Category: 19777-66-3

Reference of (S)-Propane-1,2-diamine dihydrochloride. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: (S)-Propane-1,2-diamine dihydrochloride, is researched, Molecular C3H12Cl2N2, CAS is 19777-66-3, about Unprecedented Asymmetric Epoxidation of Isolated Carbon-Carbon Double Bonds by a Chiral Fluorous Fe(III) Salen Complex: Exploiting Fluorophilic Effect for Catalyst Design. Author is Kobayashi, Yuki; Obayashi, Riho; Watanabe, Yuki; Miyazaki, Hiroki; Miyata, Issei; Suzuki, Yuta; Yoshida, Yukihiro; Shioiri, Takayuki; Matsugi, Masato.

The first asym. epoxidation of isolated carbon-carbon double bonds by a chiral salen complex using ubiquitous Fe(III) as a center-metal was described. By simultaneously introducing fluorous tags and tert-Bu groups into the ligand of the salen complex, asym. epoxidation was achieved. The fluorous tags act as both the electron-withdrawing groups, to improve the catalytic activity for oxidation, and the driving force to form a unique asym. stereo environment. Crystallog. anal. of the complex revealed that the catalyst has a distinctive umbrella structure based on intramol. fluorophilic effect. This is the first example of asym. catalytic space construction that exploits fluorous space-interaction of neighboring fluorous tags.

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Safety of (S)-Propane-1,2-diamine dihydrochloride. 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: (S)-Propane-1,2-diamine dihydrochloride, is researched, Molecular C3H12Cl2N2, CAS is 19777-66-3, about From Mesocates to Helicates: Structural, Magnetic and Chiro-Optical Studies on Nickel(II) Supramolecular Assemblies Derived from Tetradentate Schiff Bases. Author is Mayans, Julia; Font-Bardia, Merce; Di Bari, Lorenzo; Arrico, Lorenzo; Zinna, Francesco; Pescitelli, Gennaro; Escuer, Albert.

The systematic reactions of a family of tetradentate pyridyl/imine and quinolyl/imine racemic or enantiopure Schiff bases with Ni(NO3)2 or Ni(ClO4)2 in the presence of sodium azide yielded, as a function of the starting racemic, chiral or achiral base, a set of chiral, meso or achiral complexes. In all cases, the compounds consist of two NiII cations linked by a double azido bridge in its end-on coordination mode. All the dimers exhibit a mesocate supramol. structure and one of them, the unprecedented mix of helicate and mesocate in 2:1 ratio. The transition from mesocate to helicate conformation was reached by tuning the flexibility of the central spacers of the Schiff bases and the size of the substituents. Electronic CD (ECD) studies were performed for two pairs of enantiomers and interpreted by DFT calculations Susceptibility measurements show a ferromagnetic coupling between the NiII cations mediated by the end-on azido bridges.

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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: 19777-66-3, is researched, Molecular C3H12Cl2N2, about Stereochemical studies of adrenergic drugs. Optically active derivatives of imidazolines, the main research direction is sympatholytic methylnaphthylmethylimidazoline stereoisomer; imidazoline derivative sympatholytic; naphazoline derivative sympatholytic.Recommanded Product: 19777-66-3.

The reaction of the appropriate diaminopropane isomer with Et 1-naphthyliminoacetate-HCl [43002-67-1] gave (R)-(+)- [(R)-I] [60397-66-2] and (S)-(-)-4-methyl-2-(1-naphthylmethyl)imidazoline-HCl [(S)-I] [60397-62-8]. The parent compound, naphazoline [835-31-4], is a potent α-adrenoreceptor agonist, (R)-I and (S)-I are moderately potent antagonists (pA2 = 5.6 and 5.8, resp.) of α-adrenoreceptor compounds and had weak antihistamine activity in the rabbit aorta.

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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, Article, Journal of the American Chemical Society called A Chiral Prussian Blue Analogue Pushes Magneto-Chiral Dichroism Limits, Author is Atzori, Matteo; Breslavetz, Ivan; Paillot, Kevin; Inoue, Katsuya; Rikken, Geert L. J. A.; Train, Cyrille, which mentions a compound: 19777-66-3, SMILESS is C[C@H](N)CN.[H]Cl.[H]Cl, Molecular C3H12Cl2N2, Application of 19777-66-3.

Here magneto-chiral dichroism (MChD) detected with visible light on the chiral Prussian Blue Analog [MnII(X-pnH)(H2O)][CrIII(CN)6]·H2O (X = S, R; pn = 1,2-propanediamine) is reported. Single crystals suitable for magneto-optical measurements were grown starting from enantiopure chiral ligands. X-ray diffraction and magnetic measurements confirmed the 2D-layered structure of the material, its absolute configuration, and its ferrimagnetic ordered state below a critical temperature TC of 38 K. Absorption and MChD spectra were measured between 450 and 900 nm from room temperature down to 4 K. At 4 K the electronic spectrum features spin-allowed and spin-forbidden transitions of CrIII centers, spin-forbidden transitions of the MnII centers, and metal-to-metal charge transfer bands. The MChD spectra below the magnetic ordering temperature exhibit intense absolute configuration-dependent MChD signals. The temperature dependence of these signals closely follows the material magnetization. Under a magnetic field of 0.46 T, the most intense contribution to MChD represents 2.6% T-1 of the absorbed intensity, one of the highest values observed to date.

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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.Atzori, Matteo; Breslavetz, Ivan; Paillot, Kevin; Inoue, Katsuya; Rikken, Geert L. J. A.; Train, Cyrille researched the compound: (S)-Propane-1,2-diamine dihydrochloride( cas:19777-66-3 ).Recommanded Product: (S)-Propane-1,2-diamine dihydrochloride.They published the article 《A Chiral Prussian Blue Analogue Pushes Magneto-Chiral Dichroism Limits》 about this compound( cas:19777-66-3 ) in Journal of the American Chemical Society. Keywords: chiral prussian blue analog magnetochiral dichroism. We’ll tell you more about this compound (cas:19777-66-3).

Here magneto-chiral dichroism (MChD) detected with visible light on the chiral Prussian Blue Analog [MnII(X-pnH)(H2O)][CrIII(CN)6]·H2O (X = S, R; pn = 1,2-propanediamine) is reported. Single crystals suitable for magneto-optical measurements were grown starting from enantiopure chiral ligands. X-ray diffraction and magnetic measurements confirmed the 2D-layered structure of the material, its absolute configuration, and its ferrimagnetic ordered state below a critical temperature TC of 38 K. Absorption and MChD spectra were measured between 450 and 900 nm from room temperature down to 4 K. At 4 K the electronic spectrum features spin-allowed and spin-forbidden transitions of CrIII centers, spin-forbidden transitions of the MnII centers, and metal-to-metal charge transfer bands. The MChD spectra below the magnetic ordering temperature exhibit intense absolute configuration-dependent MChD signals. The temperature dependence of these signals closely follows the material magnetization. Under a magnetic field of 0.46 T, the most intense contribution to MChD represents 2.6% T-1 of the absorbed intensity, one of the highest values observed to date.

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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: (S)-Propane-1,2-diamine dihydrochloride, is researched, Molecular C3H12Cl2N2, CAS is 19777-66-3, about Topography of nucleic acid helices in solutions. IX. Models for the interactions of optically active diamines, amino acid amides, diamino acids, and lysyl dipeptides with nucleic acid systems.Quality Control of (S)-Propane-1,2-diamine dihydrochloride.

Mol. framework models of the complexes formed between the salts N+H3CHRCONHCH2CH2N+Me2N.2Br- (I), N+H3C(CO2-)H(CH2)nH+H3Cl- (n = 2, 3, and 4) (II), N+HEC[CH2]4N+H3]HCONHCHRCO2-Cl-, (III), and N+H3CHRCH2N+H3.2Cl- (R = Me and CO2H) (IV) and adjacent phosphate anions of a helical polynucleotide chain were examined in detail; 15-, 16-, 17-, and 18-membered rings are formed as the result of complexing the salts I-IV to the nucleic acid helix. Certain conformations are not as favorable as other. Moreover, it is possible to predict which of the two optical isomers of I-IV should interact to a greater extent with a nucleic acid helix. The results using 11 different sets of optical isomers of I-IV on three different helical structures, i.e., poly I-poly C, poly A-poly U, and calf thymus DNA, were predicted correctly and consistently.

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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: (S)-Propane-1,2-diamine dihydrochloride, is researched, Molecular C3H12Cl2N2, CAS is 19777-66-3, about The effect of π-π stacking interaction of the indole ring with the coordinated phenoxyl radical in a nickel(II)-salen type complex. Comparison with the corresponding Cu(II) complex, the main research direction is nickel copper Schiff diaminoindolylpropane diaminopropane hydroxymethoxybenzaldehyde preparation CD spectra; redox potential XANES nickel copper Schiff diaminoindolylpropane diaminopropane hydroxymethoxybenzaldehyde; frontier mol orbital nickel copper Schiff diaminoindolylpropane diaminopropane hydroxymethoxybenzaldehyde; crystal structure nickel copper Schiff diaminoindolylpropane diaminopropane hydroxymethoxybenzaldehyde complex.Category: quinoxaline.

