystallization Analogs of dynorphin A(1-13)amide containing cis- and trans-I were prepared by solid-phase peptide synthesis using the 9-fluorenylmethoxycarbonyl (Fmoc) chem. protocol. Results from radioligand binding assays indicated that the peptides have modest affinity for κ opioid receptors and modest κ-receptor selectivity. These analogs containing cis- and trans-I are the first reported dynorphin A analogs constrained in the message sequence that are selective for κ receptors. The analog containing cis-I showed very weak opioid activity in the guinea pig ileum.

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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

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, ChemistrySelect called Structure-Catalytic Activity in a Series of Push-Pull Dicyanopyrazine/Dicyanoimidazole Photoredox Catalysts, Author is Hlouskova, Zuzana; Tydlitat, Jiri; Kong, Manman; Pytela, Oldrich; Mikysek, Tomas; Klikar, Milan; Almonasy, Numan; Dvorak, Miroslav; Jiang, Zhiyong; Ruzicka, Ales; Bures, Filip, which mentions a compound: 56413-95-7, SMILESS is N#CC1=NC(Cl)=C(Cl)N=C1C#N, Molecular C6Cl2N4, COA of Formula: C6Cl2N4.

A series of dicyanopyrazine and dicyanoimidazole derived push-pull mols. have been prepared and further investigated as photoredox catalysts. The fundamental properties of the catalysts were studied by DSC, X-ray anal., absorption/emission spectra, and electrochem. and were completed with the DFT results. The catalytic activity has been evaluated in visible light induced α-functionalization of amines (cross-dehydrogenative coupling and annulation reaction of tetrahydroisoquinolines). Thorough structure-property-catalytic activity relationships were elucidated. The developed series of tailored organic photoredox catalysts allows synthetic chemists to perform desired reactions under sustainable and mild conditions employing solely visible light as a source of energy.

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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