Tag: M.W=100-150

Hameed P, Shahul; Raichurkar, Anandkumar; Madhavapeddi, Prashanti; Menasinakai, Sreenivasaiah; Sharma, Sreevalli; Kaur, Parvinder; Nandishaiah, Radha; Panduga, Vijender; Reddy, Jitendar; Sambandamurthy, Vasan K.; Sriram, D. published the artcile< Benzimidazoles: Novel Mycobacterial Gyrase Inhibitors from Scaffold Morphing>, Formula: C5H6FN3, the main research area is benzimidazole DNA gyrase inhibitor scaffold morphing Mycobacterium; DNA gyrase; NBTIs; Tuberculosis; aminopiperidines; benzimidazoles; type II topoisomerases.

Type II topoisomerases are well conserved across the bacterial species, and inhibition of DNA gyrase by fluoroquinolones has provided an attractive option for treatment of tuberculosis (TB). However, the emergence of fluoroquinolone-resistant strains of Mycobacterium tuberculosis (Mtb) poses a threat for its sustainability. A scaffold hopping approach using the binding mode of novel bacterial topoisomerase inhibitors (NBTIs) led to the identification of a novel class of benzimidazoles as DNA gyrase inhibitors with potent anti-TB activity. Docking of benzimidazoles to a NBTI bound crystal structure suggested that this class of compound makes key contacts in the enzyme active site similar to the reported NBTIs. This observation was further confirmed through the measurement of DNA gyrase inhibition, and activity against Mtb strains harboring mutations that confer resistance to aminopiperidines based NBTIs and Mtb strains resistant to moxifloxacin. Structure-activity relationship modification at the C-7 position of the left-hand side ring provided further avenue to improve hERG selectivity for this chem. series that has been the major challenges for NBTIs.

ACS Medicinal Chemistry Letters published new progress about DNA gyrases Role: BSU (Biological Study, Unclassified), BIOL (Biological Study) (inhibitors). 212268-13-8 belongs to class pyridine-derivatives, and the molecular formula is C5H6FN3, Formula: C5H6FN3.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zhao, Li-Xia; Peng, Jian-Feng; Liu, Feng-Yi; Zou, Yue-Li; Gao, Shuang; Fu, Ying; Ye, Fei published the artcile< Design, Synthesis, and Herbicidal Activity of Diphenyl Ether Derivatives Containing a Five-Membered Heterocycle>, Product Details of C6H4F3N, the main research area is herbicide phenoxypyridine heterocycle derivative preparation protoporphyrinogen oxidase inhibitor; PPO; cumulative analysis; diphenyl ether derivatives; field trial; greenhouse herbicidal activity; molecular docking.

Protoporphyrinogen oxidase (PPO, EC 1.3.3.4) is an important target for discovering novel herbicides, and it causes bleaching symptoms by inhibiting the synthesis of chlorophyll and heme. In this study, the active fragments of several com. herbicides were joined by substructure splicing and bioisosterism, and a series of novel di-Ph ether derivatives containing five-membered heterocycles were synthesized. The greenhouse herbicidal activity and the PPO inhibitory activity in vitro were discussed in detail. The results showed that most compounds had good PPO inhibitory activity, and target compounds containing trifluoromethyl groups tended to have higher activity. Among them, compound (I) showed the best inhibitory activity, with a half-maximal inhibitory concentration (IC50) of 0.0468 μmol/L, which was approx. 3 times better than that of oxyfluorfen (IC50 = 0.150 μmol/L). In addition, mol. docking indicated that compound I formed obvious π-π stacking interactions and hydrogen bond interactions with PHE-392 and ARG-98, resp. Remarkably, compound I had good safety for corn, wheat, rice, and soybean, and the cumulative concentration in crops was lower than that of oxyfluorfen. Therefore, compound I can be used to develop potential lead compounds for novel PPO inhibitors.

Journal of Agricultural and Food Chemistry published new progress about Abutilon theophrasti. 3796-23-4 belongs to class pyridine-derivatives, and the molecular formula is C6H4F3N, Product Details of C6H4F3N.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Salinas, Yolanda; Brueggemann, Oliver; Monkowius, Uwe; Teasdale, Ian published the artcile< Visible light photocleavable ruthenium-based molecular gates to reversibly control release from mesoporous silica nanoparticles>, Category: pyridine-derivatives, the main research area is ruthenium silicon nanoparticle delivery controlled release visible light irradiation; cargo release on demand; mesoporous silica nanoparticles (MSNs); molecular gates; reversibility; ruthenium complex; visible light photocleavage.

Herein we present hybrid mesoporous silica nanomaterials (MSN) with visible light-sensitive ruthenium complexes acting as gates. Two different [Ru(bpy)2L1L2]2+ complexes were investigated by grafting [Ru(bpy)2(4AMP)2](PF6)2 (RC1) and [Ru(bpy)2(PPh3)Cl]Cl (RC2) via two or one ligands onto the surface of mesoporous silica nanoparticles (MSNs), to give MSN1-RC1 and MSN2-RC2, resp. The pores were previously loaded with a common dye, safranin O, and release studies were conducted. The number and position of the ligands were shown to influence the photocages behavior and thus the release of the cargo. Release studies from MSN1-RC1 in acetonitrile showed that in the dark the amount of dye released was minimal after 300 min, whereas a significant increase was measured upon visible light irradiation (ca. 90%). Release studies from the second nanomaterial MSN2-RC2, where the complex RC2 was bound to the MSN via only one ligand, showed stability under darkness and in aqueous solution up to 180 min and, rapid release of the dye when irradiated with visible light. Furthermore, this system was demonstrated to be reversible, since, upon heating to 80°C, the system could effectively re-close the pores and re-open it again upon visible light irradiation

Nanomaterials published new progress about Ligands Role: THU (Therapeutic Use), BIOL (Biological Study), USES (Uses). 3731-53-1 belongs to class pyridine-derivatives, and the molecular formula is C6H8N2, Category: pyridine-derivatives.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Hou, Lixia; Zhang, Yujin; Li, Cuicui; Wang, Xuede; Wang, Selina C. published the artcile< Determination of main bitter compounds in soaked and germinated sesame pastes>, HPLC of Formula: 93-60-7, the main research area is sesame paste germination soaking bitter compound determination; bitterness; germination; non-volatile; sesame pastes; volatile compounds.

The flavor and taste of the foods play an important or even a decisive role in the acceptance and preference of the consumers. It was found that the sesame paste prepared with the germinated sesame seeds was bitter in our previous experiment In the study, the volatile and non-volatile bitter-taste components of the sesame paste samples were comprehensively analyzed. 2-methylbutanal, hexanal, acetic acid, and butyric acid were the predominant volatile compounds in the soaked and germinated sesame pastes. Oxalate was significantly reduced by the germination (p < 0.05). The contents of sesaminoltriglucoside in sesame pastes ranged from 129.04 to 217.57μg/g. Both total and individual free amino acid contents increased with the prolongation of the germinating time. The bitter-taste amino acid Arg had the highest score of Taste Activity Value for the bitterest sample made from the seeds germinated for 36 h. The bitter-tasting Arg was first reported to impart a bitter taste to the germinated sesame paste. Journal of Oleo Science published new progress about Acids Role: ANT (Analyte), FFD (Food or Feed Use), ANST (Analytical Study), BIOL (Biological Study), USES (Uses). 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, HPLC of Formula: 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Liu, Jianguo; Chen, Jia-Yi; Jia, Mengjing; Ming, Bangrong; Jia, Jiong; Liao, Rong-Zhen; Tung, Chen-Ho; Wang, Wenguang published the artcile< Ni-O Cooperation versus Nickel(II) Hydride in Catalytic Hydroboration of N-Heteroarenes>, Quality Control of 93-60-7, the main research area is cyclopentadienyl nickel phosphinophenolate preparation catalyst hydroboration heteroarene pyridine kinetics; crystal structure cyclopentadienyl nickel phosphinophenolate phosphinothiophenolate complex borate adduct; mol structure cyclopentadienyl nickel phosphinophenolate phosphinothiophenolate complex borate adduct; potential energy surface nickel phosphinophenolate catalyst hydroboration pyridine.

An air-stable half-sandwich Ni(II) complex bearing a phosphinophenolato ligand, Cp*Ni(1,2-Ph2PC6H4O) (1), was designed and synthesized for activation of HBpin and catalytic hydroboration of N-heteroarenes such as pyridine. Through addition of the H-B bond across the Ni-O bond, 1 reacts with HBpin to afford an 18-electron Ni(II)-H intermediate [H1(Bpin)] featuring an O-stabilized B moiety, which readily reduces pyridine analogs to give the 1,2-hydroborated product, thus accomplishing the catalytic cycle under mild conditions. The necessity of the phosphinophenolato ligand to deliver the boryl group was manifested by the clear difference in the activity of 1 and Cp*NiH(PPh3) (3H) in catalytic hydroborations. The latter lacks a functional O atom and is inert to process the catalysis.

ACS Catalysis published new progress about Aromatic hydrocarbons Role: PEP (Physical, Engineering or Chemical Process), PRP (Properties), RCT (Reactant), PROC (Process), RACT (Reactant or Reagent) (N-heteroarenes). 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Quality Control of 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zeng, Xiaojun; Yan, Wenhao; Zacate, Samson B.; Cai, Aijie; Wang, Yufei; Yang, Dongqi; Yang, Kundi; Liu, Wei published the artcile< Copper-Catalyzed Deaminative Difluoromethylation>, SDS of cas: 3731-53-1, the main research area is copper catalyst deaminative difluoromethylation alkyl amine; copper; deamination; difluoromethylation; homogeneous catalysis; pyridinium salts.

The difluoromethyl group (CF2H) is considered to be a lipophilic and metabolically stable bioisostere of an amino (NH2) group. Therefore, methods that can rapidly convert an NH2 group into a CF2H group would be of great value to medicinal chem. The authors report herein an efficient Cu-catalyzed approach for the conversion of alkyl pyridinium salts, which can be readily synthesized from the corresponding alkyl amines, to their alkyl difluoromethane analogs. This method tolerates a broad range of functional groups and can be applied to the late-stage modification of complex amino-containing pharmaceuticals.

Angewandte Chemie, International Edition published new progress about Amines Role: RCT (Reactant), RACT (Reactant or Reagent). 3731-53-1 belongs to class pyridine-derivatives, and the molecular formula is C6H8N2, SDS of cas: 3731-53-1.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Rashed, Nurnobi Md.; Masuda, Koichiro; Ichitsuka, Tomohiro; Koumura, Nagatoshi; Sato, Kazuhiko; Kobayashi, Shu published the artcile< Zirconium Oxide-Catalyzed Direct Amidation of Unactivated Esters under Continuous-Flow Conditions>, Product Details of C7H7NO2, the main research area is amine ester zirconium catalyst amidation green chem; amide preparation.

A sustainable and environmentally benign direct amidation reaction of unactivated esters with amines was developed in a continuous-flow system. A com. available amorphous zirconium oxide was found to be an efficient catalyst for this reaction. While the typical amidation of esters with amines required a stoichiometric amount of a promoter or metal activator, the present continuous-flow method enabled the direct amidation reaction under additive-free conditions with an extensive diversity towards various functional groups. High yields of the products were obtained with a nearly equimolar proportion of starting materials to reduce byproduct formation, which rendered this process applicable for use in a sequential-flow system.

Advanced Synthesis & Catalysis published new progress about Amidation. 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Product Details of C7H7NO2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Attatsi, Isaac Kwaku; Zhu, Weihua; Liang, Xu published the artcile< Noncovalent immobilization of Co(II) porphyrin through axial coordination as an enhanced electrocatalyst on carbon electrodes for oxygen reduction and evolution>, Category: pyridine-derivatives, the main research area is cobalt tetraphenylporphyrin carbon nanotube glassy carbon oxygen reduction evolution.

Catalysis of fuel-producing reactions can be transferred from homogeneous solution to a surface via attachment of the mol. catalyst. A pyrene-pyridine hybrid (Py-Py) was used as an axial ligand to bridge Co(II)tetraphenylporphyrin which was finally immobilized on carbon nanotubes via noncovalent interactions and further deposited on glassy carbon. This noncovalent immobilization of Co(II)porphyrin through axial coordination provides significantly enhanced electrochem. catalyzed oxygen reduction and oxygen evolution, illustrating a new insight into understanding surface catalysis.

New Journal of Chemistry published new progress about Bifunctional catalysts. 3731-53-1 belongs to class pyridine-derivatives, and the molecular formula is C6H8N2, Category: pyridine-derivatives.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Cheda, Aneta; Nowosielska, Ewa M.; Gebicki, Jerzy; Marcinek, Andrzej; Chlopicki, Stefan; Janiak, Marek K. published the artcile< A derivative of vitamin B3 applied several days after exposure reduces lethality of severely irradiated mice>, Reference of 350-03-8, the main research area is vitamin B3 lethality anti inflammatory agent.

Most, if not all, of the hitherto tested substances exert more or less pronounced pro-survival effects when applied before or immediately after the exposure to high doses of ionizing radiation. In the present study we demonstrate for the first time that 1-Me nicotinamide (MNA), a derivative of vitamin B3, significantly (1.6 to 1.9 times) prolonged survival of BALB/c mice irradiated at LD30/30 (6.5 Gy), LD50/30 (7.0 Gy) or LD80/30 (7.5 Gy) of γ-rays when the MNA administration started as late as 7 days post irradiation A slightly less efficient and only after the highest dose (7.5 Gy) of γ-rays was another vitamin B3 derivative, 1-methyl-3-acetylpyridine (1,3-MAP) (1.4-fold prolonged survival). These pro-survival effects did not seem to be mediated by stimulation of haematopoiesis, but might be related to anti-inflammatory and/or anti-thrombotic properties of the vitamin B3 derivatives Our results show that MNA may represent a prototype of a radioremedial agent capable of mitigating the severity and/or progression of radiation-induced injuries when applied several hours or days after exposure to high doses of ionizing radiation.

Scientific Reports published new progress about Anti-inflammatory agents. 350-03-8 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO, Reference of 350-03-8.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Bregman, Howard; Simard, Jeffrey R.; Andrews, Kristin L.; Ayube, Shawn; Chen, Hao; Gunaydin, Hakan; Guzman-Perez, Angel; Hu, Jiali; Huang, Liyue; Huang, Xin; Krolikowski, Paul H.; Lehto, Sonya G.; Lewis, Richard T.; Michelsen, Klaus; Pegman, Pamela; Plant, Matthew H.; Shaffer, Paul L.; Teffera, Yohannes; Yi, Shuyan; Zhang, Maosheng; Gingras, Jacinthe; DiMauro, Erin F. published the artcile< The Discovery and Hit-to-Lead Optimization of Tricyclic Sulfonamides as Potent and Efficacious Potentiators of Glycine Receptors>, HPLC of Formula: 55279-29-3, the main research area is sulfonamide glycine receptor analgesic pain.

Current pain therapeutics suffer from undesirable psychotropic and sedative side-effects, as well as abuse potential. Glycine receptors (GlyRs) are inhibitory ligand-gated ion channels expressed in nerves of the spinal dorsal horn, where their activation is believed to reduce transmission of painful stimuli. Herein, the authors describe the identification and hit-to-lead optimization of a novel class of tricyclic sulfonamides as allosteric GlyR potentiators. Initial optimization of high-throughput screening (HTS) hit led to the identification of a compound, which demonstrated ex vivo potentiation of glycine-activated current in mouse dorsal horn neurons from spinal cord slices. Further improvement of potency and pharmacokinetics produced in vivo proof-of-concept tool mol. I (AM-1488) which reversed tactile allodynia in a mouse spared-nerve injury (SNI) model. Addnl. structural optimization provided highly potent potentiator II (AM-3607), which was cocrystd. with human GlyRα3cryst to afford the first described potentiator-bound x-ray cocrystal structure within this class of ligand-gated ion channels (LGICs).

Journal of Medicinal Chemistry published new progress about Analgesics. 55279-29-3 belongs to class pyridine-derivatives, and the molecular formula is C6H6N2O, HPLC of Formula: 55279-29-3.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem