Category: pyridine-derivatives

Xie, Demeng; Wang, Yingwei; Zhang, Xia; Fu, Zhengyan; Niu, Dawen published the artcile< Alkyl/Glycosyl Sulfoxides as Radical Precursors and Their Use in the Synthesis of Pyridine Derivatives>, COA of Formula: C6H4F3N, the main research area is pyridine alkyl regioselective preparation; alkyl glycosyl sulfoxide regioselective stereoselective photochem alkylation methoxypyridinium; Alkyl Sulfoxides; C-Glycosides; Electron Donor-Acceptor Complexes; Photochemistry; Radicals.

Here the use of simple and readily available alkyl sulfoxides as precursors to radicals and their application in the preparation of pyridine derivatives are reported. It was shown that alkyl sulfoxides, N-methoxy pyridinium salts and fluoride anions form electron donor-acceptor (EDA) complexes in solution, which, upon visible light irradiation, undergo a radical chain process to afford various pyridine derivatives smoothly. This reaction displays broad scope with respect to both sulfoxides and N-methoxy pyridinium salts. The synthetic versatility of sulfoxides as a handle in chem. adds to their power as radical precursors. Glycosyl sulfoxides are converted to the corresponding pyridyl C-glycosides with high stereoselectivities. Computational and exptl. studies provide insights into the reaction mechanism.

Angewandte Chemie, International Edition published new progress about Alkylation, regioselective. 3796-23-4 belongs to class pyridine-derivatives, and the molecular formula is C6H4F3N, COA of Formula: C6H4F3N.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Gujjarappa, Raghuram; Vodnala, Nagaraju; Musib, Dulal; Malakar, Chandi C. published the artcile< Organocatalytic Decarboxylation and Dual C(sp3)-H Bond Functionalization Toward Facile Access to Divergent 2,6-Diarylpyridines>, Electric Literature of 350-03-8, the main research area is diarylpyridine preparation; ketone amino acid decarboxylation proline catalyst.

An effective organocatalytic protocol toward the assembly of sym. and unsym. 2,6-diarylpyridines I (R1 = H, Me, CN; R2 = Ph, 4-methylphenyl, 2H-1,3-benzodioxol-5-yl, etc.; R3 = Ph, 4-nitrophenyl, pyridin-3-yl, etc.) is demonstrated. The reaction proceeds through organocatalytic decarboxylation of amino acids R4CH(NH2)C(O)OH and dual C(sp3)-H bond oxidation of carbonyl compounds R1CH2C(O)R2 and R1CH2C(O)R3. Catalyst screening revealed that explicit choice of L-proline could lead to the formation of product with maximum yield and selectivity. The developed process appears with operational simplicity and is consistent with broad range of functional groups.

Asian Journal of Organic Chemistry published new progress about Amino acids Role: RCT (Reactant), RACT (Reactant or Reagent). 350-03-8 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO, Electric Literature of 350-03-8.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Fu, Ming-Chen; Shang, Rui; Zhao, Bin; Wang, Bing; Fu, Yao published the artcile< Photocatalytic decarboxylative alkylations mediated by triphenylphosphine and sodium iodide>, Related Products of 350-03-8, the main research area is photocatalytic decarboxylative alkylation triphenylphosphine sodium iodide.

Most photoredox catalysts in current use are precious metal complexes or synthetically elaborate organic dyes, the cost of which can impede their application for large-scale industrial processes. We found that a combination of triphenylphosphine and sodium iodide under 456-nm irradiation by blue light-emitting diodes can catalyze the alkylation of silyl enol ethers by decarboxylative coupling with redox-active esters in the absence of transition metals. Deaminative alkylation using Katritzky’s N-alkylpyridinium salts and trifluoromethylation using Togni’s reagent are also demonstrated. Moreover, the phosphine/iodide-based photoredox system catalyzes Minisci-type alkylation of N-heterocycles and can operate in tandem with chiral phosphoric acids to achieve high enantioselectivity in this reaction.

Science (Washington, DC, United States) published new progress about Acid catalysis (chiral Bronsted acid). 350-03-8 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO, Related Products of 350-03-8.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Eastman, Kyle J.; Parcella, Kyle; Yeung, Kap-Sun; Grant-Young, Katharine A.; Zhu, Juliang; Wang, Tao; Zhang, Zhongxing; Yin, Zhiwei; Beno, Brett R.; Sheriff, Steven; Kish, Kevin; Tredup, Jeffrey; Jardel, Adam G.; Halan, Vivek; Ghosh, Kaushik; Parker, Dawn; Mosure, Kathy; Fang, Hua; Wang, Ying-Kai; Lemm, Julie; Zhuo, Xiaoliang; Hanumegowda, Umesh; Rigat, Karen; Donoso, Maria; Tuttle, Maria; Zvyaga, Tatyana; Haarhoff, Zuzana; Meanwell, Nicholas A.; Soars, Matthew G.; Roberts, Susan B.; Kadow, John F. published the artcile< The discovery of a pan-genotypic, primer grip inhibitor of HCV NS5B polymerase>, Application In Synthesis of 777931-67-6, the main research area is hepatitis C virus NS5B polymerase 7 azabenzofuran.

The development of a series of novel 7-azabenzofurans exhibiting pan-genotype inhibition of HCV NS5B polymerase via binding to the primer grip site is presented. Many challenges, including poor oral bioavailability, high clearance, bioactivation, high human serum shift, and metabolic stability were encountered and overcome through SAR studies. This work culminated in the selection of BMS-986139 (43) as a preclin. candidate.

MedChemComm published new progress about Blood serum. 777931-67-6 belongs to class pyridine-derivatives, and the molecular formula is C6H5BrClNO, Application In Synthesis of 777931-67-6.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Fier, Patrick S.; Kim, Suhong; Cohen, Ryan D. published the artcile< A Multifunctional Reagent Designed for the Site-Selective Amination of Pyridines>, Synthetic Route of 3796-23-4, the main research area is Boc protected aminopyridine chemoselective regioselective preparation; pyridine tert butyl chloro dicyanopyrazinyl oxy carbamate amination.

The development of a multifunctional reagent for the direct conversion of pyridines to Boc-protected 2-aminopyridines such as I [R = H, 3-Br, 4-Ph, etc.] with exquisite site selectivity and chemoselectivity was reported. The novel reagent was prepared on 200g scale in a single step, reacted in title reaction under mild conditions without precautions toward air or moisture, and is tolerant of nearly all common functionality. Exptl. and in situ spectroscopic monitoring techniques provided detailed insights and unexpected findings for the unique reaction mechanism.

Journal of the American Chemical Society published new progress about Amination, regioselective (chemoselective). 3796-23-4 belongs to class pyridine-derivatives, and the molecular formula is C6H4F3N, Synthetic Route of 3796-23-4.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zhang, Lin; Fan, Junhua; Chong, Jer-Hong; Cesena, Angela; Tam, Betty Y. Y.; Gilson, Charles; Boykin, Christina; Wang, Deping; Aivazian, Dikran; Marcotte, Doug; Xiao, Guangqing; Le Brazidec, Jean-Yves; Piao, Jinhua; Lundgren, Karen; Hong, Kevin; Vu, Khang; Nguyen, Khanh; Gan, Liang-Shang; Silvian, Laura; Ling, Leona; Teng, Min; Reff, Mitchell; Takeda, Nicole; Timple, Noel; Wang, Qin; Morena, Ron; Khan, Samina; Zhao, Shuo; Li, Tony; Lee, Wen-Cherng; Taveras, Arthur G.; Chao, Jianhua published the artcile< Design, synthesis, and biological evaluation of pyrazolopyrimidine-sulfonamides as potent multiple-mitotic kinase (MMK) inhibitors (part I)>, Related Products of 220731-04-4, the main research area is pyrazolopyrimidine sulfonamide preparation multiple mitotic kinase inhibitor.

A novel class of pyrazolopyrimidine-sulfonamides was discovered as selective dual inhibitors of aurora kinase A (AKA) and cyclin-dependent kinase 1 (CDK1). These inhibitors were originally designed based on an early lead (compound I). SAR development has led to the discovery of potent inhibitors with single digit nM IC50s towards both AKA and CDK1. An exemplary compound II has demonstrated good efficacy in an HCT116 colon cancer xenograft model.

Bioorganic & Medicinal Chemistry Letters published new progress about Alkylation. 220731-04-4 belongs to class pyridine-derivatives, and the molecular formula is C10H15N3O2, Related Products of 220731-04-4.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Lv, Tengteng; Song, Tongxiang; Liu, Huijie; Peng, Ruibing; Jiang, Xiamin; Zhang, Weiwei; Han, Qingxi published the artcile< Isolation and characterization of a virulence related Vibrio alginolyticus strain Wz11 pathogenic to cuttlefish, Sepia pharaonis>, HPLC of Formula: 366-18-7, the main research area is Vibrio Sepia virulence hemolysin gene; Bacterial swarming; Haemolysin; Sepia pharaonis; Siderophore production; Vibrio alginolyticus.

Vibrio alginolyticus is a ubiquitous marine opportunistic pathogen that can infect various hosts in marine environment. In the present study, V. alginolyticus strain Wz11 was isolated from diseased cuttlefish, Sepia pharaonis, with 20% of promoted death and high survival capacity in skin mucus and tissue liquid Its growth, siderophore production, and expressions of haemolysin and swarming related genes were characterized under iron limited conditions. The minimal inhibitory concentration (MIC) of 2,2-dipyridyl (DP) to V. alginolyticus strain Wz11 was 640μM. While growth of V. alginolyticus strain Wz11 was inhibited by DP, production of iron-seizing substances, haemolytic activity and swarming motility were increased. Moreover, expressions of haemolysin related genes tlh, tdh and vah and flagellar related genes flgH, fliC, fliD and fliS were also characterized using real-time reverse transcriptase PCR. Expression of tdh was up-regulated to 7.7-fold, while expressions of tlh and vah were down-regulated to 0.016-fold and 0.03-fold, resp. The expression of fliC, flgH, fliD and fliS was up-regulated to 4.9-, 3.8-, 8.6- and 4.5-fold, resp. Concluded from our results suggested that V. alginolyticus strain Wz11 was considered as a potential pathogen of S. pharaonis, and iron level played an important role in the production of iron-seizing substances, and activities of haemolysin and bacterial swarming as well as their related gene expressions.

Microbial Pathogenesis published new progress about Aeromonas hydrophila. 366-18-7 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, HPLC of Formula: 366-18-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Haemmerle, Michael; Le, Minh Hien; Hekmat, Omid published the artcile< GC-FID-based quantification of the sum of the three forms of vitamin B3 from animal liver>, Reference of 93-60-7, the main research area is gas chromatog flame ionization detector vitamin B3 liver; Flame ionization detection; Gas chromatography; Nicotinamide; Nicotinamide adenine dinucleotide; Nicotinic acid; Vitamin B(3).

Vitamin B3 (nicotinic acid, nicotinamide) is an essential water-soluble vitamin and cellular energy metabolism depends on the vitamin B3-derived cofactors. Inaccessible covalently-linked nicotinic acid in food such as maize can cause vitamin B3 deficiency in animals since maize is also deficient in tryptophan, the precursor of nicotinic acid. A sensitive and reproducible GC-FID-based method for the quantification of the sum of the three forms of vitamin B3 from animal liver was developed. Free nicotinic acid, free nicotinamide and nicotinamide moiety of NAD+/NADP+ (and their riboside precursors) were simultaneously derivatized as Me nicotinate. Reaction time and temperature and the extraction procedure for Me nicotinate were optimized. Starting from wild boar liver, removal of proteins, solvent exchange, derivatization, and chloroform extraction resulted in sufficient enrichment and baseline separation of Me nicotinate. The within-laboratory reproducibility of the full procedure was determined with relative standard deviation <10%. On-column limit of detection and lower limit of quantification for Me nicotinate were both sub-picomole. The accuracy of the method was determined from the recoveries of the pre-extraction spiked-in vitamin B3 standards The overall recovery for the full procedure was 16% but very consistent (relative standard deviation = 7%), enabling determination of apparent vitamin B3 concentrations for relative quant. comparison. Analytical Biochemistry published new progress about Esterification (methyl-). 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, Reference of 93-60-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Bej, Somnath; Nandi, Mandira; Ghosh, Pradyut published the artcile< Development of fluorophoric [2]pseudorotaxanes and [2]rotaxane: selective sensing of Zn(II)>, Name: 2,2′-Bipyridine, the main research area is .

Fluorophoric [2]pseudorotaxanes {NiPR1(ClO4)2-NiPR3(ClO4)2} are synthesized by utilizing newly designed fluorophoric bidentate ligands (L1-L3) and a heteroditopic naphthalene containing macrocycle (NaphMC) with high yields via Ni(II) templation and π-π stacking interactions. Subsequently, a fluorophoric [2]rotaxane (NAPRTX) is established through a Cu(I) catalyzed click reaction between an azide terminated pseudorotaxane, {NiPR4(ClO4)2}, which contains the newly designed fluorophoric ligand L4, and alkyne terminated bulky stopper units. All these fluorophoric [2]pseudorotaxanes and the [2]rotaxane were characterized using numerous techniques such as mass spectrometry, NMR, UV/Vis, PL, and elemental anal., wherever applicable. Furthermore, to investigate the effect of the fluorophoric moieties, the coordinating ability of chelating units, and size and shape of the three dimensional cavity generated by the mech. bond in the interlocked [2]rotaxane (NAPRTX), we have performed a sensing study of various metal ions. Thus, the interlocked [2]rotaxane is found to have potential as a selective fluorescent sensor for Zn(II) metal ions over other transition, alkali and alk. earth metal ions, where the 2,2′-bipyridyl arylvinylene moiety of the axle acts as a fluorescence signalling unit.

Organic & Biomolecular Chemistry published new progress about 366-18-7. 366-18-7 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, Name: 2,2′-Bipyridine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Gupta, Shivangi; Maji, Ankur; Panja, Dibyajyoti; Halder, Mita; Kundu, Sabuj published the artcile< CuO NPs catalyzed synthesis of quinolines, pyridines, and pyrroles via dehydrogenative coupling strategy>, Recommanded Product: 1-(Pyridin-3-yl)ethanone, the main research area is hydroxymethyl aniline ketone copper nanocatalyst oxidative coupling reaction; quinoline preparation; hydroxypropanamine ketone copper nanocatalyst oxidative coupling reaction; pyridine preparation; hydroxyethanamine ketone copper nanocatalyst oxidative coupling reaction; pyrrole preparation.

Copper oxide nanoparticles catalyzed efficient synthesis of quinolines, pyridines, and pyrroles via alc. dehydrogenative coupling strategy are reported. Employing this catalytic system, various functionalized quinolines, pyridines, and pyrroles were synthesized efficiently from different amino alcs. with a diverse range of ketones. A number of control experiments were performed to shed light on the mechanism. This catalyst was recycled up to 6th run and notably, no significant loss was observed in its catalytic activity.

Journal of Catalysis published new progress about Amino alcohols Role: RCT (Reactant), RACT (Reactant or Reagent). 350-03-8 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO, Recommanded Product: 1-(Pyridin-3-yl)ethanone.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem