Month: October 2022

Khatouri, M.; Ahfir, R.; Lemaalam, M.; El Khaoui, S.; Derouiche, A.; Filali, M. published the artcile< Effect of hydrophobically modified PEO polymers (PEO-dodecyl) on oil/water microemulsion properties: in vitro and in silico investigations>, Recommanded Product: 1-Hexadecylpyridin-1-ium chloride, the main research area is hydrophobically modified PEO polymer oil water microemulsion property.

Microemulsions are excellent systems for transdermal delivery of multifunctional drugs because they have the potential to improve drug absorption/permeation and handling limitations. Biocompatible polymers are used as a coating of microemulsions to avoid the interactions that can occur between the microemulsions and the skin. Thus, they protect and lubricate these transporter nanovesicles. In this paper, we studied decane/water microemulsions covered with hydrophobically modified PEO polymer (PEO-m). To reveal the effect of hydrophobically modified PEO (PEO-m) polymer on the shape, the micro-arrangement and the dynamics of the microemulsions, we used an integrated strategy combining Mol. Dynamics simulation (MD), Small-Angle Neutron Scattering experiments (SANS), and the Ornstein-Zernike integral equations with the Hypernetted Chain (HNC) closure relation. We determined the microemulsion shape in vitro using the renormalized intensities spectra from SANS experiments We discussed the micro arrangements of microemulsions, in vitro and in silico, employing the pair correlation function g(r) and the structure factor S(q), obtained from the three approaches with good agreement. Thus, we used the validated MD simulations to calculate the microemulsion’s dynamics properties that we discussed using the mean-squared displacement (MSD) and the diffusion coefficients We found that the presence of moderate quantities of PEO-m, from 4 to 12 PEO-m per microemulsion, does not influence the microemulsion shape, increases the stability of the microemulsion, and slightly decrease the dynamics. Our in vitro and in silico results suggest that polymer incorporation, which has interesting in vivo implications, has no disadvantageous effects on the microemulsion properties.

RSC Advances published new progress about Absorption. 123-03-5 belongs to class pyridine-derivatives, and the molecular formula is C21H38ClN, Recommanded Product: 1-Hexadecylpyridin-1-ium chloride.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Aversa-Fleener, Cara R.; Chang, Daniel K.; Liberman-Martin, Allegra L. published the artcile< Carbodiphosphorane-Catalyzed Hydroboration of Ketones and Imines>, Quality Control of 350-03-8, the main research area is carbodiphosphorane catalyzed hydroboration ketone imine aldehyde; pinacol boronate ester preparation.

The authors report the use of a cyclic carbodiphosphorane catalyst for ketone and imine hydroboration reactions. Ketone hydroboration reactions are particularly rapid, typically reaching completion within 15 min using a 1 mol % catalyst loading at 25°. To the authors’ knowledge, this represents the 1st use of a carbodiphosphorane as an organocatalyst. The carbodiphosphorane exhibited superior catalytic activity in comparison to other neutral C nucleophiles tested, including an N-heterocyclic carbene, an N-heterocyclic olefin, and P ylides.

Organometallics published new progress about Aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 350-03-8 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO, Quality Control of 350-03-8.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Nakajima, Yutaka; Tojo, Takashi; Morita, Masataka; Hatanaka, Keiko; Shirakami, Shohei; Tanaka, Akira; Sasaki, Hiroshi; Nakai, Kazuo; Mukoyoshi, Koichiro; Hamaguchi, Hisao; Takahashi, Fumie; Moritomo, Ayako; Higashi, Yasuyuki; Inoue, Takayuki published the artcile< Synthesis and evaluation of 1H-pyrrolo[2,3-b]pyridine derivatives as novel immunomodulators targeting Janus kinase 3>, COA of Formula: C8H5ClN2O2, the main research area is pyrrolopyridine preparation Janus kinase inhibitor lipophilicity mol docking pharmacokinetics.

A series of 1H-pyrrolo[2,3-b]pyridine derivatives I [R = H, Me, c-Hex, Ph; R1 = NHCH(CH2CH3)2, piperidin-1-yl, ((1S,2R)-2-methylcyclohexyl)aminyl, cyclohexylaminyl, etc.] as novel immunomodulators targeting JAK3 for use in treating immune diseases such as organ transplantation has been described. In the chem. modification of N-cyclohexyl-N-methyl-1H-pyrrolo[2,3-b]pyridin-4-amine, the introduction of a carbamoyl group to the C5-position and substitution of a cyclohexylamino group at the C4-position of the 1H-pyrrolo[2,3-b]pyridine ring led to a large increase in JAK3 inhibitory activity. Compound I [R = H, R1 = ((1S,2R)-2-methylcyclohexyl)aminyl] was identified as a potent, moderately selective JAK3 inhibitor, and the immunomodulating effect of I [R = H, R1 = ((1S,2R)-2-methylcyclohexyl)aminyl] on interleukin-2-stimulated T cell proliferation was shown. Docking calculations and WaterMap anal. of the 1H-pyrrolo[2,3-b]pyridine-5-carboxamide derivatives I were conducted to confirm the substituent effects on JAK3 inhibitory activity.

Chemical & Pharmaceutical Bulletin published new progress about Amines Role: RCT (Reactant), RACT (Reactant or Reagent). 920966-03-6 belongs to class pyridine-derivatives, and the molecular formula is C8H5ClN2O2, COA of Formula: C8H5ClN2O2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Wang, Zhaobin; Yang, Ze-Peng; Fu, Gregory C. published the artcile< Quaternary stereocentres via catalytic enantioconvergent nucleophilic substitution reactions of tertiary alkyl halides>, Category: pyridine-derivatives, the main research area is nickel catalytic enantioconvergent nucleophilic substitution tertiary alkyl electrophiles alkenylzirconium.

The development of efficient methods, particularly catalytic and enantioselective processes, for the construction of all-carbon quaternary stereocentres is an important (and difficult) challenge in organic synthesis due to the occurrence of this motif in a range of bioactive mols. One conceptually straightforward and potentially versatile approach is the catalytic enantioconvergent substitution reaction of a readily available racemic tertiary alkyl electrophile by an organometallic nucleophile; however, examples of such processes are rare. Here we demonstrate that a nickel-based chiral catalyst achieves enantioconvergent couplings of a variety of tertiary electrophiles (cyclic and acyclic α-halocarbonyl compounds) with alkenylmetal nucleophiles to form quaternary stereocentres with good yield and enantioselectivity under mild conditions in the presence of a range of functional groups. These couplings, which probably proceed via a radical pathway, provide access to an array of useful families of organic compounds, including intermediates in the total synthesis of two natural products, (-)-eburnamonine and madindoline A.

Nature Chemistry published new progress about Alkenylation catalysts, stereoselective. 1428537-19-2 belongs to class pyridine-derivatives, and the molecular formula is C13H15F3N2O, Category: pyridine-derivatives.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Padilla-Salinas, Rosaura; Anderson, Rachel; Sakaniwa, Kentaro; Zhang, Shuting; Nordeen, Patrick; Lu, Chuanjun; Shimizu, Toshiyuki; Yin, Hang published the artcile< Discovery of Novel Small Molecule Dual Inhibitors Targeting Toll-Like Receptors 7 and 8>, Reference of 3796-23-4, the main research area is oxadiazole derivative preparation dual inhibitor TLR7 TLR8.

Endosomal toll-like receptors (TLRs) 7 and 8 recognize viral single-stranded RNAs, a class of imidazoquinoline compounds, 8-oxo-adenosines, 8-aminobenzodiazepines, pyrimidines, and guanosine analogs. Substantial evidence is present linking chronic inflammation mediated specifically by TLR7 to the progression of autoimmunity. We identified a new TLR7/8 dual inhibitor (1) and a TLR8-specific inhibitor (2) based on our previous screen targeting TLR8. Compound 1, bearing a benzanilide scaffold, was found to inhibit TLR7 and TLR8 at low micromolar concentrations We envisioned making modifications on the benzanilide scaffold of 1 resulting in a class of highly specific TLR7 inhibitors. Our efforts led to the discovery of a new TLR8 inhibitor (CU-115) and identification of a TLR7/8 dual inhibitor (CU-72), bearing a distinct di-Ph ether skeleton, with potential for TLR7 selectivity optimization. Given the role of TLR8 in autoimmunity, we also optimized the potency of 2 and developed a new TLR8 inhibitor bearing a 1,3,4-oxadiazole motif.

Journal of Medicinal Chemistry published new progress about Anti-inflammatory agents. 3796-23-4 belongs to class pyridine-derivatives, and the molecular formula is C6H4F3N, Reference of 3796-23-4.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Qiu, Xuchun; Tengbe, Michaela Sia; Xia, Xingyi; Dong, Kejun; Chen, Chen; Shi, Yanhong; Li, Ming; Xu, Hai; Wu, Xiangyang; Chen, Kun published the artcile< Impacts of Cetylpyridinium Chloride on the Survival, Development, Behavior, and Oxidative Stress of Early-Life-Stage Zebrafish (Danio rerio)>, COA of Formula: C21H38ClN, the main research area is cetylpyridinium chloride superoxide dismutase aquatic ecosystem oxidative stress; behavioral responses; cetylpyridinium chloride; development; early life stages; oxidative stress; zebrafish.

Cetylpyridinium chloride (CPC) is a widely used surfactant that has been detected in various water ecosystems. However, knowledge on the toxicity of CPC to fish remains scarce. Here, we examined the survival, development, behavior, and oxidative stress in the early life stages of zebrafish exposed to CPC (0, 4, 40, 400, and 1200 μg/L) until 120 h post-fertilization (hpf). Results showed that CPC induced significant mortality at 400 and 1200 μg/L, with a 120 h-EC50 value of 175.9 μg/L. CPC significantly decreased the heart rate of embryos (48 hpf; 4-400 μg/L) and larvae (72 hpf; 40 and 400 μg/L). At 120 hpf, CPC exhibited a dual effect on the locomotion activity (decreased at 400 μg/L and increased at 4 and 40 μg/L) and elevated the reactive oxygen species, superoxide dismutase, and glutathione levels in zebrafish larvae at 400 μg/L. In addition, a correlation anal. revealed that CPC-induced oxidative stress might play a critical role in mediating the cardiac and behavioral toxicity of CPC to zebrafish larvae. Our findings suggest that CPC may disturb the fish′s development, behavior, and oxidative status at environmentally relevant concentrations, which should not be ignored when assessing its potential risks to aquatic ecosystems.

Antioxidants published new progress about Aquatic ecosystem. 123-03-5 belongs to class pyridine-derivatives, and the molecular formula is C21H38ClN, COA of Formula: C21H38ClN.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Wang, Hai; Wang, Liang; Wang, Sai; Dong, Xue; Zhang, Jian; Xiao, Feng-Shou published the artcile< Aerobic Activation of C-H Bond in Amines Over a Nanorod Manganese Oxide Catalyst>, Application of C6H8N2, the main research area is aerobic activation amine nanorod manganese oxide catalyst; amide preparation green chem.

The development of heterogeneous catalysts for the synthesis of pharmaceutically relevant compounds is always important for chem. research. Here, we report a selective aerobic oxidation of aromatic and aliphatic amines to corresponding amides over a nanorod manganese oxide (NR-MnOx) catalyst. The kinetic studies reveal that the NR-MnOx catalyzed amine-to-amide reaction proceeds the oxidative dehydrogenation of the amines into nitriles, followed by hydrolysis of nitrile into amides. The NR-MnOx exhibits fast kinetics and high selectivities in these steps, as well as hinders the byproduct formation. More importantly, the NR-MnOx catalyst is stable and reusable in the continuous recycle tests with water as a sole byproduct, exhibiting superior sustainability and significant advancement to outperform the traditional amide production route in acidic or basic media with toxic byproducts.

ChemCatChem published new progress about Amides Role: SPN (Synthetic Preparation), PREP (Preparation). 3731-53-1 belongs to class pyridine-derivatives, and the molecular formula is C6H8N2, Application of C6H8N2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Voisin, Anne Sophie; Bouillon, Alexandre; Lancelot, Jean-Charles; Rault, Sylvain published the artcile< Efficient synthesis of halohydroxypyridines by hydroxydeboronation>, SDS of cas: 96630-88-5, the main research area is halohydroxypyridine preparation regioselective hydroxydeboronation halopyridinylboronic acid ester.

This paper describes a general method for the synthesis of halohydroxypyridines from novel halopyridinylboronic acids and esters recently described by some of us. Halopyridinylboronic acids and esters have been efficiently hydroxydeboronated under mild conditions by employing hydrogen peroxide or meta-chloroperbenzoic acid. These hydroxylations take place regioselectively without other oxidation (N-oxide formation).

Tetrahedron published new progress about Aromatic nitrogen heterocycles Role: RCT (Reactant), SPN (Synthetic Preparation), RACT (Reactant or Reagent), PREP (Preparation). 96630-88-5 belongs to class pyridine-derivatives, and the molecular formula is C5H4ClNO, SDS of cas: 96630-88-5.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Thuery, Pierre; Harrowfield, Jack published the artcile< Contrasting Structure-Directing Effects in the Uranyl-Phthalate/Isophthalate Isomer Systems>, Category: pyridine-derivatives, the main research area is crystal growth mol structure directing uranyl phthalate isophthalate isomer.

Reaction of uranyl cations with phthalic (H2pht) or isophthalic (H2ipht) acids under solvohydrothermal conditions was performed in the presence of 3d-block metal cations associated with chelating nitrogen donors to give nine zero-, mono-, and diperiodic complexes. [UO2(pht)2Zn(phen)2]2·4H2O (1), where phen is 1,10-phenanthroline, is a heterometallic, tetranuclear complex, while the counterion separation in [Ni(bipy)3][UO2(pht)(NO3)]2 (2), where bipy is 2,2′-bipyridine, yields a monoperiodic, helical uranyl ion complex crystallizing in a pure enantiomeric form. The diperiodic network in [Ni(phen)3][(UO2)3(O)(pht)3]·6H2O (3) displays pseudotrigonal, cuplike cavities containing part of the bulky counterions. [(UO2)2(O)(pht)2Ni(cyclam)(H2O)]2·H2O (4), where cyclam is 1,4,8,11-tetraazacyclotetradecane, is a discrete, bis(μ3-oxo)-bridged tetranuclear uranyl complex of common geometry, to which two Ni(cyclam)2+ moieties are attached through oxo bonding to uranyl. Separation of the 3d-block metal ion complex in [Ni(cyclam)]2[(UO2)7(pht)8(NO3)2] (5) and [Cu(R,S-Me6cyclam)][(UO2)5(O)2(pht)4(H2O)2]·4H2O (6), where R,S-Me6cyclam is 7(R),14(S)-5,5,7,12,12,14-hexamethylcyclam, results in the formation of quasi-planar diperiodic networks hydrogen bonded to the counterions. The three isophthalate complexes [(UO2)2(ipht)3Cu(bipy)2]·H2O (7), [(UO2)2(ipht)2(HCOO)2Ni(cyclam)] (8), and [(UO2)2(ipht)2(HCOO)2Cu(R,S-Me6cyclam)] (9) crystallize as heterometallic diperiodic species with Cu(bipy)22+ being only decorating in 7, while Ni2+ and Cu2+ in 8 and 9 bridge uranyl-containing chains into a network with a V2O5 topol.

Crystal Growth & Design published new progress about Crystal growth. 366-18-7 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, Category: pyridine-derivatives.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Hu, Yongke; Xia, Jiawei; Li, Jin; Li, Huaju; Li, Yanxing; Li, Shaozhong; Duanmu, Chuansong; Li, Bindong; Wang, Xin published the artcile< Direct oxidative esterification of alcohols catalyzed by a nitrogen-doped carbon black-supported PdBi bimetallic catalyst under ambient conditions>, Electric Literature of 93-60-7, the main research area is PdBi bimetallic catalyzed oxidative esterification alc; aryl ester preparation PdBi bimetallic catalyzed oxidative esterification.

A highly efficient nitrogen-doped carbon black (NCB)-supported PdBi alloy nanocatalyst has been fabricated via a facile coredn. wet chem. approach. The optimal PdBi/NCB shows outstanding catalytic performance with broad substrate scope, good functional group tolerance towards direct oxidative esterification of alcs. under mild conditions in a heterogeneous catalytic system with air as the sole oxidant. A variety of benzylic and allylic alcs. were smoothly reacted with methanol and even with long-chain aliphatic alcs., providing desired esters in good to excellent yields. Moreover, the as-prepared catalyst is easily recycled and can be reused at least five times without a significant loss of catalytic activity. Superior catalytic activity is mainly attributable to the unique structure of the catalyst, including synergetic electronic effect between Pd and Bi, as well as modulated surface character by acidification and N doping for better active components’ anchoring and dispersion, as well as reactants’ adsorption. This study provides a facial, practical, eco-friendly and efficient catalytic system for oxidative esterification of alcs. and shows promising prospect in industrial production

Journal of Materials Science published new progress about Alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Electric Literature of 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem