Month: April 2022

Electric Literature of C8H12Cl2Pt. 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 Synthesis and Characterization of a Linear, Two-Coordinate Pt(II) Ketimide Complex. Author is Cook, Andrew W.; Hrobarik, Peter; Damon, Peter L.; Najera, Daniel; Horvath, Branislav; Wu, Guang; Hayton, Trevor W..

Herein the authors report the synthesis and characterization of a linear, two-coordinate Pt(II) ketimide complex, Pt(N:CtBu2)2 (1), formed via the reaction of PtCl2(1,5-COD) with 2 equiv of Li(N:CtBu2). Also generated in the reaction is the bimetallic complex [(tBu2C:N)Pt(μ-N,C-N:C(tBu)C(Me)2CH2)Pt(N:CtBu2)] (2). Both complexes 1 and 2 were characterized by NMR spectroscopy and x-ray crystallog. Notably, complex 1 exhibits short Pt-N distances (average Pt-N = 1.817 Å) and an unusually deshielded 195Pt chem. shift (δPt = -629 ppm) with a large 1J(195Pt,14N) coupling constant (537 Hz). These data, in combination with a detailed d. functional theory electronic structure anal., reveal highly covalent Pt:N multiple bonds formed by a combination of σ-donation, π-donation, and π-backdonation. Pt(N:CtBu2)2 represents the 1st linear Pt(II) complex to be reported, expanding the scope of Pt(II) coordination chem. beyond the more common square planar and T-shaped geometries.

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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: 16588-26-4, is researched, Molecular C6H3BrClNO2, about Efficient and recyclable bimetallic Co-Cu catalysts for selective hydrogenation of halogenated nitroarenes, the main research direction is nitroarene selective hydrogenation cobalt copper recyclable catalyst.Synthetic Route of C6H3BrClNO2.

Silica supported N-doped carbon layers encapsulating Co-Cu nanoparticles (Co1Cux@CN/SiO2) were prepared by a one-step impregnation of Co(NO3)2·6H2O, Cu(NO3)2·3H2O, urea and glucose, following in situ carbothermal reduction Effects of Cu contents on the catalytic performance of the Co1Cux@CN/SiO2 catalysts were investigated for selective hydrogenation of p-chloronitrobenzene to p-chloroaniline. The Co1Cu0.30@CN/SiO2 with Cu/Co molar ratio of 0.30:1 presented much higher activity and stability than the monometallic Co@CN/SiO2 catalyst. The addition of Cu into Co1Cux@CN/SiO2 catalysts had favorable effects on the formation of highly active Co-N sites and N-doped carbon layer. The role of the N-doped carbon layer was to protect the Co from oxidation by air, and the Co1Cu0.30@CN/SiO2 could be reused for at least 12 cycles without decrease in catalytic efficiency. Mechanistic and in situ IR studies revealed that the interaction effect between the Co and Cu atoms made the surface of Co highly electron rich, which decreased adsorption of halogen groups and resulting in the enhanced selectivity during chemoselective hydrogenation of halogenated nitroarenes for a wide scope of substrates.

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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, Research Support, Non-U.S. Gov’t, Journal of Developmental Physiology called Decrease in intestinal permeability to polyethylene glycol 1000 during development in the pig, Author is Westroem, B. R.; Tagesson, C.; Leandersson, P.; Folkesson, H. G.; Svendsen, J., which mentions a compound: 7661-33-8, SMILESS is O=C1N(C2=CC=C(Cl)C=C2)CCC1, Molecular C10H10ClNO, Reference of 1-(4-Chlorophenyl)pyrrolidin-2-one.

Changes in intestinal permeability during postnatal development in the pig were investigated by using different-sized polyethylene glycols (PEGs) in the Mr 766-1338 range (PEG 1000) as permeability probes. Pigs of varying age, newborn (0 h), 36-45 h old, and 22-28 days old, were gavage-fed PEG 1000 together with the macromol. markers bovine serum albumin, ovalbumin, or FITC-labeled dextran 70,000. The 4-h blood serum concentrations of the different markers were determined and taken as an estimate of their intestinal transmission. In the newborn pigs, high serum levels of PEGs were obtained, concomitant with high serum levels of bovine serum albumin and FITC-dextran. After intestinal macromol. closure in the 36-45 h-old pigs, lower serum PEG levels were found, especially of those with a Mr > 1100 Da. In the 22-28 day-old pigs, PEG levels were reduced to ≤10% of those in the 36-45-h-old pigs, with the levels decreasing markedly with increasing mol. size. These results show that there is a correlation between the intestinal permeability of PEGs, especially those >1100 Da, and macromols. in the newborn pig around intestinal closure, suggesting that such PEGs traverse the gut by the macromol. route. During later development, further intestinal maturation results in a markedly reduced permeability to PEG 1000.

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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 Confining the Inner Space of Strained Carbon Nanorings. Author is Grabicki, Niklas; Dumele, Oliver.

Strained aromatic macrocycles based on cycloparaphenylenes (CPPs) are the shortest repeating units of armchair single-walled carbon nanotubes. Since the development of several new synthetic methodologies for accessing these structures, their properties have been extensively studied. Besides the fundamental interest in these novel mol. scaffolds, their application in the field of materials science is an ongoing topic of research. Most of the reported CPP-type macrocycles display strong binding toward fullerenes, due to the perfect match between the convex and concave π-surfaces of fullerenes and CPPs, resp. Highly functionalized CPP derivatives capable of supramol. binding with other mols. are rarely reported. The synthesis of highly functionalized [ n]cyclo-2,7-pyrenylenes leads to CPP-type macrocycles with a defined cavity capable of binding non-fullerene guests with high association constants

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COA of Formula: C12H13BrN2O2. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: tert-Butyl 5-bromo-1H-indazole-1-carboxylate, is researched, Molecular C12H13BrN2O2, CAS is 651780-02-8, about Indazoles: Regioselective Protection and Subsequent Amine Coupling Reactions. Author is Slade, David J.; Pelz, Nicholas F.; Bodnar, Wanda; Lampe, John W.; Watson, Paul S..

Indazoles are unselectively protected under strongly basic conditions to give a mixture at positions N-1 and N-2. Under mildly acidic conditions, regioselective protection at N-2 takes place. Thermodn. conditions lead to regioselective protection at N-1. This trend applies to various substituted indazoles. Protected 5-bromoindazoles participate in Buchwald reactions with a range of amines to generate novel derivatives

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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.Cabeza, Javier A.; Garcia-Alvarez, Pablo; Laglera-Gandara, Carlos J.; Perez-Carreno, Enrique researched the compound: Dichloro(1,5-cyclooctadiene)platinum(II)( cas:12080-32-9 ).Application In Synthesis of Dichloro(1,5-cyclooctadiene)platinum(II).They published the article 《Phosphane-functionalized heavier tetrylenes: synthesis of silylene- and germylene-decorated phosphanes and their reactions with Group 10 metal complexes》 about this compound( cas:12080-32-9 ) in Dalton Transactions. Keywords: Group 10 silylene germylene decorated phosphane complex preparation; crystal structure silylene phosphane palladium nickel germylene complex. We’ll tell you more about this compound (cas:12080-32-9).

The stable phosphine-functionalized heavier tetrylenes E(tBu2bzam)pyrmPtBu2 (E = Si (1Si), Ge (1Ge); tBu2bzam = N,N’-di-tertbutylbenzamidinate; HpyrmPtBu2 = di-tert-butyl(2-pyrrolylmethyl)phosphine) were prepared by reacting the amidinatotetrylenes E(tBu2bzam)Cl (E = Si, Ge) with LipyrmPtBu2. The reactions of 1Si and 1Ge with selected M0 and MII (M = Ni, Pd, Pt) metal precursors gave square-planar [MCl2{κ2E,P-E(tBu2bzam)pyrmPtBu2}] (M = Ni, Pd, Pt; E = Si, Ge), tetrahedral [Ni{κ2E,P-E(tBu2bzam)pyrmPtBu2}(cod)] (E = Si, Ge; cod = 1,5-cyclooctadiene) and triangular [M{κ2E,P-E(tBu2bzam)pyrmPtBu2}(PPh3)] (M = Pd, Pt; E = Si, Ge) complexes, showing that 1Si and 1Ge are excellent Si,P- and Ge,P-chelating ligands that, due to their large steric bulk, are able to stabilize three-coordinate Pd0 and Pt0 complexes.

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Application of 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 Two-Phase Oxidations with Aqueous Hydrogen Peroxide Catalyzed by Amphiphilic Pyridinium and Diazinium Salts.

Amphiphilic pyridinium and diazinium salts were shown to be effective catalysts in two-phase (water/chloroform or water/dichloromethane) sulfoxidations and N-oxidations with hydrogen peroxide under mild conditions. This unprecedented oxidation method utilizes covalent bonding of hydrogen peroxide to a simple pyridinium or diazinium nucleus to increase the lipophilicity of the hydroperoxide species and to subsequently activate it for oxidations in a non-polar medium. The catalytic efficiency was found to depend on the type of heteroarenium core and on the lipophilicity of the catalyst. Five series of heteroarenium catalysts were prepared and investigated: 1-Alkyl-3,5-dicyanopyridinium, 1-alkyl-3,5-dinitropyridinium, 1-alkyl-3-cyanopyrazinium, 1-alkyl-4-cyanopyrimidinium and 1-alkyl-4-(trifluoromethyl)pyrimidinium triflates (alkyl=butyl, hexyl, octyl, decyl, dodecyl and hexadecyl). Among them, the 1-octyl-3,5-dinitropyridinium and 1-decyl-4-(trifluoromethyl)pyrimidinium triflates were found to be superior catalysts, showing the best stability and the highest catalytic activity, achieving acceleration by a factor of 350 relative to the non-catalyzed reaction. In contrast to other organocatalytic two-phase oxidations that use hydrogen peroxide, the presented method is characterized by high chemoselectivity and low catalyst loading (5 mol%) and with the reactions being performed under mild conditions, i.e., at 25° using diluted hydrogen peroxide and a non-basic aqueous phase. The catalysts have simple structures and are readily available from com. materials. Practical applications are demonstrated via the oxidation of several types of sulfides and amines.

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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: 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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