Author: tianli

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Dichloro(1,5-cyclooctadiene)platinum(II)( cas:12080-32-9 ) is researched.Recommanded Product: Dichloro(1,5-cyclooctadiene)platinum(II).Huo, Yingpeng; Hu, Jiwen; Lin, Shudong; Ju, Xingming; Wei, Yanlong; Huang, Zhenzhu; Hu, Yangfei; Tu, Yuanyuan published the article 《Platinum(II) complexes bearing bulky Schiff base ligands anchored onto mesoporous SBA-15 supports as efficient catalysts for hydrosilylation》 about this compound( cas:12080-32-9 ) in Applied Organometallic Chemistry. Keywords: silica supported naphthalenolimine Schiff base platinum cyclooctadiene preparation catalyst; bulky Schiff base anchored mesoporous SBA 15 catalyst hydrosilylation; hydrosilylation terminal alkene styrene silane regioselectivity catalyst preparation. Let’s learn more about this compound (cas:12080-32-9).

Reported herein is an easy-to-prepare novel heterogeneous catalyst of platinum complexes bearing binary ligands of bidentate naphthalenolimine and cyclo-1,5-octadiene that are anchored onto mesoporous silica SBA-15. The presence of the binary ligands not only stabilized the platinum, but also enabled the platinum atoms to form nanoclusters with diameters of ca 1 nm, and led to high platinum loading (8.69 wt%). Moreover, the platinum catalyst exhibited high catalytic activity towards hydrosilylation of terminal alkenes and styrene with silanes under mild and solvent-free conditions, with excellent regioselectivity.

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Related Products of 7661-33-8. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 1-(4-Chlorophenyl)pyrrolidin-2-one, is researched, Molecular C10H10ClNO, CAS is 7661-33-8, about Utilization of Cyclic Amides as Masked Aldehyde Equivalents in Reductive Amination Reactions. Author is Prince, Robin J.; Gao, Fang; Pazienza, Jessica E.; Marx, Isaac E.; Schulz, Jurgen; Hopkins, Brian T..

An operationally simple protocol has been discovered that couples primary or secondary amines with N-aryl-substituted lactams to deliver differentiated diamines in moderate to high yields. The process allows for the partial reduction of a lactam in the presence of Cp2ZrHCl (Schwartz’s reagent), followed by a reductive amination between the resulting hemiaminal and primary or secondary amine. These reactions can be telescoped in a one-pot fashion to significantly simplify the operation. The scope of amines and substituted lactams of various ring sizes was demonstrated through the formation of a range of differentiated diamine products. Furthermore, this methodol. was expanded to include N-aryl pyrrolidinone substrates with an enantiopure ester group at the 5-position, and α-amino piperidinones were prepared with complete retention of stereochem. information. The development of this chem. has enabled the consideration of lactams as useful synthons.

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Related Products of 1787246-78-9. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. 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 A Carbene Catalysis Strategy for the Synthesis of Protoilludane Natural Products. Author is Hovey, M. Todd; Cohen, Daniel T.; Walden, Daniel M.; Cheong, Paul H.-Y.; Scheidt, Karl A..

The Armillaria and Lactarius genera of fungi produce the antimicrobial and cytotoxic mellolide, protoilludane, and marasmane sesquiterpenoids. We report a unified synthetic strategy to access the protoilludane, mellolide, and marasmane families of natural products. The key features of these syntheses are (1) the organocatalytic, enantioselective construction of key chiral intermediates from a simple achiral precursor, (2) the utility of a key 1,2-cyclobutanediol intermediate to serve as a precursor to each natural product class, and (3) a direct chem. conversion of a protoilludane to a marasmane (I → II) through serendipitous ring contraction, which provides exptl. support for their proposed biosynthetic relationships.

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Wang, Lei; Li, Sun; Bluemel, Marcus; Puttreddy, Rakesh; Peuronen, Anssi; Rissanen, Kari; Enders, Dieter published an article about the 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( cas:1787246-78-9,SMILESS:CCC1=C(C(CC)=CC=C1)N2N=C3[N+]([C@]4([C@@]([H])(OC3)CC5=C4C=CC=C5)[H])=C2.F[B-](F)(F)F ).Application of 1787246-78-9. 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:1787246-78-9) through the article.

A novel NHC-catalyzed annulation protocol for the asym. synthesis of biol. important β-lactam fused spirocyclopentane oxindoles with four contiguous stereocenters, including two quaternary carbon centers, was developed. Alternatively, spirocyclopentane oxindoles containing an enaminone moiety can be achieved using the same starting materials, isatin-derived enals, and N-sulfonyl ketimines, in the presence of a slightly different NHC catalytic system. This switchable annulation strategy enables the selective assembly of both heterocyclic scaffolds with good yields and excellent enantioselectivities for a broad range of substrates.

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Formula: C6H3BrClNO2. 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: 3-Bromo-4-chloronitrobenzene, is researched, Molecular C6H3BrClNO2, CAS is 16588-26-4, about Ethyl Cyanoacetate: A New Cyanating Agent for the Palladium-Catalyzed Cyanation of Aryl Halides. Author is Zheng, Shuyan; Yu, Chunhui; Shen, Zhengwu.

A new Pd-catalyzed cyanation reaction has been discovered using Et cyanoacetate as the cyanating reagent. A variety of electron-rich and electron-deficient aryl halides were efficiently converted into their corresponding nitriles in good to excellent yields.

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Synthetic Route of C8H12Cl2Pt. 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: 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. Author is Gholivand, Khodayar; Maghsoud, Yazdan; Kahnouji, Mohammad; Hosseini, Mahdieh; Satari, Mohammad; Abdolmaleki, Parviz; Roe, Stephen Mark.

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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The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 3-Bromo-4-chloronitrobenzene, is researched, Molecular C6H3BrClNO2, CAS is 16588-26-4, about Highly Active and Chemoselective Reduction of Halogenated Nitroarenes Catalyzed by Ordered Mesoporous Carbon Supported Platinum Nanoparticles, the main research direction is reduction halogenated nitroarene catalyzed carbon platinum nanoparticle.Name: 3-Bromo-4-chloronitrobenzene.

Highly dispersed Pt nanoparticles (∼2.2 nm) on ordered mesoporous carbon (Pt/CMK-3-HQ) were first prepared through a two-step impregnation route with aqueous solutions of 8-hydroxyquinoline (8-HQ) and H2PtCl6, resp. The Pt/CMK-3-HQ quant. converted various halogenated nitroarenes to the corresponding haloanilines using hydrazine hydrate with unprecedented activities (e.g., turnover frequency for o-chloronitrobenzene was 30.2 s-1) and exhibited high stability with 20 cycles without decrease in catalytic efficiency. The high activity and chemoselectivity of Pt/CMK-3-HQ were attributed to the cooperation effect between Pt and N species, promoting cleavage of hydrazine to generate more Pt-H- and N-H+ species for reduction of nitro groups and weakening the interaction between halogen groups and Pt atoms for activation of C-halogen bonds.

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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: 7661-33-8, is researched, Molecular C10H10ClNO, about Scope and selectivity in palladium-catalyzed directed C-H bond halogenation reactions, the main research direction is haloarom compound regioselective preparation; aromatic compound halogenation palladium.Application of 7661-33-8.

Palladium-catalyzed ligand directed C-H activation/halogenation reactions have been extensively explored. Both the nature of the directing group and the substitution pattern on the arene ring of the substrate lead to different reactivity profiles, and often different and complementary products, in the presence and absence of the catalyst.

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SDS of cas: 7661-33-8. 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: 1-(4-Chlorophenyl)pyrrolidin-2-one, is researched, Molecular C10H10ClNO, CAS is 7661-33-8, about Iridium(III)-catalyzed regioselective direct arylation of sp2 C-H bonds with diaryliodonium salts. Author is Gao, Pan; Liu, Li; Shi, Zhuangzhi; Yuan, Yu.

A regioselective direct arylation of arenes and olefins with aryliodonium salts at the ortho position to provide biaryl compounds, e.g., I was reported. The key to the high selectivity was the appropriate choice of aryliodonium salts as the arylating reagent in presence of a cationic iridium(III) catalyst. The coordination of the metal with an oxygen atom or a nitrogen atom and subsequent C-H activation allowed for direct arylation with coupling partners. This reaction proceeded under mild reaction conditions and with a high tolerance of various functional groups including many halide functional groups.

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HPLC of Formula: 16588-26-4. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 3-Bromo-4-chloronitrobenzene, is researched, Molecular C6H3BrClNO2, CAS is 16588-26-4, about Optimization of Potent ATAD2 and CECR2 Bromodomain Inhibitors with an Atypical Binding Mode. Author is Lucas, Simon C. C.; Atkinson, Stephen J.; Bamborough, Paul; Barnett, Heather; Chung, Chun-wa; Gordon, Laurie; Mitchell, Darren J.; Phillipou, Alexander; Prinjha, Rab K.; Sheppard, Robert J.; Tomkinson, Nicholas C. O.; Watson, Robert J.; Demont, Emmanuel H..

Most bromodomain inhibitors mimic the interactions of the natural acetylated lysine (KAc) histone substrate through key interactions with conserved asparagine and tyrosine residues within the binding pocket. Herein we report the optimization of a series of Ph sulfonamides that exhibit a novel mode of binding to non-bromodomain and extra terminal domain (non-BET) bromodomains through displacement of a normally conserved network of four water mols. Starting from an initial hit mol., we report its divergent optimization toward the ATPase family AAA domain containing 2 (ATAD2) and cat eye syndrome chromosome region, candidate 2 (CECR2) domains. This work concludes with the identification of (R)-55 (GSK232)(I), a highly selective, cellularly penetrant CECR2 inhibitor with excellent physicochem. properties.

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