Category: pyridine-derivatives

Timmer, Niels; Gore, David; Sanders, David; Gouin, Todd; Droge, Steven T. J. published the artcile< Application of seven different clay types in sorbent-modified biodegradability studies with cationic biocides>, HPLC of Formula: 123-03-5, the main research area is cetyltrimethylammonium bromide cetylpyridinium chloride clay sorbent biodegradation toxicity mitigation; Bioaccessibility; Cationic surfactant; Clay minerals; Environmental risk assessment; Ready biodegradability testing; Toxicity mitigation.

The cationic surfactants cetyltrimethylammonium bromide (CTAB) and cetylpyridinium chloride (CPC) can exert inhibitory effects on micro-organisms responsible for their biodegradation However, under environmentally relevant exposure scenarios the presence of and sorption to organic and inorganic matter can lead to significant reduction of inhibitory effects. In our studies we investigated silica gel and seven clays as inert sorbents to mitigate these inhibitory effects in a 28 day manometric respirometry biodegradation test. CTAB was not inhibitory to the used inoculum, but we did observe that seven out of eight sorbents increased maximum attainable biodegradation, and four out of eight decreased the lag phase. The strongly inhibitory effect of CPC was successfully mitigated by most sorbents, with five out of eight allowing >50% biodegradation within 28 days. Results further indicate that bioaccessibility of the sorbed fractions in the stirred manometric test systems was higher than in calmly shaken headspace test systems. Bioaccessibility might also be limited depending on characteristics of test chem. and sorbent type, with montmorillonite and bentonite apparently providing the lowest level of bioaccessibility with CPC. Clay sorbents can thus be used as environmentally relevant sorbents to mitigate potential inhibitory effects of test chems., but factors that impede bioaccessibility should be considered. In addition to apparently increased bioaccessibility due to stirring, the automated manometric respirometry test systems give valuable and highly cost-effective insights into lag phase and biodegradation kinetics; information that is especially relevant for test chems. of gradual biodegradability.

Chemosphere published new progress about Bentonite Role: PEP (Physical, Engineering or Chemical Process), PROC (Process). 123-03-5 belongs to class pyridine-derivatives, and the molecular formula is C21H38ClN, HPLC of Formula: 123-03-5.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Beebeejaun-Boodoo, B. M. P.; Rademeyer, Melanie published the artcile< Coordination polymers and metallocycles of metal halides with n-(aminomethyl)pyridine, n = 3 or 4: Structures and solid-state fluorescence>, Name: Pyridin-4-ylmethanamine, the main research area is cobalt mercury halo aminomethylpyridine coordination polymer metallocycle preparation; crystal structure cobalt mercury halo aminomethylpyridine coordination polymer metallocycle; fluorescence cobalt mercury halo aminomethylpyridine coordination polymer metallocycle.

Coordination polymers and metallocycles formed by the reactions of CoX2 or HgX2, X = Cl-, Br- or I-, with the ditopic organic ligands (L) 3-(aminomethyl)pyridine, 3amp, or 4-(aminomethyl)pyridine, 4amp, are reported. The combination of L = 4amp with CoCl2, CoBr2 or HgI2 yielded one-dimensional coordination polymers of composition [M(L)(X)2]∞, in which the metal ion displays a tetrahedral geometry. Only the combination of L = 3amp with CoCl2 gave a one-dimensional coordination polymer, while the rest of the structures containing this organic ligand were comprised of metallocycles. The metallocyclic rings have a composition [M2(L)2(X)4]n, with n = 1 for L = 3amp and HgBr2, and n = 2 for L = 3amp and CoBr2 or HgI2. Strong N-H. X-M hydrogen bonding interactions are observed in both the coordination polymer and metallocycle structures. The solid-state fluorescence spectra of selected compounds are reported.

Polyhedron published new progress about Coordination polymers Role: RCT (Reactant), RACT (Reactant or Reagent). 3731-53-1 belongs to class pyridine-derivatives, and the molecular formula is C6H8N2, Name: Pyridin-4-ylmethanamine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Gilchrist, T. L. published the artcile< Product class 3: arynes>, Safety of 3-Chloro-2-methoxypyridine, the main research area is review aryne preparation organic synthesis.

A review of methods to prepare arynes.

Science of Synthesis published new progress about Alkynes, arynes Role: SPN (Synthetic Preparation), PREP (Preparation). 13472-84-9 belongs to class pyridine-derivatives, and the molecular formula is C6H6ClNO, Safety of 3-Chloro-2-methoxypyridine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Ritter, Helmut; Kaiser, M. published the artcile< Proton NMR spectra of nitrated aminopyridines>, Related Products of 21901-29-1, the main research area is NMR nitrated aminopyridine hydrogen bond; pyridine aminonitro NMR; steric hindrance hydrogen bond aminonitropyridine.

The 1H NMR spectra of 26 nitrated aminopyridines were measured and interpreted. Chem. shift assignments were based on existing chem. shift rules for substituted pyridines and spectral comparison with compounds of similar structure. Some o-aminonitropyridines were found to give a splitting of the amino signals due to intermol. hydrogen bonding; steric hindrance is shown to influence this bonding.

