Author: tianli

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.Zhao, Hui; Li, Yang; Zhu, Xiao-Qing researched the compound: Pyridine-3,5-dicarbonitrile( cas:1195-58-0 ).SDS of cas: 1195-58-0.They published the article 《Thermodynamic Parameters of Elementary Steps for 3,5-Disubstituted 1,4-Dihydropyridines To Release Hydride Anions in Acetonitrile》 about this compound( cas:1195-58-0 ) in ACS Omega. Keywords: dihydropyridine hydride ion source thermodn. We’ll tell you more about this compound (cas:1195-58-0).

A series of 3,5-disubstituted 1,4-dihydropyridine derivatives including the derivative with two chiral centers, 6H (R2 = CH3, CH2Ph), as a new type of organic hydride source were synthesized and characterized. The thermodn. driving forces (defined as enthalpy changes or standard redox potentials) of the 6 elementary steps for the organic hydrides to release hydride ions in acetonitrile were measured by isothermal titration calorimeter and electrochem. methods. The impacts of the substituents and functional groups bearing the N1 and C3/C5 positions on the thermodn. driving forces of the 6 elementary steps were examined and analyzed. Moreover, the results showed that the reaction mechanism between the chiral organic hydride and activated ketone (Et benzoylformate) was identified as the concerted hydride transfer pathway based on the thermodn. anal. platform. These valuable and crucial thermodn. parameters will provide a broadly beneficial impact on the applications of 3,5-disubstituted 1,4-dihydropyridine derivatives in organic synthesis and pharmaceutical chem.

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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: Dichloro(1,5-cyclooctadiene)platinum(II), is researched, Molecular C8H12Cl2Pt, CAS is 12080-32-9, about Bimetallic Platinum Group Complexes of a Macrocyclic Pyrazolate/NHC Hybrid Ligand.Safety of Dichloro(1,5-cyclooctadiene)platinum(II).

Authors present the synthesis, structural characterization, and photophys. properties of dinuclear PdII and PtII-NHC complexes Pd2L(PF6)2 and Pt2L(PF6)2 based on a macrocyclic calix[4]imidazolylidene[2]pyrazolate ligand obtained by in situ deprotonation of the tetraimidazolium salt H6L(PF6)4. The PtII congener was also prepared by transmetalation from previously published AgI pillarplex Ag8L2(PF6)4. NMR spectroscopy (1H, 13C, 195Pt) combined with SC-XRD studies elucidated the structure of the PdII and PtII complexes in the solid state and in solution The d8 metal ions of both congeners are coordinated in a slightly distorted square-planar arrangement. Similar to the previously reported NiII complex Ni2L(PF6)2, the heavier metal homologues adopt a bent, saddle-shaped structure. As observed for structurally similar PtII complexes in solution, bimetallic Pt2L(PF6)2 showed photoluminescence in the blue region. In the solid state, emission was observed at a similar energy with unusually short lifetimes compared to other monometallic PtII complexes. DFT and TDDFT studies shed light on the nature of the most bathochromic transitions, suggesting a significant pyrazolate- and NHC-centered π-π* character.

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SDS of cas: 12080-32-9. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Dichloro(1,5-cyclooctadiene)platinum(II), is researched, Molecular C8H12Cl2Pt, CAS is 12080-32-9, about Laser-induced deposition of plasmonic Ag and Pt nanoparticles, and periodic arrays. Author is Mamonova, Daria V.; Vasileva, Anna A.; Petrov, Yuri V.; Danilov, Denis V.; Kolesnikov, Ilya E.; Kalinichev, Alexey A.; Bachmann, Julien; Manshina, Alina A..

Surfaces functionalized with metal nanoparticles (NPs) are of great interest due to their wide potential applications in sensing, biomedicine, nanophotonics, etc. However, the precisely controllable decoration with plasmonic nanoparticles requires sophisticated techniques that are often multistep and complex. Here, we present a laser-induced deposition (LID) approach allowing for single-step surface decoration with NPs of controllable composition, morphol., and spatial distribution. The formation of Ag, Pt, and mixed Ag-Pt nanoparticles on a substrate surface was successfully demonstrated as a result of the LID process from com. available precursors. The deposited nanoparticles were characterized with SEM, TEM, EDX, X-ray diffraction, and UV-VIS absorption spectroscopy, which confirmed the formation of crystalline nanoparticles of Pt (3-5 nm) and Ag (ca. 100 nm) with plasmonic properties. The advantageous features of the LID process allow us to demonstrate the spatially selective deposition of plasmonic NPs in a laser interference pattern, and thereby, the formation of periodic arrays of Ag NPs forming diffraction grating.

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SDS of cas: 7661-33-8. 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: 1-(4-Chlorophenyl)pyrrolidin-2-one, is researched, Molecular C10H10ClNO, CAS is 7661-33-8, about Mild and Efficient Cobalt-Catalyzed Cross-Coupling of Aliphatic Amides and Aryl Iodides in Water. Author is Tan, Bryan Yong-Hao; Teo, Yong-Chua.

A convenient protocol for the C-N cross-coupling of aliphatic amides and iodobenzene is demonstrated using a simple and inexpensive Co(C2O4)·2H2O/N,N’-dimethylethylenediamine (DMEDA) catalytic system in water. Good yields of N-arylated products I [R1 = Pr, i-Pr, Bu, etc; R2 = Ph, 2-F-C6H4, 4-Me-C6H4, etc.] were isolated (up to 85%) and the protocol has been successfully applied to the synthesis of the anticancer drug, flutamide.

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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: 3-Bromo-4-chloronitrobenzene, is researched, Molecular C6H3BrClNO2, CAS is 16588-26-4, about 4-Substituted 1-Chloro-2-nitrobenzenes: Structure-Activity Relationships and Extension of the Substrate Model of Rat Glutathione S-Transferase 4-4.SDS of cas: 16588-26-4.

In the present study, eleven 4-substituted 1-chloro-2-nitrobenzenes were tested for their GSH conjugation capacity when catalyzed by base or rat glutathione S-transferase (GST) 4-4. Kinetic parameters (ks and Km, kcat, and kcat/Km) were determined and subsequently used for the description of structure-activity relationships (SAR’s). For this purpose, eight physicochem. parameters (electronic, steric, and lipophilic) of the substituents and five computer-calculated parameters of the substrates (charge distributions and several energy values) were used in regression analyses with the kinetic parameters. The obtained SAR’s are compared with corresponding SAR’s for the GSH conjugation of 2-substituted 1-chloro-4-nitrobenzenes, previously determined [van der Aar et al. (1996) Chem. Res. Toxicol. 9, 527-534]. The kinetic parameters of the 4-substituted 1-chloro-2-nitrobenzenes correlated well with the Hammett σp- constant: the Hammett σp constant corrected for “”through resonance”” while the corresponding kinetic parameters of the 2-substituted 1-chloro-4-nitrobenzenes did not. The base- and GST 4-4-catalyzed GSH conjugation reactions of 2-substituted 1-chloro-4-nitrobenzenes depend to a different extent on the electronic properties of the ortho substituents, suggesting the involvement of different rate-limiting transition states. The base- and GST 4-4-catalyzed conjugation of 4-substituted 1-chloro-2-nitrobenzenes, however, showed a similar dependence on the electronic properties of the para substituents, indicating that these substrates are conjugated to GSH via a similar transition state. Multiple regression analyses revealed that, besides electronic interactions, also steric and lipophilic restrictions appeared to play an important role in the GST 4-4-catalyzed GSH conjugation of 4-substituted 1-chloro-2-nitrobenzenes. Finally, the 4-substituted 1-chloro-2-nitrobenzenes were also used to extend the previously described substrate model for GST 4-4 [De Groot et al. (1995) Chem. Res. Toxicol. 8, 649-658], by which a specific steric restriction of substrates for GST 4-4 became clear.

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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Dichloro(1,5-cyclooctadiene)platinum(II), is researched, Molecular C8H12Cl2Pt, CAS is 12080-32-9, about Platinum(II) Complexes with 10-(Aryl)phenoxarsines: Synthesis, Cis/Trans Isomerization, and Luminescence, the main research direction is platinum arylphenoxarsine complex preparation luminescence cis trans isomerism; frontier mol orbital platinum arylphenoxarsine complex; crystal structure platinum arylphenoxarsine complex.Name: Dichloro(1,5-cyclooctadiene)platinum(II).

Synthesis and structural and photophys. characterization of platinum dihalogenide complexes formulated as [PtHal2L2], where Hal = Cl and I, with different 10-(aryl)phenoxarsine ligands such as 10-(p-chlorophenyl)phenoxarsine, 10-(p-tolyl)phenoxarsine, and 10-(phenyl)phenoxarsine are reported. The structures of complexes were determined by NMR spectroscopy, mass spectrometry, and X-ray anal. Cis/trans isomerism of the complexes in solution was studied by NMR spectroscopy. In the solid state, under UV irradiation, platinum diiodide trans complexes exhibit an intense orange-red emission, which was attributed to a metal halide-centered triplet state. The UV/vis absorption and emission properties were studied and rationalized by d. functional theory (DFT) and time-dependent DFT calculations

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Application of 7661-33-8. 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: 1-(4-Chlorophenyl)pyrrolidin-2-one, is researched, Molecular C10H10ClNO, CAS is 7661-33-8, about Condensation of aniline, o-phenylenediamine, and their derivatives with lactones. Author is Shazhenov, A. A.; Kadyrov, Ch. Sh.; Kurbanov, P..

Heating equimol. amounts of RNH2 and γ-butyrolactone at 130-305° gave 2-pyrrolidinones (I) (R and % yield given): Ph, 80; m-MeC6H4, 75; p-MeC6H4, 78; m-BrC6H4, 60; α-naphthyl, 14; m-CF3C6H4, 19; p-ClC6H4, 77; β-naphthyl, 62. Boiling a mixture of equimol. amounts of substituted aromatic o-diamines and γ- or β-lactones in xylene gave the following 3-(2-benzimidazolyl)-1-alkanoles (II) (R1, R2, X, and % yield given): H, CCl3, CH2, 61; Cl, CCl3, CH2, 85; Me, CCl3, CH2, 87; H, H, (CH2)2, 80; Cl, H, (CH2)2, 24; Me, H, (CH2)2, 31; H, Me, (CH2)2, 78; H, Pr, (CH2)2, 78; Cl, Pr, (CH2)2, 7; Me, Pr, (CH2)2, 13; H, Bu, (CH2)2, 75; Cl, Bu, (CH2)2, 17; H, C7H15, (CH2)2, 66; H, H, CHOHCMe2, 50; H, H, CHAcCH2, 40; Cl, H, CHAcCH2, 16. Uv data for II are given.

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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: 3-Bromo-4-chloronitrobenzene, is researched, Molecular C6H3BrClNO2, CAS is 16588-26-4, about GDC-0449-A potent inhibitor of the hedgehog pathway.SDS of cas: 16588-26-4.

SAR for a wide variety of heterocyclic replacements for a benzimidazole led to the discovery of functionalized 2-pyridyl amides as novel inhibitors of the hedgehog pathway. The 2-pyridyl amides were optimized for potency, PK, and drug-like properties by modifications to the amide portion of the mol. resulting in I (GDC-0449). Amide I produced complete tumor regression at doses as low as 12.5 mg/kg BID in a medulloblastoma allograft mouse model that is wholly dependent on the Hh pathway for growth and is currently in human clin. trials, where it is initially being evaluated for the treatment of BCC.

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Lv, Xin; Bao, Weiliang published the article 《A β-Keto Ester as a Novel, Efficient, and Versatile Ligand for Copper(I)-Catalyzed C-N, C-O, and C-S Coupling Reactions》. Keywords: arylamide preparation copper catalyzed coupling keto ester ligand; arylimidazole preparation copper catalyzed coupling keto ester ligand; aryl ether preparation copper catalyzed coupling keto ester ligand; copper catalyzed coupling keto ester ligand aryl thioether preparation.They researched the compound: 1-(4-Chlorophenyl)pyrrolidin-2-one( cas:7661-33-8 ).Electric Literature of C10H10ClNO. 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:7661-33-8) here.

Employing Et 2-oxocyclohexanecarboxylate as a novel, efficient, and versatile ligand, the copper-catalyzed coupling reactions of various N/O/S nucleophilic reagents with aryl halides could be successfully carried out under mild conditions. A variety of products including N-arylamides, N-arylimidazoles, aryl ethers, and aryl thioethers were synthesized in good to excellent yields.

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Unsinn, Andreas; Wunderlich, Stefan H.; Knochel, Paul published the article 《Accelerated Zincations for an Efficient and Mild Functionalization of Aromatics and Heterocycles》. Keywords: arene heteroarene functionalization accelerated zincation acylation Negishi.They researched the compound: tert-Butyl 5-bromo-1H-indazole-1-carboxylate( cas:651780-02-8 ).Application In Synthesis of tert-Butyl 5-bromo-1H-indazole-1-carboxylate. 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:651780-02-8) here.

An improved process for the preparation of aromatic and heteroaromatic diorganozinc reagents and their subsequent reaction with electrophiles is presented. The new method, featuring the use of a 2,2,6,6-tetramethylpiperidyl (TMP) magnesium base in the presence of zinc chloride, is superior to the previous methods, which require the preparation of zinc bases. Specifically, the shorter reaction times under mild conditions provide an easier and more practical process, while the use of only a slight excess of the amide allows the isolation of products in high yields. These improvements are particularly significant for the large-scale preparation of organozincs and their subsequent reactions. Remarkably, beside the high kinetic activity, a wide range of functional groups is tolerated and sensitive heteroaromatics can easily be converted into the corresponding organometallic reagents and reacted with various electrophiles.

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