Chiral oxygen ligands

Category: chiral-oxygen-ligands. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about Systematic investigation of phthalocyanines, naphthalocyanines, and their aza-analogues. Effect of the isosteric aza-replacement in the core. Author is Novakova, Veronika; Reimerova, Petra; Svec, Jan; Suchan, Daniel; Miletin, Miroslav; Rhoda, Hannah M.; Nemykin, Victor N.; Zimcik, Petr.

Zinc complexes of phthalocyanine, naphthalocyanine and their aza-analogs with alkylsulfanyl substituents were synthesized and characterized by UV-visible and MCD spectroscopy, and their redox properties were investigated using CV, DPV, and SWV approaches as well as spectroelectrochem. methods. Aggregation, photostability, singlet oxygen production, and fluorescence quantum yields of the target complexes were studied as a function of the stepwise substitution of the aromatic C-H fragments by nitrogen atoms. The electronic structure and vertical excitation energies of the target compounds were probed by DFT-PCM and TDDFT-PCM approaches. Introduction of addnl. nitrogens into the structure leads to a hypsochromic shift of the Q-band and makes the macrocycle strongly electron deficient and more photostable. The impact on the photophysics is limited. The relations between the type of macrocycle and the studied properties were defined.

If you want to learn more about this compound(5,6-Dichloropyrazine-2,3-dicarbonitrile)Category: chiral-oxygen-ligands, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(56413-95-7).

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 three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 3-Methyl-1H-pyrrole(SMILESS: CC1=CNC=C1,cas:616-43-3) is researched.Electric Literature of C5H7N. The article 《Controlling the electro-mechanical performance of polypyrrole through 3- and 3,4-methyl substituted copolymers》 in relation to this compound, is published in RSC Advances. Let’s take a look at the latest research on this compound (cas:616-43-3).

Conducting polymers such as polypyrrole are biocompatible materials used in bioelectronic applications and microactuators for mechanobiol. and soft microrobotics. The materials are commonly electrochem. synthesized from an electrolyte solution comprising pyrrole monomers and a salt, which is incorporated as the counter ion. This electrosynthesis results in polypyrrole forming a three-dimensional network with extensive crosslinking in both the alpha and beta positions, which impacts the electro-mech. performance. In this study we adopt a ‘blocking strategy’ to restrict and control crosslinking and chain branching through beta substitution of the monomer to investigate the effect of crosslinking on the electroactive properties. Me groups where used as blocking groups to minimise the impact on the pyrrole ring system. Pyrrole, 3- and 3,4-Me substituted pyrrole monomers were electro-polymerised both as homo-polymers and as a series of co-polymer films. The electroactive performance of the films was characterised by measuring their electrochem. responses and their reversible and non-reversible film thickness changes. This showed that altering the degree of crosslinking through this blocking strategy had a large impact on the reversible and irreversible volume change. These results elaborate the importance of the polymer structure in the actuator performance, an aspect that has hitherto received little attention.

If you want to learn more about this compound(3-Methyl-1H-pyrrole)Computed Properties of C5H7N, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(616-43-3).

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

Related Products of 3685-23-2. 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: cis-4-Aminocyclohexane carboxylic acid, is researched, Molecular C7H13NO2, CAS is 3685-23-2, about Competing fragmentation processes of β-substituted propanoate ions upon collision induced dissociation. Author is Le Blanc, Luc M.; Powers, Sean W.; Grossert, J. Stuart; White, Robert L..

Rationale : When subjected to collisional activation, gas-phase carboxylate ions typically undergo decarboxylation. However, alternative fragmentation processes dominate when the carboxylate group is located within certain structural motifs. In this work, the fragmentation processes of β-substituted carboxylate ions are characterized to improve correlations between reactivity and structure. Methods : Mass spectra were collected using both ion trap and triple quadrupole mass spectrometers operating in the neg. ion mode; collision induced dissociation (CID) of ions was used to study the relationship between product ions and the structures of their precursor ions. Quantum mech. computations were performed on a full range of reaction geometries at the MP2/6-311++G(2d,p)//B3LYP/6-31++G(2d,p) level of theory. Results : For a series of β-substituted carboxylate ions, a product ion corresponding to the anion of the β-substituent was obtained upon CID. Detailed computations indicated that decarboxylative elimination and at least one other fragmentation mechanism had feasible energetics for the formation of substituent anions differing in their gas-phase basicities. Predicted energetics for anti- and synperiplanar alignments in the transition structures for decarboxylative elimination correlated with the positions of crossover points in breakdown curves acquired for conformationally constrained ions. Conclusions : The feasibility of more than one mechanism was established for the fragmentation of β-substituted propanoates. The contribution of each mechanistic pathway to the formation of the substituent anion was influenced by structural variations and conformational constraints, but mostly depended on the nature of the substituent.

If you want to learn more about this compound(cis-4-Aminocyclohexane carboxylic acid)Related Products of 3685-23-2, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(3685-23-2).

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 Structure of “”unknown”” soil nitrogen investigated by analytical pyrolysis, the main research direction is organic nitrogen compound detection soil pyrolysis; hydrolysis soil detection organic nitrogen pyrolysis.Product Details of 616-43-3.

Curie-point pyrolysis-gas chromatog./mass spectrometry (Py-GC/MS) and in-source pyrolysis-field ionization mass spectrometry (Py-FIMS) were applied for the 1st time to the structural characterization of organic N in hydrolyzates and hydrolysis residues resulting from the classical 6 M HCl hydrolysis of mineral soils. Two soils of widely different origin (i.e., a Gleysol Ah and a Podzol Bh) were investigated. Py-GC/MS was performed using a N-selective detector to detect and identify N-containing pyrolysis products in the hydrolyzate (e.g., pyrazole and/or imidazole, N,N-dimethylmethanamine, benzenacetonitrile, propane- and propenenitriles) and the hydrolysis residue (e.g., pyrroles, pyridines, indoles, N-derivatives of benzene, benzothiazole, and long-chain aliphatic nitriles). Temperature-resolved Py-FIMS allowed the thermal evolution of the N-containing compounds to be recorded during pyrolysis. These were characterized by a particularly high thermostability compared to their thermal release from whole soils. The combination of pyrolysis with mass spectrometric methods permitted analyses of the identities and thermal stabilities of complex N compounds in hydrolysis residues of whole soils, which cannot be done by wet-chem. methods. Pyrolysis-methylation GC/MS with NMe4OH enabled the identification of N,N-dimethylbenzenamine and so confirmed the identification of benzeneamine by Py-GC/MS in nonmethylated hydrolysis residues. N-derivatives of benzene and long-chain nitriles are characteristic of soils, terrestrial humic substances, and hydrolysis residues and seem to be specific, stable transformation products of soil N.

If you want to learn more about this compound(3-Methyl-1H-pyrrole)Product Details of 616-43-3, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(616-43-3).

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

Recommanded Product: 5,6-Dichloropyrazine-2,3-dicarbonitrile. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 5,6-Dichloropyrazine-2,3-dicarbonitrile, is researched, Molecular C6Cl2N4, CAS is 56413-95-7, about Dicyanopyrazine-derived push-pull chromophores for highly efficient photoredox catalysis. Author is Zhao, Yu; Zhang, Chenhao; Chin, Kek Foo; Pytela, Oldrich; Wei, Guo; Liu, Hongjun; Bures, Filip; Jiang, Zhiyong.

Here, we report dicyanopyrazine (DPZ)-derived push-pull chromophores, easily prepared and tunable organic compounds, as new kinds of photoredox catalysts. In particular, the DPZ derivative H, containing 2-methoxythienyl as electron-donating moiety, exhibits a broad absorption of visible light with an absorption edge up to 500 nm and excellent redox properties, and has been demonstrated as a desirably active and efficient photoredox catalyst in four challenging kinds of photoredox reactions. The amount of catalyst in most reactions is less than 0.1 mol% and even 0.01 mol%, representing the lowest catalyst loading in the current photoredox organocatalysis.

If you want to learn more about this compound(5,6-Dichloropyrazine-2,3-dicarbonitrile)Recommanded Product: 5,6-Dichloropyrazine-2,3-dicarbonitrile, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(56413-95-7).

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: 616-43-3, is researched, SMILESS is CC1=CNC=C1, Molecular C5H7NJournal, Food Chemistry called Elucidation of the mechanism of pyrrole formation during thermal degradation of 13C-labeled L-serines, Author is Yaylayan, V. A.; Keyhani, A., the main research direction is serine Maillard reaction pyrrole pyrazine.Recommanded Product: 616-43-3.

Pyrolysis of [13C-1], [13C-2] and [13C-3]-labeled L-serines generated mono-substituted Me and Et derivatives of pyrroles and pyrazines among other compounds Analyses of label incorporation into the pyrroles have indicated their formation through aldol condensation of acetaldehyde with different α-aminocarbonyl compounds followed by cyclization and loss of water (Knorr pyrrole synthesis). Comparison of the label incorporation patterns of the α-aminocarbonyls involved in the formation of Me and ethyl-substituted pyrroles with that of similarly substituted pyrazines, revealed their common origin. In addition, α-aminocarbonyls involved in the formation of 2- and 3-substituted pyrroles had identical label distribution patterns, indicating their formation through the same carbonyl precursors. Furthermore, the major pathway (55%) leading to the formation of the α-aminocarbonyl precursors of methyl-substituted pyrroles involved aldol addition of formaldehyde to glycolaldehyde, whereas the only pathway leading to the formation of the α-aminocarbonyl precursors of ethyl-substituted pyrroles involved the interaction of alanine – formed in situ – with glycolaldehyde.

If you want to learn more about this compound(3-Methyl-1H-pyrrole)Recommanded Product: 616-43-3, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(616-43-3).

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

de la Rosa, J. M.; Gonzalez-Perez, J. A.; Gonzalez-Vila, F. J.; Knicker, H.; Araujo, M. F. published an article about the compound: 3-Methyl-1H-pyrrole( cas:616-43-3,SMILESS:CC1=CNC=C1 ).HPLC of Formula: 616-43-3. 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:616-43-3) through the article.

The mol. structural features of humic acid (HA) fractions isolated from recent sediments from the estuaries and continental platform along the Huelva littoral (SW Iberian Peninsula, Spain) were studied using complementary anal. tools. The approach included elemental anal., solid state, 13C cross polarisation magic angle spinning NMR spectroscopy (13C CP-MAS NMR), pyrolysis gas chromatog.-mass spectrometry (Py-GC/MS) and stable C and N isotopic composition (δ13C, δ15N). The results point to the presence of vascular plant matter contributing to all the HAs, even those far from the coastal area. A contribution of lignocellulose material was detected from 13C NMR signals at 152 ppm (O-aryl C), 55 ppm (methoxyl C) and 33 ppm (alkyl chain) and confirmed by the presence of lignin derived structures (methoxy phenols) in the pyrolysis chromatograms. Nevertheless, the HAs from the westernmost part of the continental platform had the lowest aromatic and the highest C-alkyl abundance (13C NMR spectroscopy). These data, combined with low C/N and high H/C values, a relative enrichment in δ13C and the presence in the pyrolyzates of conspicuous n-alkyl nitrile and amide series, together with n-alkane/ene homologues, pointed towards a relevant marine (autochthonous) contribution to this sedimentary organic matter (OM). In contrast, HAs from sediments collected from the Tinto-Odiel River mouth and Guadiana Estuary areas revealed a major input of terrestrial OM. In general, the data support the idea that the HAs still contain valuable information about the signature of aliphatic and aromatic biomacromols. contributing to the deposited OM.

If you want to learn more about this compound(3-Methyl-1H-pyrrole)HPLC of Formula: 616-43-3, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(616-43-3).

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

Quality Control of cis-4-Aminocyclohexane carboxylic acid. 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: cis-4-Aminocyclohexane carboxylic acid, is researched, Molecular C7H13NO2, CAS is 3685-23-2, about Synthesis of peptidelike derivatives of cis- and trans-4-aminocyclohexanecarboxylic acids containing sarcolysin residues. Author is Karpavicius, K.; Patockiene, L.; Knunyants, I. L..

Mixed-anhydride and dicyclohexylcarbodiimide coupling reactions of N-formysarcolysin and N-(benzyloxycarbonyl)sarcolysin with cis- and trans-4-aminocyclohexanecarboxylic acid esters and subsequent deblocking gave the cis- and trans- sarcolysylaminocyclohexanecarboxylates I (R = H, Et). Condensation of sarcolysin benzyl ester with cis- and trans-4-(benzyloxycarbonylamino)cyclohexancarboxylate and subsequent deblocking gave the cis- and trans-N-(cyclohexylcarbonyl)sarcolysins II.

If you want to learn more about this compound(cis-4-Aminocyclohexane carboxylic acid)Quality Control of cis-4-Aminocyclohexane carboxylic acid, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(3685-23-2).

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 《A suitable solvent for molecular-weight determinations according to Rast》. Authors are Wendt, Gerhard.The article about the compound:cis-4-Aminocyclohexane carboxylic acidcas:3685-23-2,SMILESS:N[C@H]1CC[C@H](CC1)C(O)=O).Recommanded Product: 3685-23-2. Through the article, more information about this compound (cas:3685-23-2) is conveyed.

The lactam (I) of cis-hexahydro-p-aminobenzoic acid (II), m. 196°, results in 3.3-g. yield from 5 g. of the mixture of cis- and trans-II. For the separation of the 2 isomers of II, the hydrogenation product from 4 g. of p-H2NC6H4CO2H in 20 cc. H2O is treated with 180 cc. absolute EtOH to precipitate 1.9 g. crude cis-II, 2 crystallizations of which from dilute EtOH give the pure acid, m. 304-5°, sublimes 210-20°/6 × 10-4 mm.; contrary to the observation of Orthner and Hein (C. A. 27, 4776) the acid melts before sublimation; their transformation of the cis to the trans acid could not be verified. Addition of 400 cc. ether to the filtrate from the cis acid gives (standing 24 hrs.) 1.9 g. crude trans acid; this is purified by solution in 10 cc. H2O and precipitation with 125 cc. absolute EtOH; it m. 186-8° (decomposition), sublimes 210-20°/3 × 10-4 mm. I is a suitable substitute for camphor in the mol.-weight determination according to Rast. The m.-p. lowering constant is 40 (the same as camphor); the molar heat of melting is 1.37 kg.-cal. (for camphor 1.55 kg.-cal.). Because of the solubility in I, it is specially suitable for the determination of the mol. weights of di- and tripeptides (e. g., Me p-aminobenzoyl-p-aminobenzoate, Me p-nitrobenzoyl-p-aminobenzoyl-p-aminobenzoate, leucylglycine, glycylleucine), disaccharides (e. g., saccharose and cellobiose) and nucleosides (e. g., uridine and adenosine), most of which are insoluble in camphor. However, certain compounds (uric acid, creatine, glycylglycine) are insoluble in I.

If you want to learn more about this compound(cis-4-Aminocyclohexane carboxylic acid)Recommanded Product: 3685-23-2, you may wish to communicate with the author of the article,or consult the relevant literature related to this compound(3685-23-2).

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

Related Products of 616-43-3. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 3-Methyl-1H-pyrrole, is researched, Molecular C5H7N, CAS is 616-43-3, about Study on porphyrin complex ligated with azaferrocene derivatives. Author is Nakashima, S.; Negishi, A.; Nakamura, J.; Okuda, T..

[5,10,15,20-Tetrakis(pentafluorophenyl)porphyrinato]iron complex ligated with azaferrocene has two crystal forms, while the corresponding complex ligated with 3-methylazaferrocene has only one crystal form. An introduction of Me substituent to the pyrrole ring makes a less stable complex.

Here is a brief introduction to this compound(616-43-3)Related Products of 616-43-3, if you want to know about other compounds related to this compound(616-43-3), you can read my other articles.

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