To gain new insights into the effect of the π-π stacking interaction of the indole ring with the phenoxyl radical moiety as seen in the active form of galactose oxidase, the authors prepared Ni(II) complexes of a methoxy substituted salen-type ligand containing a pendent indole ring on the dinitrogen chelate backbone and characterized their 1-electron oxidized forms. The x-ray crystal structure anal. and the other physicochem. experiments of the Ni(II) complex revealed no significant intramol. interaction of the indole ring with the coordination plane. However, the x-ray crystal structures of the oxidized Ni(II) complex exhibited the π-π stacking interaction of the indole ring mainly with one of the two phenolate moieties. While the phenoxyl radical electron was delocalized on the two phenolate moieties in the Ni(II)-salen coordination plane, the phenolate moiety in close contact with the indole moiety was considered to be the initial oxidation locus, indicating that the indole ring interacted with the phenoxyl radical by π-π stacking. The UV-visible-NIR spectrum of the oxidized Ni(II) complex with the pendent indole ring was different from that of the complex without the side chain indole ring, but the differences were rather small in comparison with the oxidized Cu(II)-salen complexes with the π-π stacking interaction of the indole ring. Such differences are due to the electronic structure difference, the localized radical electron on one of the phenolate moieties in the oxidized Cu(II) complexes being more favorable for the π-π stacking interaction.

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Recommanded Product: (S)-Propane-1,2-diamine dihydrochloride. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: (S)-Propane-1,2-diamine dihydrochloride, is researched, Molecular C3H12Cl2N2, CAS is 19777-66-3, about HPLC detection and evaluation of chiral compounds with a laser-based chiroptical detector. Author is Liu, Yan-Song; Yu, Tim; Armstrong, Daniel W..

The sensitivity and ruggedness of chiroptical detectors have improved considerably during the past decade. The authors examine >230 chiral compounds using the latest laser-based polarimetry detector for HPLC. They also examine the relation between optical rotation at the detector wavelength of 675 nm and the sodium D line. The authors consider the sensitivity, linear dynamic range, and effect of solvent composition on rotation and its general use as an HPLC detector for chiral compounds

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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: (S)-Propane-1,2-diamine dihydrochloride( cas:19777-66-3 ) is researched.Name: (S)-Propane-1,2-diamine dihydrochloride.Repta, A. J.; Baltezor, M. J.; Bansal, P. C. published the article 《Utilization of an enantiomer as a solution to a pharmaceutical problem: application to solubilization of 1,2-bis(4-piperazine-2,6-dione)propane》 about this compound( cas:19777-66-3 ) in Journal of Pharmaceutical Sciences. Keywords: ICRF 159 solubilization enantiomer; piperazinedionepropane solubilization enantiomer. Let’s learn more about this compound (cas:19777-66-3).

An enantiomer (R)(-)-I [24613-06-7] of the cytotoxic agent (±)-1,2-bis(4-piperazine-2,6-dione)propane [(±)-I] (ICRF 159) [21416-67-1] was utilized to overcome a solubility problem in the preparation of a solution suitable for i.v. use. The enantiomers (S)(+)-I [24584-09-6] and (R)(-)-I were prepared and were about five times more soluble and melted at about 40° lower than the racemic compound This study appears to be the 1st reported instance in which the difference in the phys. properties of a racemic compound and its enantiomers was utilized to improve a pharmaceutical formulation. The expected differences in the phys. properties of racemic solids and their corresponding enantiomers are discussed briefly in relation to the 3 racemic modifications known to exist.

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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: 19777-66-3, is researched, SMILESS is C[C@H](N)CN.[H]Cl.[H]Cl, Molecular C3H12Cl2N2Journal, Article, Inorganic Chemistry called On the Nature of the Reversibility of Hydration-Dehydration on the Crystal Structure and Magnetism of the Ferrimagnet [MnII(enH)(H2O)][CrIII(CN)6]·H2O, Author is Yoshida, Yusuke; Inoue, Katsuya; Kurmoo, Mohamedally, the main research direction is manganese chromium complex hydration dehydration crystal structure magnetism.Related Products of 19777-66-3.

The authors report the synthesis, crystal structure, and thermal and magnetic properties of the two-dimensional achiral soft ferrimagnet [MnII(enH)(H2O)][CrIII(CN)6]·H2O (1), en = 1,2-diaminoethane, as well as the recyclability of the dehydration and rehydration and their influence on the crystal structure and its magnetic properties. Unlike [Mn(S-pnH)(H2O)][Cr(CN)6]·H2O (2S, pn = 1,2-diaminopropane), which is a chiral (P212121) enantiopure ferrimagnet (TC = 38 K), 1 crystallizes in the achiral orthorhombic Pcmn space group, having a similar two-dimensional square network of Mn-Cr with bridging cyanide, and 1 behaves also as a soft ferrimagnet (TC = 42 K). X-ray diffraction experiments on a single crystal of 1 indicate a transformation from a single crystal to an amorphous phase upon dehydration and partial recovery of its crystallinity upon rehydration. The dehydrated phase 1-DP exhibits long-range ordering at 75 K to a ferrimagnetic state and coercive field at 2 K of 100 Oe, which are a higher critical temperature and coercive field than for the virgin sample (HC = 60 Oe). Thermogravimetric analyses indicate that the crystallinity deteriorates upon hydration-dehydration cycling, with persistence toward the amorphous phase, as also seen by magnetization measurements. This effect is associated with an increase of statistical disorder inherent in the dehydration-rehydration process. X-ray powder diffraction suggests that 1-DP may retain order within the layers but loses coherence in the stacking of the layers.

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