Magnetic Resonance in Chemistry published new progress about Intramolecular hydrogen bond. 21901-29-1 belongs to class pyridine-derivatives, and the molecular formula is C6H7N3O2, Related Products of 21901-29-1.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Hou, Xiaoya; Zhou, Sen; Li, Yuli; Guo, Minjie; Zhao, Wentao; Tang, Xiangyang; Wang, Guangwei published the artcile< Synthesis of Indolizines from Pyridinium Salts and Ethyl Bromodifluoroacetate>, COA of Formula: C7H7NO2, the main research area is indolizine synthesis annulation pyridinium salt bromodifluoroacetate.

Here we present a novel annulation of pyridinium salts with BrCF2CO2Et to access the indolizine derivatives with high efficiency. The α substitution of pyridine plays a key role in determining the reaction pathways. Various types of indolizines can be conveniently accessed from easily available pyridinium salts under mild and simple reaction conditions.

Organic Letters published new progress about Cyclization, regioselective. 93-60-7 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO2, COA of Formula: C7H7NO2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Wang, Shuni; Yang, Hong; Su, Mingbo; Lian, Fulin; Cong, Zhanqing; Wei, Rongrui; Zhou, Yubo; Li, Xingjun; Zheng, Xingling; Li, Chunpu; Fu, Xuhong; Han, Xu; Shi, Qiongyu; Li, Cong; Zhang, Naixia; Geng, Meiyu; Liu, Hong; Li, Jia; Huang, Xun; Wang, Jiang published the artcile< 5-Aminonaphthalene derivatives as selective nonnucleoside nuclear receptor binding SET domain-protein 2 (NSD2) inhibitors for the treatment of multiple myeloma>, Formula: C6H8N2, the main research area is aminonaphthalene sulfonamide preparation NSD2 inhibitor SAR antitumor apoptosis human; 5-Aminonaphthalene derivatives; HTS; Inhibitor; Methyltransferase; Multiple myeloma; NSD2.

Using high-throughput screening (HTS) with biol. analyzes, a series of 5-aminonaphthalene derivatives such as I [X = CO, SO2; R1 = NHCH2Ph, NHPh, NHCH2(4-FC6H4), etc.; R2 = H, NH2, NMe2, etc.] were designed and synthesized as novel NSD2 inhibitors. Among all the prepared compounds, I [R1 = NHCH2Ph, R2 = NH2] displayed a good NSD2 inhibitory activity (IC50 = 2.7μM) and selectivity against both SET-domain-containing and non-SET-domain-containing methyltransferases. Preliminary research indicated the inhibition mechanism of compound I [X = SO2, R1 = NHCH2Ph, R2 = NH2 (II)] by significantly suppressed the methylation of H3K36me2. Compound II specifically inhibited the proliferation of the human B cell precursor leukemia cell line RS4:11 and the human myeloma cell line KMS11 by inducing cell cycle arrest and apoptosis with little cytotoxicity. It was reported that the anti-cancer effect of compound II was partly achieved by completely suppressing the transcriptional activation of NSD2-targeted genes.

European Journal of Medicinal Chemistry 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, Formula: C6H8N2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Bhattacharyya, Manjit K.; Gogoi, Anshuman; Chetry, Sanjib; Dutta, Debajit; Verma, Akalesh K.; Sarma, Bipul; Franconetti, Antonio; Frontera, Antonio published the artcile< Antiproliferative evaluation and supramolecular association in Mn(II) and Zn(II) bipyridine complexes: Combined experimental and theoretical studies>, SDS of cas: 366-18-7, the main research area is manganese methylbenzoate bipyridine complex preparation crystal mol structure antiproliferative; zinc pyridinedicarboxylate bipyridine complex preparation crystal mol structure antiproliferative; Apoptosis; Cooperativity; Cytotoxicity; Docking; T-cell lymphoma; π–π stacking.

Two new coordination complexes viz. [Mn2(μ-O,O’-4-Mebz)2(bpy)2(μ2-H2O)(4-Mebz)2] (1) and [Zn(bpy)(pdc)(H2O)]·3.5H2O (2) (where bpy = 2,2′-bipyridine, 4-Mebz = 4-Me benzoate and pdc = 2,6-pyridine dicarboxylate) were synthesized and structurally characterized by single crystal x-ray diffraction, FT-IR, electronic spectroscopy, Thermogravimetric Anal. (TGA) and Powder x-ray diffraction (PXRD) techniques. Complex 1 consists of a dinuclear Mn(II) unit bridged by a solvent water mol. while 2 is a mononuclear complex. The supramol. assemblies found in the solid state of both complexes have been described. In 2, several π-stacking interactions modes have been further studied using D. Functional Theory (DFT) calculations Furthermore, the activity of the complexes against a few pathogenic bacteria has been studied and confirmed. Finally, the antiproliferative activities of both complexes have been studied in T-cell lymphoma cell line by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, apoptosis assay and mol. docking simulation. Both the complexes exhibit gratifying cytotoxicity through apoptotic cell death with negligible cytotoxicity (∼5-10%) in normal cells. It is worth mentioning that Mn(II) and Zn(II) complexes exhibit interaction modes with highly expressed cancer target proteins under study with higher binding affinity and the results are comparable with reference inhibitors.

Journal of Inorganic Biochemistry published new progress about Antibacterial agents. 366-18-7 belongs to class pyridine-derivatives, and the molecular formula is C10H8N2, SDS of cas: 366-18-7.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Zhong, Jia-Yu; Cui, Xing-Jun; Zhan, Jun-Kun; Wang, Yan-Jiao; Li, Shuang; Lin, Xiao; Xiang, Qun-Yan; Ni, Yu-Qing; Liu, Le; Liu, You-Shuo published the artcile< LncRNA-ES3 inhibition by Bhlhe40 is involved in high glucose-induced calcification/senescence of vascular smooth muscle cells>, Category: pyridine-derivatives, the main research area is lncRNA Bhlhe40 glucose calcification senescence vascular smooth muscle cell; Bhlhe40; VSMC calcification/senescence; diabetes; lncRNA-ES3; microRNA; vascular aging.

Long noncoding RNAs (lncRNAs) have been investigated as novel regulatory mols. involved in diverse biol. processes. Our previous study demonstrated that lncRNA-ES3 is associated with the high glucose-induced calcification/senescence of human aortic vascular smooth muscle cells (HA-VSMCs). However, the mechanism of lncRNA-ES3 in vascular calcification/aging remained largely unknown. Here, we report that the expression of basic helix-loop-helix family member e40 (Bhlhe40) was decreased significantly in HA-VSMCs treated with high glucose, whereas the expression of basic leucine zipper transcription factor (BATF) was increased. Overexpression of Bhlhe40 and inhibition of BATF alleviated calcification/senescence of HA-VSMCs, as confirmed by Alizarin Red S staining and the presence of senescence-associated β-galactosidase-pos. cells. Moreover, we identified that Bhlhe40 regulates lncRNA-ES3 in HA-VSMCs by binding to the promoter region of the lncRNA-ES3 gene (LINC00458). Upregulation or inhibition of lncRNA-ES3 expression significantly promoted or reduced calcification/senescence of HA-VSMCs, resp. Addnl., we identified that lncRNA-ES3 functions in this process by suppressing the expression of miR-95-5p, miR-6776-5p, miR-3620-5p, and miR-4747-5p. The results demonstrate that lncRNA-ES3 triggers gene silencing of multiple miRNAs by binding to Bhlhe40, leading to calcification/senescence of VSMCs. Our findings suggest that pharmacol. interventions targeting lncRNA-ES3 may be therapeutically beneficial in ameliorating vascular calcification/aging.

Annals of the New York Academy of Sciences published new progress about Animal gene Role: BSU (Biological Study, Unclassified), PRP (Properties), BIOL (Biological Study) (CEBPE). 123-03-5 belongs to class pyridine-derivatives, and the molecular formula is C21H38ClN, Category: pyridine-derivatives.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Liu, Jian; Jian, Tianying; Guo, Liangqin; Atanasova, Tzvetomira; Nargund, Ravi P. published the artcile< Preparation of 3,4-fused-spiro[furan-5(5H),4'-piperidin]-2-one>, Related Products of 53636-56-9, the main research area is halo heteroaromatic Suzuki coupling iodolactonization dioxaborolanyl pyridine carboxylate; triflate heteroaromatic Suzuki coupling iodolactonization dioxaborolanyl pyridine carboxylate; fused spiro furanone piperidine preparation.

A general method for the preparation of various 3,4-fused-spiro[furan-5(5H),4′-piperidin]-2-ones with high yield was reported. The formation of spiro[furanone-piperidine] structure was achieved by a Suzuki coupling, followed by an iodolactonization reaction.

Tetrahedron Letters published new progress about Carboxylic esters Role: RCT (Reactant), RACT (Reactant or Reagent) (heteroaromatic). 53636-56-9 belongs to class pyridine-derivatives, and the molecular formula is C7H6BrNO2, Related Products of 53636-56-9.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Shiao, Min Jen; Shyu, Li Ming; Tarng, Kai Yih; Ma, Ying Tsun published the artcile< A convenient synthesis of halogenated 2-chloropyridines by transformation of halogenated 2-methoxypyridines under Vilsmeier-Haack conditions>, SDS of cas: 13472-84-9, the main research area is Vilsmeir halomethoxypyridine; chlorination halomethoxypyridine; chloropyridine.

The title compounds I (R = Cl; R1 = H, R2 = 3-Cl, 5-Cl, 6-Cl, 3-Br, 5-Br, 6-Br) were conveniently synthesized by reaction of 2-methoxypyridines I (R = OMe) under Vilsmeier-Haack conditions.

Synthetic Communications published new progress about Chlorination. 13472-84-9 belongs to class pyridine-derivatives, and the molecular formula is C6H6ClNO, SDS of cas: 13472-84-9.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem