Category: catalyst-ligand

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: (S)-5-(Hydroxymethyl)dihydrofuran-2(3H)-one, is researched, Molecular C5H8O3, CAS is 32780-06-6, about Circular dichroic studies on marmelo lactones and the related γ-lactones with unsaturation at the C-5 position.Safety of (S)-5-(Hydroxymethyl)dihydrofuran-2(3H)-one.

The intense CD bands of marmelo lactones and the related γ-lactones with unsaturation at the C-5 position were studied in terms of the possible interactions between the n → π* transition of the carbonyl and the π → π* transition of the double bond at C-5, together with the preferred conformations about the C4-C5 axis. The C4-C5 axis of marmelo lactones takes a preferred conformation which is characteristic for the acyclic allylic alcs. and seems to be an important factor for the (4S)-γ-lactones with a double bond at the C-5 position to give a neg. coupling between the 2-chromophores.

This compound((S)-5-(Hydroxymethyl)dihydrofuran-2(3H)-one)Safety of (S)-5-(Hydroxymethyl)dihydrofuran-2(3H)-one was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: (S)-5-(Hydroxymethyl)dihydrofuran-2(3H)-one, is researched, Molecular C5H8O3, CAS is 32780-06-6, about Comparative study of the anti-human cytomegalovirus activities and toxicities of a tetrahydrofuran phosphonate analog of guanosine and cidofovir, the main research direction is cytomegalovirus antiviral THF phosphonate guanosine cidofovir; nephrotoxicity antiviral THF phosphonate guanosine analog.Formula: C5H8O3.

Cidofovir is the first nucleoside monophosphate analog currently being used for the treatment of human cytomegalovirus (HCMV) retinitis in individuals with AIDS. Unfortunately, the period of therapy with the use of this compound may be limited due to the possible emergence of serious irreversible nephrotoxic effects. New drugs with improved toxicity profiles are needed. The goal of this study was to investigate the anticytomegaloviral properties and drug-induced toxicity of a novel phosphonate analog, namely, (-)-2-(R)-dihydroxyphosphinoyl-5-(S)-(guanin-9′-yl-methyl) THF (compound 1), in comparison with those of cidofovir. The inhibitory activities of both compounds on HCMV propagation in vitro were similar against the AD 169 and Towne strains, with 50% inhibitory concentrations ranging from 0.02 to 0.17 μg/mL for cidofovir and <0.05 to 0.09 μg/mL for compound 1. A clin. HCMV isolate that was resistant to ganciclovir and that had a known mutation within the UL54 DNA polymerase gene and a cidofovir-resistant laboratory strain derived from strain AD 169 remained sensitive to compound 1, whereas their susceptibilities to ganciclovir and cidofovir were reduced by 33- and 10-fold, resp. Both compound 1 and cidofovir exhibited equal potencies in an exptl. induced murine cytomegalovirus (MCMV) infection in mice, with a prevention or prolongation of mean day to death at dosages of 1.0, 3.2, and 10.0 mg/kg of body weight/day. In cytotoxicity experiments, compound 1 was found to be generally more toxic than cidofovir in cell lines Hs68, HFF, and 3T3-L1 (which are permissive for HCMV or MCMV replication) but less toxic than cidofovir in MRC-5 cells (which are permissive for HCMV replication). Drug-induced toxic side effects were noticed for both compounds in rats and guinea pigs in a 5-day repeated-dose study. In guinea pigs, a greater weight loss was noticed with cidofovir than with compound 1 at dosages of 3.0 and 10.0 mg/kg/day. An opposite effect was detected in rats, which were treated with the compounds at relatively high dosages (up to 100 mg/kg/day). Compound 1 and cidofovir were nephrotoxic in both rats and guinea pigs, with the epithelium lining the proximal convoluted tubules in the renal cortex being the primary target site. The incidence and the severity of the lesions were found to be dose dependent. The lesions observed were characterized by cytoplasm degeneration and nuclear modifications such as karyomegaly, the presence of pseudoinclusions, apoptosis, and degenerative changes. In the guinea pig model, a greater incidence and severity of lesions were observed for cidofovir than for compound 1 (P < 0.001) with a drug regimen of 10 mg/kg/day. This compound((S)-5-(Hydroxymethyl)dihydrofuran-2(3H)-one)Formula: C5H8O3 was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Application of 89972-77-0. 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: 4-(p-Tolyl)-2,2:6,2-terpyridine, is researched, Molecular C22H17N3, CAS is 89972-77-0, about A new polymorph of 4′-tolyl-2,2′:6′,2”-terpyridine (ttpy) and the single crystal structures of [Fe(ttpy)2][PF6]2 and [Ru(ttpy)2][PF6]2.

Single crystals of a new polymorph of 4′-tolyl-2,2′:6′,2”-terpyridine (ttpy) were grown by evaporation of a hexane-Et acetate solution of the ligand; the packing features weak π-stacking and Npyridine···HC interactions between stacks of ttpy mols. Improved syntheses of [M(ttpy)2][PF6]2 (M = Fe, Ru), and the single crystal structures of [Fe(ttpy)2][PF6]2·2.2MeCN and [Ru(ttpy)2][PF6]2·1.75MeCN·0.2H2O are reported.

This compound(4-(p-Tolyl)-2,2:6,2-terpyridine)Application of 89972-77-0 was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 4-(p-Tolyl)-2,2:6,2-terpyridine( cas:89972-77-0 ) is researched.Electric Literature of C22H17N3.Uma, Varadarajan; Elango, Munusamy; Nair, Balachandran Unni published the article 《Copper(II) terpyridine complexes: effect of substituent on DNA binding and nuclease activity》 about this compound( cas:89972-77-0 ) in European Journal of Inorganic Chemistry. Keywords: copper terpyridine preparation redox potential ESR spectra; DNA binding nuclease activity copper terpyridine; optimized mol structure DFT calculation toluene imidazole; electrophilicity electron density DFT calculation toluene imidazole. Let’s learn more about this compound (cas:89972-77-0).

Mononuclear copper(II) terpyridine complexes, [Cu(ttpy)Cl]Cl (1) and [Cu(itpy)Cl]Cl (2) (ttpy = tolylterpyridine and itpy = imidazolylterpyridine) were synthesized and characterized. The interaction of the complexes with DNA was studied by electronic and CD spectroscopy, viscosity and gel electrophoresis. Absorption titrations, viscosity and CD experiments reveal an intercalative mode of DNA binding for these complexes. The binding constant values for 1 and 2 are (5.6 ± 0.2) x 104 and (1.4 ± 0.2) x 104 M-1, resp., and suggest moderate binding of these complexes to DNA. From computational studies, the aromatic π cloud is more uniformly distributed in the case of tolylterpyridine (complex 1), which possibly leads to better stacking interactions with the DNA bases and hence a higher binding constant value for complex 1. From the gel electrophoresis experiments, it is inferred that both complex 1 and 2 cleave plasmid DNA in the presence of ascorbic acid and the cleavage efficiency of complex 1 is greater than that of complex 2.

This compound(4-(p-Tolyl)-2,2:6,2-terpyridine)Electric Literature of C22H17N3 was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Computed Properties of C11H21BrO2. 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: 11-Bromoundecanoic acid, is researched, Molecular C11H21BrO2, CAS is 2834-05-1, about Evaluation of diuretic activity of crude extracts of leaves of filicium decipiens and analysis of biomolecules present in fraction of methanolic extract using GC-MS technique. Author is Basarikatti, A. I.; Uppar, V.; Padmashali, B..

Filicium decipiens belongs to the Sapindaceae family, which is commonly known as fern tree, is found in the Western Ghats of southern India, small highland areas of East Africa and Sri Lanka and it is a medium to a large evergreen tree. It is commonly cultivated in gardens and roadsides as ornamental, noise barriers and windbreak plant. Filicium decipiens traditionally used for the treatment of diabetes in India. The leaves of Filicium decipiens have been collected from the Western Ghats of southern India, shade dried and powd. well. The finely powd. leaves have been extracted with petroleum ether, chloroform, methanol and water successively with an increase in polarity. The methanolic extract was column chromate-graphed using silica gel G 100-200 mesh to get brown color crystalline solid, which was analyzed for the presence of bioactive chem. constituents using Gas chromatog.-mass spectrometry (GC-MS) technique. GC-MS anal. revealed the presence of thirty chem. constituents. The four different crude extracts (petroleum ether, chloroform, methanol and water) of leaves of Filicium decipiens have been tested with a diuretic activity using the Lipschitz method. The methanolic extract exhibits diuretic activity.

This compound(11-Bromoundecanoic acid)Computed Properties of C11H21BrO2 was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

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: 11-Bromoundecanoic acid, is researched, Molecular C11H21BrO2, CAS is 2834-05-1, about Adsorption of phenylalanine-rich sequence-defined oligomers onto Kevlar fibers for fiber-reinforced polyolefin composite materials.Reference of 11-Bromoundecanoic acid.

Oligomers comprising four or sixteen phenylalanine residues with regularly intercalated aliphatic chains of different lengths prepared by solid-phase synthesis exhibit sufficient thermal stability to be used as interfacial agents and processed for the preparation of poly(propylene-co-ethylene)-based composite materials. The investigation of their adsorption on Kevlar fibers by SEM is difficult due to the surface heterogeneity of the bare Kevlar fibers. However, oligomers with four successive phenylalanine residues have been clearly observed suggesting their better adsorption on the fiber. The quantification of those oligomers adsorbed on the fibers performed gravimetrically on pellets of fibers has however revealed no significant impact of the length of the aliphatic chain.

Different reactions of this compound(11-Bromoundecanoic acid)Reference of 11-Bromoundecanoic acid require different conditions, so the reaction conditions are very important.

Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

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, European Journal of Inorganic Chemistry called High-Performance Catalysts Derived from Cupric Subcarbonate for Selective Hydrogenation of Acetylene in an Ethylene Stream, Author is Lu, Chenyang; Zeng, Aonan; Wang, Yao; Wang, Anjie, which mentions a compound: 12069-69-1, SMILESS is O[Cu]OC(O[Cu]O)=O, Molecular CH2Cu2O5, Application In Synthesis of Basic copper carbonate.

A high-performance base metal catalyst for acetylene selective hydrogenation was prepared from cupric subcarbonate (Cu2(OH)2CO3) by thermal treatment with an acetylene-containing gas followed by hydrogen reduction The characterization results revealed that the copper catalyst was composed of interstitial copper carbide (CuxC) and metal Cu, which were embedded in porous carbon matrix. The CuxC crystallites, which showed outstanding hydrogenation activity, were derived from the hydrogen reduction of copper (II) acetylide (CuC2) which was generated from the reaction between acetylene and Cu2(OH)2CO3. The Cu particles and porous carbon were generated from the unavoidable thermal decomposition of CuC2. The prepared Cu-derived catalyst completely removed the acetylene impurity in an ethylene stream with a very low over-hydrogenation selectivity at 110°C and atm. pressure. No obvious deactivation was observed in a 180-h test run. In the Cu-derived catalyst, CuxC served as the catalytic site for H2 dissociation, Cu mainly functioned as the site for selective hydrogenation of acetylene, whereas the porous carbon matrix posed a steric hindrance effect on the chain growth of linear hydrocarbons so as to suppress the undesired oligomerization.

Different reactions of this compound(Basic copper carbonate)Application In Synthesis of Basic copper carbonate require different conditions, so the reaction conditions are very important.

Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 11-Bromoundecanoic acid(SMILESS: O=C(O)CCCCCCCCCCBr,cas:2834-05-1) is researched.Application In Synthesis of Basic copper carbonate. The article 《Shaping Liquid Crystals with Gold Nanoparticles: Helical Assemblies with Tunable and Hierarchical Structures Via Thin-Film Cooperative Interactions》 in relation to this compound, is published in Advanced Materials (Weinheim, Germany). Let’s take a look at the latest research on this compound (cas:2834-05-1).

The availability of helical assemblies of plasmonic nanoparticles with precisely controlled and tunable structures can play a key role in the future development of chiral plasmonics and metamaterials. Here, a strategy to efficiently yield helical structures based on the cooperative interactions of liquid crystals and gold nanoparticles in thin films is developed. These nanocomposites exhibit exceptional long-range hierarchical order across length scales, which results from the growth mechanism of nanoparticle-coated twisted nanoribbons and their ability to form organized bundles. The helical assembly formation is governed by the presence of rationally functionalized nanoparticles. Importantly, the thickness of the achieved nanocomposites can be reversibly reconfigured owing to the polymorphic nature of the liquid crystal. The versatility of the proposed approach is demonstrated by preparing helixes assembled from nanoparticles of different geometries and dimensions (spherical and rod-like). The described strategy may become an enabling technol. for structuring nanoparticle assemblies with high precision and fabricating optically active materials.

Different reactions of this compound(11-Bromoundecanoic acid)SDS of cas: 2834-05-1 require different conditions, so the reaction conditions are very important.

Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

HPLC of Formula: 149554-29-0. 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: 6-(Piperazin-1-yl)nicotinonitrile, is researched, Molecular C10H12N4, CAS is 149554-29-0, about A therapeutic approach to pantothenate kinase associated neurodegeneration. Author is Sharma, Lalit Kumar; Subramanian, Chitra; Yun, Mi-Kyung; Frank, Matthew W.; White, Stephen W.; Rock, Charles O.; Lee, Richard E.; Jackowski, Suzanne.

Pantothenate kinase (PANK) is a metabolic enzyme that regulates cellular CoA (CoA) levels. There are three human PANK genes, and inactivating mutations in PANK2 lead to pantothenate kinase associated neurodegeneration (PKAN). Here we performed a library screen followed by chem. optimization to produce PZ-2891, an allosteric PANK activator that crosses the blood brain barrier. PZ-2891 occupies the pantothenate pocket and engages the dimer interface to form a PANK.ATP.Mg2+.PZ-2891 complex. The binding of PZ-2891 to one protomer locks the opposite protomer in a catalytically active conformation that is refractory to acetyl-CoA inhibition. Oral administration of PZ-2891 increases CoA levels in mouse liver and brain. A knockout mouse model of brain CoA deficiency exhibited weight loss, severe locomotor impairment and early death. Knockout mice on PZ-2891 therapy gain weight, and have improved locomotor activity and life span establishing pantazines as novel therapeutics for the treatment of PKAN.

Different reactions of this compound(6-(Piperazin-1-yl)nicotinonitrile)HPLC of Formula: 149554-29-0 require different conditions, so the reaction conditions are very important.

Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Supramolecular nano-encapsulation of anabasine reduced its developmental toxicity in zebrafish, published in 2020, which mentions a compound: 494-52-0, Name is (S)-3-(Piperidin-2-yl)pyridine, Molecular C10H14N2, Application In Synthesis of (S)-3-(Piperidin-2-yl)pyridine.

Anabasine (ANA), a major piperidine alkaloid originally isolated from wild tobacco trees (Nicotiana glauca), has been known to induce serious developmental toxicities such as skeletal deformities in livestock and humans. In this study, we thoroughly investigated the supramol. nano-encapsulations of ANA by an artificial nanocontainer, cucurbit[7] uril (CB[7]), and examined the influences of the nano-encapsulation on ANA’s inherent developmental toxicities on a zebrafish model. We have shown that CB[7] formed 1:1 host-guest inclusion complexes with ANA via a relatively high binding strength [Ka of (7.45 ± 0.31) x 104 M-1] in an aqueous solution, via UV-vis and 1 H NMR spectroscopic titrations, as well as isothermal titration calorimetry titration As a consequence, CB[7] significantly attenuated the developmental toxicity of ANA on zebrafish in vivo. In contrast, for a comparative purpose, β-CD didn’t exert any influence on the toxicity of ANA due to its weak binding with ANA, which was not even measurable via either spectroscopic methods or ITC titration This is the first head-to-head comparison of this pair of nanocontainers, CB[7] and β-CD, on their potential roles in influencing the toxicity of guest mols. and the results suggested that CB[7] could become a more promising functional excipient for reducing the inherent toxicities of active pharmaceutical ingredients, particularly alkaloids that may form relatively strong host-guest binding species with the host.

《Supramolecular nano-encapsulation of anabasine reduced its developmental toxicity in zebrafish》 provides a strategy for the preparation of materials with excellent comprehensive properties, which is conducive to broaden the application field of this compound((S)-3-(Piperidin-2-yl)pyridine)Application In Synthesis of (S)-3-(Piperidin-2-yl)pyridine.

Reference:
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI