Author: tianli

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: 651780-02-8, is researched, SMILESS is CC(C)(C)OC(=O)N1N=CC2=CC(Br)=CC=C12, Molecular C12H13BrN2O2Journal, Article, Research Support, N.I.H., Extramural, Organic Letters called Thioetherification via Photoredox/Nickel Dual Catalysis, Author is Jouffroy, Matthieu; Kelly, Christopher B.; Molander, Gary A., the main research direction is thioether aryl heteroaryl preparation; aryl heteroaryl bromide thioetherification thiol hypervalent alkylsilicate nickel photoredox.HPLC of Formula: 651780-02-8.

Hypervalent alkylsilicates represent new and readily accessible precursors for the generation of alkyl radicals under photoredox conditions. Alkyl radicals generated from such silicates serve as effective hydrogen atom abstractors from thiols, furnishing thiyl radicals. The reactive sulfur species generated in this manner can be funneled into a nickel-mediated cross-coupling cycle employing aromatic bromides to furnish thioethers. The serendipitous discovery of this reaction and its utilization for the thioetherification of various aryl and heteroaryl bromides with a diverse array of thiols are described. The S-H selective H atom abstraction event enables a wide range of functional groups, including those bearing protic moieties, to be tolerated.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《On cyclic intermediates in substitution reactions. VII. The alkaline solvolysis of some N-aryl-4-bromobutanamides》. Authors are Heine, Harold W.; Love, Peter; Bove, John L..The article about the compound:1-(4-Chlorophenyl)pyrrolidin-2-onecas:7661-33-8,SMILESS:O=C1N(C2=CC=C(Cl)C=C2)CCC1).Electric Literature of C10H10ClNO. Through the article, more information about this compound (cas:7661-33-8) is conveyed.

cf. C.A. 49, 1556b. The rates of the solvolysis of 3 N-aryl-4-bromobutanamides have been studied in MeOH. The rates of the reaction as determined by the measurement of the release of bromide ion are 1st order with respect to MeO-. The reaction products are the corresponding pyrrolidones. These results are discussed in terms of a mechanism involving the formation and conversion of a bromoamido ion to a pyrrolidone. SOCl2 (20 cc.) added dropwise to 37.1 g. Br(CH2)3CO2H, the mixture held 2 days at room temperature, the excess SOCl2 removed in vacuo, and the residue distilled gave a distillate, b31 88-90°, nD201.4899; a 37.1-g. sample of the distillate added dropwise with stirring to 37.2 g. PhNH2 in 500 cc. CHCl3, the mixture stirred 15 min., the precipitate filtered and washed with CHCl3, the combined filtrate and washing concentrated in vacuo, and the crude residue dissolved in ligroine, b. 65-110°, cooled, and then chilled to -78° gave 38% Br(CH2)3CONHPH (I), m. 75-6°. In the same manner except with a reaction time of 4 hrs. was prepared the p-Me derivative (II) of I, m. 90-1° (from petr. ether), in 63.2% yield. The p-Cl derivative (III) of I, m. 100-1° (from petr. ether), was prepared with a reaction time of 2 hrs. in 69.2% yield. A solution (100 cc.) 0.05M in NaOMe and 0.05M in III kept at 22.9° until all bromide ion had been released, the MeOH evaporated in vacuo, the residue washed with H2O, and the residue dried at 50° and recrystallized from petr. ether (b. 30-60°) gave 0.940 g. 1-(p-chlorophenyl)pyrrolidone (IV), m. 95-7°. The average rate constants of the alk. solvolyses determined at 22.90° were: III 5.65, I 1.80, and II 1.03 × 10 l./min./mole.

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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 Platinum(II) complexes containing hydrazide-based aminophosphine ligands: Synthesis, molecular structures, computational investigation and evaluation as antitumour agents.Application of 12080-32-9.

Four new N,N-bis(diphenylphosphino)amine ligands (amine = 1-amino-4-methylpiperazine (L1), N-aminophthalimide (L2), 4-aminomorpholine (L3) and hydrazine dihydrochloride (L4)) and their Pt(II) complexes C1, C2, C3 and C4 were synthesized and characterized using IR and NMR spectroscopies. The crystal structures of C1, C2 and C3 were determined using single-crystal x-ray diffraction techniques. The antitumor activities of the synthesized complexes determined using MTT assay on MDA-MB-231 cell line revealed that the studied complexes, especially C2, significantly suppressed the proliferation of these cancer cells in a dose- and time-dependent manner (e.g. at a complex concentration of 100 μg ml-1, in 24 h, the reduction of the cell viability was 88.00, 38.89, 83.35 and 64.28% for C1-C4, resp.). Theor. approaches were also used to investigate the energy and the nature of metal-ligand and metal-chlorine interactions in the complexes, which could explain their biol. activities. The interaction between ligand and Pt is stronger in C2, while the Pt-Cl interaction is weaker in this complex in comparison with the other complexes.

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Reference of 1H-Pyrazole-4-sulfonyl chloride. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 1H-Pyrazole-4-sulfonyl chloride, is researched, Molecular C3H3ClN2O2S, CAS is 438630-64-9, about Purinylpyridinylamino-based DFG-in/αC-helix-out B-Raf inhibitors: Applying mutant versus wild-type B-Raf selectivity indices for compound profiling. Author is Liu, Longbin; Lee, Matthew R.; Kim, Joseph L.; Whittington, Douglas A.; Bregman, Howard; Hua, Zihao; Lewis, Richard T.; Martin, Matthew W.; Nishimura, Nobuko; Potashman, Michele; Yang, Kevin; Yi, Shuyan; Vaida, Karina R.; Epstein, Linda F.; Babij, Carol; Fernando, Manory; Carnahan, Josette; Norman, Mark H..

One of the challenges for targeting B-RafV600E with small mol. inhibitors had been achieving adequate selectivity over the wild-type protein B-RafWT, as inhibition of the latter has been associated with hyperplasia in normal tissues. Recent studies suggest that B-Raf inhibitors inducing the ‘DFG-in/αC-helix-out’ conformation (Type IIB) likely will exhibit improved selectivity for B-RafV600E. To explore this hypothesis, we transformed Type IIA inhibitor (1) into a series of Type IIB inhibitors (sulfonamides and sulfamides 4-6) and examined the SAR. Three selectivity indexes were introduced to facilitate the analyses: the B-RafV600E/B-RafWT biochem. (bS), cellular (cS) selectivity, and the phospho-ERK activation (pA). Our data indicates that α-branched sulfonamides and sulfamides show higher selectivities than the linear derivatives We rationalized this finding based on anal. of structural information from the literature and provided evidence for a monomeric B-Raf-inhibitor complex previously hypothesized to be responsible for the desired B-RafV600E selectivity.

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Recommanded Product: Dichloro(1,5-cyclooctadiene)platinum(II). 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 Phosphorus and Arsenic Atom Transfer to Isocyanides to Form π-Backbonding Cyanophosphide and Cyanoarsenide Titanium Complexes.

Decarbonylation along with E atom transfer from Na(OCE) (E = P, As) to an isocyanide coordinated to the tetrahedral TiII complex [(TptBu,Me)TiCl], yielded the [(TptBu,Me)Ti(η3-ECNAd)] species (Ad = 1-adamantyl, TptBu,Me- = hydrotris(3-tert-butyl-5-methylpyrazol-1-yl)borate). In the case of E = P, the cyanophosphide ligand displays nucleophilic reactivity toward Al(CH3)3; moreover, its bent geometry hints to a reduced Ad-NCP3- resonance contributor. The analogous and rarer mono-substituted cyanoarsenide ligand, Ad-NCAs3-, shows the same unprecedented coordination mode but with shortening of the N:C bond. As opposed to TiII, VII fails to promote P atom transfer to AdNC, yielding instead [(TptBu,Me)V(OCP)(CNAd)]. Theor. studies revealed the rare ECNAd moieties to be stabilized by π-backbonding interactions with the former TiII ion, and their assembly to most likely involve a concerted E atom transfer between Ti-bound OCE- to AdNC ligands when studying the reaction coordinate for E = P.

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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: 3-Bromo-4-chloronitrobenzene( cas:16588-26-4 ) is researched.SDS of cas: 16588-26-4.Jorgensen, William L.; Bollini, Mariela; Thakur, Vinay V.; Domaoal, Robert A.; Spasov, Krasimir A.; Anderson, Karen S. published the article 《Efficient Discovery of Potent Anti-HIV Agents Targeting the Tyr181Cys Variant of HIV Reverse Transcriptase》 about this compound( cas:16588-26-4 ) in Journal of the American Chemical Society. Keywords: HIV Reverse Transcriptase inhibitor antiaids pyrimidinyl benzonitrile analog preparation. Let’s learn more about this compound (cas:16588-26-4).

Non-nucleoside reverse transcriptase inhibitors (NNRTIs) that interfere with the replication of human immunodeficiency virus (HIV) are being pursued with guidance from mol. modeling including free-energy perturbation (FEP) calculations for protein-inhibitor binding affinities. The previously reported pyrimidinylphenylamine 1 (I) and its chloro analog 2 are potent anti-HIV agents; they inhibit replication of wild-type HIV-1 in infected human T-cells with EC50 values of 2 and 10 nM, resp. However, they show no activity against viral strains containing the Tyr181Cys (Y181C) mutation in HIV-RT. Modeling indicates that the problem is likely associated with extensive interaction between the dimethylallyloxy substituent and Tyr181. As an alternative, a phenoxy group is computed to be oriented in a manner diminishing the contact with Tyr181. However, this replacement leads to a roughly 1000-fold loss of activity for 3 (2.5 μM). The present report details the efficient, computationally driven evolution of 3 to novel NNRTIs with sub-10 nM potency toward both wild-type HIV-1 and Y181C-containing variants. The critical contributors were FEP substituent scans for the phenoxy and pyrimidine rings and recognition of potential benefits of addition of a cyanovinyl group to the phenoxy ring.

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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: 651780-02-8, is researched, SMILESS is CC(C)(C)OC(=O)N1N=CC2=CC(Br)=CC=C12, Molecular C12H13BrN2O2Journal, Article, Journal of the American Chemical Society called Base-Free Photoredox/Nickel Dual-Catalytic Cross-Coupling of Ammonium Alkylsilicates, Author is Jouffroy, Matthieu; Primer, David N.; Molander, Gary A., the main research direction is photoredox nickel catalyzed coupling ammonium alkylsilicate hetero aryl bromide.Recommanded Product: 651780-02-8.

Single-electron transmetalation is recognized as an enabling technol. for the mild transfer of alkyl groups to transition metal catalysts in cross-coupling reactions. Hypercoordinate silicates represent a new and improved class of radical precursors because of their low oxidation potentials and the innocuous byproducts generated upon oxidation Herein, authors report the cross-coupling of secondary and primary ammonium alkylsilicates with (hetero)aryl bromides in good to excellent yields. The base-free conditions have exceptional protic group tolerance on both partners, permitting the cross-coupling of unprotected primary and secondary amines.

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Product Details of 7661-33-8. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1-(4-Chlorophenyl)pyrrolidin-2-one, is researched, Molecular C10H10ClNO, CAS is 7661-33-8, about Cyclization of ω-halo amides to lactams. Author is Manhas, Maghar S.; Jeng, Stella J..

N-Aryl-β-bromopropionamides and -γ-bromobutyramides, where the aryl group is Ph or 3 α-cholestanyl, are treated with Na in liquid NH3 to give 1 aryl-2-azetidionones (I) (Ar = Ph, o- and p-BrC6H4, etc.) and 1-aryl-2-pyrrolidinones. Lactams are also prepared from bromo amides and NaH in Me2SO and KOBu-tert in Me2SO.

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SDS of cas: 1195-58-0. 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: Pyridine-3,5-dicarbonitrile, is researched, Molecular C7H3N3, CAS is 1195-58-0, about Electron-Deficient Heteroarenium Salts: An Organocatalytic Tool for Activation of Hydrogen Peroxide in Oxidations.

A series of monosubstituted pyrimidinium and pyrazinium triflates and 3,5-disubstituted pyridinium triflates were prepared and tested as simple catalysts of oxidations with hydrogen peroxide, using sulfoxidation as a model reaction. Their catalytic efficiency strongly depends on the type of substituent and is remarkable for derivatives with an electron-withdrawing group, showing reactivity comparable to that of flavinium salts which are the prominent organocatalysts for oxygenations. Because of their high stability and good accessibility, 4-(trifluoromethyl)pyrimidinium and 3,5-dinitropyridinium triflates are the catalysts of choice and were shown to catalyze oxidation of aliphatic and aromatic sulfides to sulfoxides, giving quant. conversions, high preparative yields and excellent chemoselectivity. The high efficiency of electron-poor heteroarenium salts is rationalized by their ability to readily form adducts with nucleophiles, as documented by low pKR+ values (pKR+ < 5) and less neg. reduction potentials (Ered > -0.5 V). Hydrogen peroxide adducts formed in situ during catalytic oxidation act as substrate oxidizing agents. The Gibbs free energies of oxygen transfer from these heterocyclic hydroperoxides to thioanisole, obtained by calculations at the B3LYP/6-311++g(d,p) level, showed that they are much stronger oxidizing agents than alkyl hydroperoxides and in some cases are almost comparable to derivatives of flavin hydroperoxide acting as oxidizing agents in monooxygenases.

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Application In Synthesis of (5aS,10bR)-2-(2,6-Diethylphenyl)-4,5a,6,10b-tetrahydro-2H-indeno[2,1-b][1,2,4]triazolo[4,3-d][1,4]oxazin-11-ium tetrafluoroborate. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: (5aS,10bR)-2-(2,6-Diethylphenyl)-4,5a,6,10b-tetrahydro-2H-indeno[2,1-b][1,2,4]triazolo[4,3-d][1,4]oxazin-11-ium tetrafluoroborate, is researched, Molecular C22H24BF4N3O, CAS is 1787246-78-9, about Intermolecular Dynamic Kinetic Resolution Cooperatively Catalyzed by an N-Heterocyclic Carbene and a Lewis Acid. Author is Wu, Zijun; Li, Fangyi; Wang, Jian.

The ubiquitous structure of δ-lactones makes the development of new methods for their enantioselective and stereoselective synthesis an important ongoing challenge. The intermol. dynamic kinetic resolution (DKR) of β-halo-α-keto esters cooperatively catalyzed by an N-heterocyclic carbene and a Lewis acid generates two contiguous stereocenters with remarkable diastereoselectivity through an oxidation/lactonization sequence. Under optimized conditions the synthesis of the target compounds was achieved using (5aS,10bR)-5a,10b-dihydro-2-(2,6-diethylphenyl)-4H,6H-indeno[2,1-b][1,2,4]triazolo[4,3-d][1,4]oxazinium tetrafluoroborate (i.e., NHC, nitrogen-heterocyclic carbene) and scandium triflate as catalyst combination. Starting materials included (2E)-3-phenyl-2-butenal and β-(bromo)-α-(oxo)benzenebutanoic acid esters.

When you point to this article, it is believed that you are also very interested in this compound(1787246-78-9)Application In Synthesis of (5aS,10bR)-2-(2,6-Diethylphenyl)-4,5a,6,10b-tetrahydro-2H-indeno[2,1-b][1,2,4]triazolo[4,3-d][1,4]oxazin-11-ium tetrafluoroborate and due to space limitations, I can only present the most important information.

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