Author: tianli

Application of 651780-02-8. 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: tert-Butyl 5-bromo-1H-indazole-1-carboxylate, is researched, Molecular C12H13BrN2O2, CAS is 651780-02-8, about Accelerated Zincations for an Efficient and Mild Functionalization of Aromatics and Heterocycles. Author is Unsinn, Andreas; Wunderlich, Stefan H.; Knochel, Paul.

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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Kukalenko, S. S.; Gracheva, N. A. published the article 《New synthesis of N-aryl- and N-alkylpyrrolidones, and some of their properties》. Keywords: aryl pyrrolidinones.They researched the compound: 1-(4-Chlorophenyl)pyrrolidin-2-one( cas:7661-33-8 ).Reference of 1-(4-Chlorophenyl)pyrrolidin-2-one. 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.

N-Aryl pyrrolidinones (I) [R = 2,3-Me2C6H3, 2-ClC6H4, 4-ClC6H4, 3,4-Cl2C6H3, 4-BrC6H4, and 2,4-(MeO)BrC6H3] were prepared with 85-98% yield by heating equimolar amounts of γ-butyrolactone (II) and hydrochlorides of primary aromatic amines at 60-210° for 4-20 hr. The reaction of II with hydrochlorides of aliphatic amines proceeds with difficulty and the yield of the corresponding N-alkyl pyrrolidinones is 20-33%. All the pyrrolidinones are active fungicides.

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HPLC of Formula: 12080-32-9. 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: Dichloro(1,5-cyclooctadiene)platinum(II), is researched, Molecular C8H12Cl2Pt, CAS is 12080-32-9, about Multifunctional Pt(II)-Based Metallo-Supramolecular Polymer with Carboxylic Acid Groups: Electrochemical, Mechanochemical, Humidity, and pH Response. Author is Chakraborty, Chanchal; Rana, Utpal; Moriyama, Satoshi; Higuchi, Masayoshi.

We report multifunctional Pt(II)-based metallo-supramol. polymer with carboxylic acid groups (polyPtC). The polymer showed multi-stimuli-responsive emission to electrochem. redox, mech. force, humidity, and pH. It also exhibited humidity-responsive ionic conductivity Furthermore, it displayed electrofluorochromism. The emission switching between the two transition states (3MLCT/3LLCT and 3MMLCT) was based on the reversible changes of the interchain Pt-Pt interaction in polyPtC, which was caused by the secondary interaction or the crystalline-amorphous transition. The ionic conductivity of polyPtC was responsible for the humidity and the real-time humidity sensor with the polymer film was demonstrated on interdigitated Pt-electrodes. A solid-state electrochromic device with the polymer film was successfully fabricated to show reversible yellow-to-black electrochromism. In addition, it was revealed by the electrofluorochromic study that the pristine 3MLCT/3LLCT emission was quenched in the electrochem. reduced state (the black state), because the radical anion species of the ligand (tpy·-) generated at the neg. potential caused the repulsion among the polymer chains, expanded the Pt-Pt distance, and prevented the emission.

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The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: tert-Butyl 5-bromo-1H-indazole-1-carboxylate(SMILESS: CC(C)(C)OC(=O)N1N=CC2=CC(Br)=CC=C12,cas:651780-02-8) is researched.Product Details of 12080-32-9. The article 《Discovery of inhibitors of plasminogen activator inhibitor-1: Structure-activity study of 5-nitro-2-phenoxybenzoic acid derivatives》 in relation to this compound, is published in Bioorganic & Medicinal Chemistry Letters. Let’s take a look at the latest research on this compound (cas:651780-02-8).

Two novel series of 5-nitro-2-phenoxybenzoic acid derivatives are designed as potent PAI-1 inhibitors using hybridization and conformational restriction strategy in the tiplaxtinin and piperazine chemo types. The lead compounds 5a, 6c, and 6e exhibited potent PAI-1 inhibitory activity and favorable oral bioavailability in the rodents.

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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.Radhakrishna, Latchupatula; Kunchur, Harish S.; Namdeo, Pavan K.; Butcher, Ray J.; Balakrishna, Maravanji S. researched the compound: Dichloro(1,5-cyclooctadiene)platinum(II)( cas:12080-32-9 ).Product Details of 12080-32-9.They published the article 《New 1,2,3-triazole based bis- and trisphosphine ligands: synthesis, transition metal chemistry and catalytic studies》 about this compound( cas:12080-32-9 ) in Dalton Transactions. Keywords: crystal structure transition metal complex containing triazolebisphosphine triazoletrisphosphine ligand; mol structure transition metal complex containing triazolebisphosphine triazoletrisphosphine ligand; transition metal complex containing triazolebisphosphine ligand preparation Heck catalyst; Heck reaction aryl bromide alkene metal triazolephosphine catalyst. We’ll tell you more about this compound (cas:12080-32-9).

The syntheses and transition metal chem. of triazole-based bis- and tris-phosphines, 5-(diphenylphosphanyl)-1-(2-(diphenylphosphanyl)phenyl)-4-phenyl-1H-1,2,3-triazole (2), 5-(diphenylphosphanyl)-4-(2-(diphenylphosphanyl)phenyl)-1-phenyl-1H-1,2,3-triazole (5), 1,4-bis(2-(diphenylphosphanyl)phenyl)-1H-1,2,3-triazole (6) and 5-(diphenylphosphanyl)-1,4-bis(2-(diphenylphosphanyl)phenyl)-1H-1,2,3-triazole (7), are described. Bisphosphines 5 and 6 show versatile coordination behavior due to the presence of at least four donor atoms. The reactions of 5 and 6 with Group VI metal carbonyl derivatives are highly sensitive to the reaction conditions. Bisphosphine 5 upon treatment with [M(CO)4(piperidine)2] (M = Mo and W) yielded both P,P and P,N coordinated complexes [M(CO)4(5)] [M = Mo-κ2-P,N (8); W-κ2-P,N (9); Mo-κ2-P,P (10); W-κ2-P,P (11)], whereas 6 afforded only P,N coordinated complexes [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))CH}-κ2-P,N}Mo(CO)4] (12) and [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))CH}-κ2-P,N}W(CO)4] (13). The reactions of 5 with [M(COD)Cl2] (M = Pd and Pt) yielded κ2-P,P chelate complexes 14 and 15, resp., whereas the treatment of 6 with [Pd(COD)Cl2] at ambient temperature gave a rare fused six-membered PCP pincer complex [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))C}-κ3-P,C,P}PdCl] (16). Similar reactions of 6 with [NiCl2(DME)] and [Pt(COD)Cl2] in the presence of LiHMDS yielded [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))C}-κ3-P,C,P}NiCl] (17) and [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))C}-κ3-P,C,P}PtCl] (18), resp. The reaction between 6 and [M(COD)Cl]2 (M = Rh and Ir) produced cationic complexes [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))CH}-κ2-P,N}Rh(C8H12)]Cl (19) and [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))CH}-κ2-P,N}Ir(C8H12)]Cl (20), resp., whereas the reaction with [Rh(acac)(CO)2] resulted in a pincer complex [{o-Ph2P(C6H4){1,2,3-N3C(o-Ph2P(C6H4))C}-κ3-P,C,P}Rh(CO)] (21). The structures of most of the compounds were determined by single crystal x-ray analyses. The fused six-membered PCP Pd pincer complex 16 is an excellent catalyst for the Mizoroki-Heck coupling reaction.

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Category: alcohols-buliding-blocks. 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. Compound: Dichloro(1,5-cyclooctadiene)platinum(II), is researched, Molecular C8H12Cl2Pt, CAS is 12080-32-9, about Synthesis and structure of thienyl Fischer carbene complexes of PtII for application in alkyne hydrosilylation.

Transmetalation of Group 6 thienylene Fischer carbene complexes to Pt(II) precursors yielded new examples of neutral Pt(II) bisethoxycarbene complexes with either 2-thienyl (T) or 5-thieno[2,3-b]thienylene (TT) carbene substituents. The use of analogous aminocarbene group 6 precursors proceeded to give isomeric Pt(II) product mixtures where the resultant bisaminocarbene ligands displayed different orientations due to restricted rotation around the Pt-aminocarbene bond caused by the sterically demanding TT substituents. The well-defined Pt(II) ethoxycarbene complexes were screened as catalyst precursors in the benchmark hydrosilylation reaction employing phenylacetylene and triethylsilane substrates. Marked selectivity for the β-E isomer (E)-triethyl(styryl)silane was observed, and the (pre)catalysts proved recyclable, active in solvent-free reactions, and displaying a high alkyne functional group tolerance.

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Category: alcohols-buliding-blocks. 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. Compound: 6-Bromo-5-iodopyridin-3-amine, is researched, Molecular C5H4BrIN2, CAS is 697300-68-8, about 5-Substituted Derivatives of 6-Halogeno-3-((2-(S)-azetidinyl)methoxy)pyridine and 6-Halogeno-3-((2-(S)-pyrrolidinyl)methoxy)pyridine with Low Picomolar Affinity for α4β2 Nicotinic Acetylcholine Receptor and Wide Range of Lipophilicity: Potential Probes for Imaging with Positron Emission Tomography.

Potential positron emission tomog. (PET) ligands with low picomolar affinity at the nicotinic acetylcholine receptor (nAChR) and with lipophilicity (log D) ranging from -1.6 to +1.5 have been synthesized. Most members of the series, which are derivatives of 5-substituted-6-halo-A-85380, exhibited a higher binding affinity at α4β2-nAChRs than epibatidine. An anal., by mol. modeling, revealed an important role of the orientation of the addnl. heterocyclic ring on the binding affinity of the ligands with nAChRs. The existing nicotinic pharmacophore models do not accommodate this finding. Two compounds of the series, 6-[18F]fluoro-5-(3-pyridinyl)-A-85380 (I) and 6-chloro-3-[[2-(S)-azetidinyl]methoxy]-5-[(2-[18F]fluoro-5-pyridinyl)pyridine], were radiolabeled with 18F. Comparison of PET data for [18F]-I and 2-[18F]FA shows the influence of lipophilicity on the binding potential. Recent PET studies with [18F]-I demonstrated that its binding potential values in Rhesus monkey brain were ca. 2.5 times those of 2-[18F]FA. Therefore, [18F]35 and several other members of the series, when radiolabeled, will be suitable for quant. imaging of extrathalamic nAChRs.

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Application of 16588-26-4. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 3-Bromo-4-chloronitrobenzene, is researched, Molecular C6H3BrClNO2, CAS is 16588-26-4, about Continuous Flow Nucleophilic Aromatic Substitution with Dimethylamine Generated in Situ by Decomposition of DMF. Author is Petersen, Trine P.; Larsen, Anders F.; Ritzen, Andreas; Ulven, Trond.

A safe, practical, and scalable continuous flow protocol for the in situ generation of dimethylamine from DMF followed by nucleophilic aromatic substitution of a broad range of aromatic and heteroaromatic halides is reported.

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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.Bhunia, Subhajit; De, Subhadip; Ma, Dawei researched the compound: 1-(4-Chlorophenyl)pyrrolidin-2-one( cas:7661-33-8 ).Formula: C10H10ClNO.They published the article 《Room Temperature Cu-Catalyzed N-Arylation of Oxazolidinones and Amides with (Hetero)Aryl Iodides》 about this compound( cas:7661-33-8 ) in Organic Letters. Keywords: aryl oxazolidinone preparation arylamide copper catalyst; oxazolidinone amide heteroaryl iodide arylation. We’ll tell you more about this compound (cas:7661-33-8).

N,N′-Bis(pyridin-2-ylmethyl)oxalamide (BPMO) was found to be an apposite promoter for the Cu-catalyzed N-arylation of oxazolidinones and primary and secondary amides with (hetero)aryl iodides at room temperature Excellent chemoselectivity reached between aryl iodides and aryl bromides, and a wide range of functional groups tolerated the reaction conditions, which led to the formation of greatly diverse N-arylation products.

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HPLC of Formula: 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 Synthesis and metal complexes of a tertiary phosphine, 2-(2-(diphenylphosphaneyl)-1H-imidazol-1-yl)pyridine containing pyridyl and imidazole moieties. Author is Kumar, Saurabh; Balakrishna, Maravanji S..

A tertiary phosphine, [2-{PPh2C3H2N2}C5H4N] (2), containing both imidazole and pyridine moieties was synthesized by the reaction of 2-(1H-imidazol-1-yl)pyridine (1) with BuLi followed by the addition of PPh2Cl. Reactions of 2 with Group 6 metal carbonyls and Group 10 metal salts resulted in chelate complexes [{2-{PPh2C3H2N2}C5H4N}{M(CO)4}] (3, M = Mo; 4, M = W) and [{2-{PPh2C3H2N2}C5H4N}{MCl2}] (5, M = Pd; 6, M = Pt). However, 1:1 reactions of 2 with CuX (X = Cl, Br, I) yielded dinuclear complexes [{2-{PPh2C3H2N2}C5H4N}{CuX}]2 (7, X = Cl; 8, X = Br; 9, X = I) containing [Cu(μ-X)]2 rhombus units, whereas the reaction between 2 and [Cu(NCMe)4]BF4 produced a spirocyclic complex, [{2-{PPh2C3H2N2}C5H4N}2Cu]BF4 (10). The mol. structures of complexes 4, 6 and 8 were determined using x-ray diffraction studies. Upon coordination, the bite angle of the ligand varies from 78.76(6)° (4) to 96.16(2)° (8) due to inherent flexibility associated with the ligand framework as well as the geometries preferred by the metal atoms.

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