Day: April 2, 2022

Related Products of 149554-29-0. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 6-(Piperazin-1-yl)nicotinonitrile, is researched, Molecular C10H12N4, CAS is 149554-29-0, about 1-Amino-4-benzylphthalazines as Orally Bioavailable Smoothened Antagonists with Antitumor Activity. Author is Miller-Moslin, Karen; Peukert, Stefan; Jain, Rishi K.; McEwan, Michael A.; Karki, Rajesh; Llamas, Luis; Yusuff, Naeem; He, Feng; Li, Yanhong; Sun, Yingchuan; Dai, Miao; Perez, Lawrence; Michael, Walter; Sheng, Tao; Lei, Huangshu; Zhang, Rui; Williams, Juliet; Bourret, Aaron; Ramamurthy, Arun; Yuan, Jing; Guo, Ribo; Matsumoto, Melissa; Vattay, Anthony; Maniara, Wieslawa; Amaral, Adam; Dorsch, Marion; Kelleher, Joseph F. III.

Abnormal activation of the Hedgehog (Hh) signaling pathway has been linked to several types of human cancers, and the development of small-mol. inhibitors of this pathway represents a promising route toward novel anticancer therapeutics. A cell-based screen performed in our laboratories identified a new class of Hh pathway inhibitors, 1-amino-4-benzylphthalazines, e.g. I, that act via antagonism of the Smoothened receptor. A variety of analogs were synthesized and their structure-activity relationships determined This optimization resulted in the discovery of high affinity Smoothened antagonists, one of which was further profiled in vivo. This compound displayed a good pharmacokinetic profile and also afforded tumor regression in a genetic mouse model of medulloblastoma.

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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: 5,6-Dihydro-2H-pyran-2-one, is researched, Molecular C5H6O2, CAS is 3393-45-1, about Photochemical C-H Activation Enables Nickel-Catalyzed Olefin Dicarbofunctionalization, the main research direction is arene preparation; ether alkene aryl halide photochem CH activation nickel catalyst; thioether alkene aryl halide photochem CH activation nickel catalyst.Recommanded Product: 5,6-Dihydro-2H-pyran-2-one.

Herein, the implementation of efficient, sustainable, diaryl ketone hydrogen-atom transfer (HAT) catalysis to activate native C-H bonds for multicomponent dicarbofunctionalization of alkenes was reported. The ability to forge new carbon-carbon bonds between reagents typically viewed as commodity solvents provided a new, more atom-economic outlook for organic synthesis. Through detailed exptl. and computational investigation, the critical effect of hydrogen bonding on the reactivity of this transformation was uncovered.

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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: Basic copper carbonate( cas:12069-69-1 ) is researched.Related Products of 12069-69-1.Liu, Lei; Zhu, Menghe; Ma, Zhewen; Xu, Xiaodong; Mohesen Seraji, Seyed; Yu, Bin; Sun, Ziqi; Wang, Hao; Song, Pingan published the article 《A reactive copper-organophosphate-MXene heterostructure enabled antibacterial, self-extinguishing and mechanically robust polymer nanocomposites》 about this compound( cas:12069-69-1 ) in Chemical Engineering Journal (Amsterdam, Netherlands). Keywords: epoxy resin copper phosphate nanoparticle MXene nanocomposite antibacterial. Let’s learn more about this compound (cas:12069-69-1).

The ongoing Covid-19 pandemic has raised the need for urgent antibacterial requirements for many com. important polymers, e.g., Epoxy resins (EPs). Meanwhile, intrinsic flammability and poor impact toughness are two big obstacles that greatly impede the practical applications of EPs. Hence, it has been imperative but highly challenging to create advanced EPs combining satisfactory antibacterial, fire-retardant and mech. robust performances so far. Here, we report a reactive multi-functional heterostructure, copper-organophosphate-MXene (CuP-MXene) by rational design. Our results show that with 5.0% of CuP-MXene, in addition to achieving a high antibacterial efficiency above 99.9%, the resultant EP nanocomposite exhibits satisfactory flame retardancy (UL-94 V-0 rating, peak heat release rate decreased by 64.4%) and improved mech. properties (tensile strength, elastic modulus and impact strength increased by 31.7%, 38.9%, and 25.0%, resp.) relative to virgin EP, outperforming its previous counterparts. Such a desirable performance portfolio arises from multiple synergistic effects between CuP and MXene. This work provides a general strategy for the design of multi-functional nanoadditives and advanced functional polymers, and creates more opportunities for industrial applications of EP in the areas of coatings, medical devices and furniture.

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

Product Details of 89972-77-0. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 4-(p-Tolyl)-2,2:6,2-terpyridine, is researched, Molecular C22H17N3, CAS is 89972-77-0, about Zn(II) complex of terpyridine for the highly selective fluorescent recognition of pyrophosphate. Author is Liang, Li Jiao; Zhao, Xi Juan; Huang, Cheng Zhi.

Pyrophosphate ion (PPi) is crucial in varieties of biol. processes and industrial applications, and thus it is very important how to recognize it with high selectivity. In this contribution, one terpyridine (tpy)-based fluorescent mol., 4-(methylphenyl)-2,2′:6′,2”-terpyridine (mptpy), was reported to display a highly selective recognition for PPi in the presence of Zn(II). After exposure toward the Zn(II) ion, the characteristic emission of mptpy at 376 nm red shifted to 406 nm with a strong enhancement upon an excitation at 280 nm, and then blue-shifted to 388 nm with the further addition of PPi. After exposure toward the Zn(II) ion, the characteristic emission of mptpy at 376 nm red shifted to 406 nm with a strong enhancement upon an excitation at 280 nm, and then blue-shifted to 388 nm with the further addition of PPi. This process could also discriminate PPi from other inorganic anions. Therefore, a tpy-based fluorescence method for the highly selective recognition of PPi could be developed.

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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 n-Type Redox-active Benzoylpyridinium-substituted Supramolecular Gel for an Organogel-based Rechargeable Device.Reference of 11-Bromoundecanoic acid.

A supramol. benzoylpyridinium-substituted cyclohexanediamine gelator with n-type redox properties was synthesized. The gelator formed a robust supramol. network consisting of cyclohexanediamine units. In the organogel, the stable redox reactions of the benzoylpyridinium moieties led to a reversible charge/discharge at -1.05 V (vs.Fc/Fc+). A supramol.-based rechargeable device was fabricated using TEMPO- and benzoylpyridinium-substituted gelators as the cathode and anode, resp., giving rise to a flexible, transparent, and even self-healable battery.

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

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: 89972-77-0, is researched, SMILESS is CC1=CC=C(C2=CC(C3=NC=CC=C3)=NC(C4=NC=CC=C4)=C2)C=C1, Molecular C22H17N3Journal, Yingxiang Kexue Yu Guang Huaxue called Investigation on mixed-valence charge transfer state of cobalt(II)-bis[4′-ferrocenyl-2,2′: 6′,2”-terpyridyl] complex, Author is Liu, Xian-yu; Wang, Jiu-ju; Li, Zhi-jun; Zhang, Li-ping; Tong, Zhen-he; Wu, Li-zhu, the main research direction is mixed valence charge transfer cobalt ferrocenyl terpyridyl complex.Name: 4-(p-Tolyl)-2,2:6,2-terpyridine.

Cobalt(II)-bis[4′-ferrocenyl-2,2′: 6′,2”-terpyridyl] complex 1 and reference complexes cobalt(II)-bis[4′-(4-methylphenyl)-2,2′: 6′,2”-terpyridyl] (2) and cobalt(II)-bis[2,2′: 6′,2”-terpyridyl] (3) were designed and synthesized. Complex 1 exhibits obvious low-energy absorption from 500 to 700 nm due to introduction of electro-donating ferrocenyl group, which could be switched to mixed-valence charge transfer state ranged from 500 to 800 nm upon partial oxidation

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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: 4-(p-Tolyl)-2,2:6,2-terpyridine, is researched, Molecular C22H17N3, CAS is 89972-77-0, about Synthesis, crystal structure and electrochemical behavior of two new Ni-based complexes: [Ni2(ttpy)2(SCN)4] and [Ni(ttpy)2](CH3OH)2(2I), the main research direction is nickel tolylterpyridine complex preparation crystal structure cyclic voltammetry.Computed Properties of C22H17N3.

A simple synthetic procedure was used to prepare two new nickel(II) complexes [Ni2(ttpy)2(SCN)4], (1) and [Ni(ttpy)2](CH3OH)2(2I), (2) from 4′-p-tolyl-2,2′:6′,2”-terpyridine (ttpy) ligand, potassium thiocyanate, and potassium iodide in good yields. The single crystal x-ray analyses reveal that the metals in these complexes are sixfold coordinated with M:L ratio of 1:1 and 1:2 for (1) and (2), resp. In both complexes, the Ni(II) has distorted octahedral geometry including N5S and N6 environments. Versatile interactions in supramol. level containing coordinative bonding, I···H, and N···H hydrogen bonding, π-π stacking play considerable roles in forming crystal packing of (1) and (2). From obtained data differences in coordination abilities, of used counterions, cause the formation of complexes with 1:1 or 1:2 ratio of metal and ligand. Electrochem. behaviors of the both complexes were studied.

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

Recommanded Product: 494-52-0. 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: (S)-3-(Piperidin-2-yl)pyridine, is researched, Molecular C10H14N2, CAS is 494-52-0, about An essay on ecosystem availability of Nicotiana glauca graham alkaloids: the honeybees case study. Author is Kasiotis, Konstantinos M.; Evergetis, Epameinondas; Papachristos, Dimitrios; Vangelatou, Olympia; Antonatos, Spyridon; Milonas, Panagiotis; Haroutounian, Serkos A.; Machera, Kyriaki.

The present study is elaborating on this subject with a specific focus on the Nicotiana glauca Graham (Solanaceae) alkaloids and their occurrence and food chain penetrability in Mediterranean ecosystems. The method exhibited satisfactory recoveries, for all analytes, ranging from 75 to 93%, and acceptable repeatability and reproducibility. Four compounds (anabasine, anatabine, nornicotine, and scopoletin) were identified and quantified in 3 N. glauca flowers extracts, establishing them as potential sources of alien bio-mols. The most abundant constituent was anabasine, determined at 3900 μg/g in the methanolic extract These extracts were utilized as feeding treatments on Apis mellifera honeybees, resulting in mild toxicity documented by 16-18% mortality. A slightly increased effect was elicited by the methanolic extract containing anabasine at 20 μg/mL, where mortality approached 25%. Dead bees were screened for residues of the N. glauca flower extracts compounds and a significant mean concentration of anabasine was evidenced in both 10 and 20 μg/mL treatments, ranging from 51 to 92 ng/g per bee body weight Scopoletin was also detected in trace amounts Conclusions: The mild toxicity of the extracts in conjunction with the alkaloid and coumarin residual detection in bees, suggest that these alien bio-mols. are transferred within the food chain, suggesting a chem. invasion phenomenon, never reported before.

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

Bertrand, Helene; Monchaud, David; De Cian, Anne; Guillot, Regis; Mergny, Jean-Louis; Teulade-Fichou, Marie-Paule published the article 《The importance of metal geometry in the recognition of G-quadruplex-DNA by metal-terpyridine complexes》. Keywords: terpyridine derivative ligand preparation transition metal complex; DNA binding terpyridine derivative ligand transition metal complex.They researched the compound: 4-(p-Tolyl)-2,2:6,2-terpyridine( cas:89972-77-0 ).Recommanded Product: 4-(p-Tolyl)-2,2:6,2-terpyridine. 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:89972-77-0) here.

A family of terpyridine metallo-organic complexes (of Cu, Pt, Ru and Zn) was designed and its recognition properties of G-quadruplex-DNA studied. The series combines easy synthetic access and good affinity-selectivity ratio for quadruplex-DNA. The authors’ study also highlights that the geometry of the metal center strongly governs the ability of the compounds to discriminate quadruplex from duplex-DNA.

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

Reference of (S)-5-(Hydroxymethyl)dihydrofuran-2(3H)-one. 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: (S)-5-(Hydroxymethyl)dihydrofuran-2(3H)-one, is researched, Molecular C5H8O3, CAS is 32780-06-6, about Identification and expression of a CHMO from the Pseudomonas aeruginosa strain Pa1242: application to the bioconversion of Cyrene into a key precursor (S)-γ-hydroxymethyl-butyrolactone. Author is Mouterde, Louis M. M.; Couvreur, Julien; Langlait, Maxime M. J.; Brunois, Fanny; Allais, Florent.

A sequence from the complete genome of the Pseudomonas aeruginosa strain Pa1242 was identified to code for a potentially new cyclohexanone monooxygenase (CHMO). The latter was discovered using the Basic Alignment Search Tool (BLAST) with the DNA sequence of the CHMO from Acinetobacter sp. NCIB 9871 as the parent sequence considering that this enzyme family maintains a relatively high query cover (>95%) and identity percentage (>50%) among many different microorganisms. This was confirmed by the bioconversion of the cellulose-based green solvent Cyrene into a key precursor (S)-γ-hydroxymethyl-butyrolactone (2H-HBO) using a new strain of E. coli BL21(DE3) containing a plasmid designed for the overexpression of the unprecedented CHMO (pLM7). Besides confirming the CHMO activity of this novel sequence, this bioconversion allows the obtention of 2H-HBO while maintaining the naturalness of the process. The optimal culture conditions were assessed through a Design of Experiments (DoE), and the control of the pH and O2 level allowed to reach a working concentration of 20 g L-1 of Cyrene with total conversion and a productivity rate of 401 ± 36 mg L-1 h-1.

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