Day: October 12, 2022

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

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

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

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

Jiang, Ze-Zhen; Gao, Ang; Li, Hao; Chen, Di; Ding, Chang-Hua; Xu, Bin; Hou, Xue-Long published the artcile< Enantioselective Synthesis of Chromenes via a Palladium-Catalyzed Asymmetric Redox-Relay Heck Reaction>, Recommanded Product: (S)-4-(tert-Butyl)-2-(5-(trifluoromethyl)pyridin-2-yl)-4,5-dihydrooxazole, the main research area is chromene enantioselective synthesis palladium catalyzed Heck redox relay; Heck reaction; asymmetric catalysis; boronic acids; chromenes; palladium.

A palladium-catalyzed asym. redox-relay Heck reaction of 4H-chromenes and arylboronic acids has been successfully developed. The reaction proceeded in moderate to good yields with good to high enantioselectivities. The resulting product is an advanced intermediate of bio-active compound BW683C.

Chemistry – An Asian Journal published new progress about Arylboronic acids Role: RCT (Reactant), RACT (Reactant or Reagent). 1416819-91-4 belongs to class pyridine-derivatives, and the molecular formula is C13H15F3N2O, Recommanded Product: (S)-4-(tert-Butyl)-2-(5-(trifluoromethyl)pyridin-2-yl)-4,5-dihydrooxazole.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Li, Yongtao; Luo, Xiaohe; Guo, Qingxiang; Nie, Yongwei; Wang, Tianqi; Zhang, Chao; Huang, Zhi; Wang, Xin; Liu, Yanhua; Chen, Yanan; Zheng, Jianyu; Yang, Shengyong; Fan, Yan; Xiang, Rong published the artcile< Discovery of N1-(4-((7-Cyclopentyl-6-(dimethylcarbamoyl)-7H-pyrrolo[2,3-d]pyrimidin-2-yl)amino)phenyl)-N8-hydroxyoctanediamide as a Novel Inhibitor Targeting Cyclin-dependent Kinase 4/9 (CDK4/9) and Histone Deacetylase 1 (HDAC1) against Malignant Cancer>, Product Details of C10H15N3O2, the main research area is pyrrolopyrimidine preparation CDK4 CDK9 HDAC1 inhibitor treatment malignant cancer.

A series of highly potent, selective inhibitors targeting both CDK4/9 and HDAC1 have been designed and synthesized. N1-(4-((7-Cyclopentyl-6-(dimethylcarbamoyl)-7H-pyrrolo[2,3-d]pyrimidin-2-yl)amino)phenyl)-N8-hydroxyoctanediamide (I) was discovered. The lead compound I with excellent CDK4/9 and HDAC1 inhibitory activity of IC50 = 8.8, 12, and 2.2 nM, resp., can effectively induce apoptosis of cancer cell lines. The kinase profiling of compound I showed excellent selectivity and specificity. Compound I induces G2/M arrest in high concentration and G0/G1 arrest in low concentration to prevent the proliferation and differentiation of cancer cells. Mice bared-breast cancer treated with I showed significant antitumor efficacy. The insight into mechanisms of I indicated that it could induce cancer cell death via cell apoptosis based on CDK4/9 and HDAC1 repression and phosphorylation of p53. The data demonstrated the compound I could be a promising drug candidate for cancer therapy.

Journal of Medicinal Chemistry published new progress about Antitumor agents. 220731-04-4 belongs to class pyridine-derivatives, and the molecular formula is C10H15N3O2, Product Details of C10H15N3O2.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Spock, Matthew; Carter, Trever R.; Bollinger, Katrina A.; Han, Changho; Baker, Logan A.; Rodriguez, Alice L.; Peng, Li; Dickerson, Jonathan W.; Qi, Aidong; Rook, Jerri M.; O’Neill, Jordan C.; Watson, Katherine J.; Chang, Sichen; Bridges, Thomas M.; Engers, Julie L.; Engers, Darren W.; Niswender, Colleen M.; Conn, P. Jeffrey; Lindsley, Craig W.; Bender, Aaron M. published the artcile< Discovery of VU6028418: A Highly Selective and Orally Bioavailable M4 Muscarinic Acetylcholine Receptor Antagonist>, Recommanded Product: 3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine, the main research area is preparation oral mAChR4 antagonist dystonia movement disorder.

Herein, we report the SAR leading to the discovery of VU6028418, a potent M4 mAChR antagonist with high subtype-selectivity and attractive DMPK properties in vitro and in vivo across multiple species. VU6028418 was subsequently evaluated as a preclin. candidate for the treatment of dystonia and other movement disorders. During the characterization of VU6028418, a novel use of deuterium incorporation as a means to modulate CYP inhibition was also discovered.

ACS Medicinal Chemistry Letters published new progress about Canis familiaris. 329214-79-1 belongs to class pyridine-derivatives, and the molecular formula is C11H16BNO2, Recommanded Product: 3-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Gargaro, Samantha L.; Klake, Raphael K.; Burns, Kevin L.; Elele, Sharon O.; Gentry, Skyler L.; Sieber, Joshua D. published the artcile< Access to a Catalytically Generated Umpolung Reagent through the Use of Cu-Catalyzed Reductive Coupling of Ketones and Allenes for the Synthesis of Chiral Vicinal Aminoalcohol Synthons>, Recommanded Product: 1-(Pyridin-3-yl)ethanone, the main research area is oxazolidinone homoallylic alc asym synthesis; ketone regioselective stereoselective reductive coupling oxazolidinyl allene copper catalyst.

Herein, a stereoselective method for the allylation of ketones R1C(O)R2 [R1 = Ph, 4-MeOC6H4, 2-naphthyl, 3-pyridyl, N-tosylpyrrol-3-yl, etc., R2 = Me; R1 = Ph, R2 = Et; R1R2 = 2-C6H4(CH2)3] with a chiral allenamide I is reported. By employing N-heterocyclic carbenes as ligands for the Cu catalyst, good branched selectivity can be obtained with high diastereocontrol. This methodol. allows access to a catalytically generated, polarity-reversed (umpolung) allyl nucleophile to enable the preparation of chiral 1,2-aminoalc. synthons II containing a dissonant functional group relationship.

Organic Letters published new progress about Allenes 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

Fuse, Hiromu; Nakao, Hiroyasu; Saga, Yutaka; Fukatsu, Arisa; Kondo, Mio; Masaoka, Shigeyuki; Mitsunuma, Harunobu; Kanai, Motomu published the artcile< Photocatalytic redox-neutral hydroxyalkylation of N-heteroaromatics with aldehydes>, Formula: C7H7NO, the main research area is hydroxy alkylated isoquinoline preparation; isoquinoline aldehyde hydroxyalkylation photocatalyst; alkylated hydroxy pyridine preparation; pyridine aldehyde hydroxyalkylation photocatalyst; quinoline hydroxy alkylated preparation; aldehyde quinoline hydroxyalkylation photocatalyst.

Hydroxyalkylation of N-heteroaromatics with aldehydes was achieved using a binary hybrid catalyst system comprising an acridinium photoredox catalyst and a thiophosphoric acid organocatalyst. This metal-free hybrid catalysis proceeded under mild conditions for a wide range of substrates, including quinolines, isoquinolines and pyridines as N-heteroaromatics and both aromatic and aliphatic aldehydes to afford hydroxy-alkylated quinolines I [R = H, 6-F, 7-Br, etc; R1 = Me, Ph, propan-1-ol; R2 = Cl, propan-1-ol], hydroxy-alkylated isoquinolines II [R4 = Et, Ph, 4-FC6H4, etc.] and hydroxy-alkylated pyridines III [R5 = H, Br, Ph; R6 = C(O)Me, CO2Me]. The reaction was applicable to late-stage derivatization of drugs and their leads.

Chemical Science published new progress about Aryl aldehydes Role: RCT (Reactant), RACT (Reactant or Reagent). 350-03-8 belongs to class pyridine-derivatives, and the molecular formula is C7H7NO, Formula: C7H7NO.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Tsuruoka, Ryoji; Yoshikawa, Naoki; Konishi, Takahiro; Yamano, Mitsuhisa published the artcile< Asymmetric Synthesis of a 5,6,7,8-Tetrahydro-1,6-naphthyridine Scaffold Leading to Potent Retinoid-Related Orphan Receptor γt Inverse Agonist TAK-828F>, SDS of cas: 777931-67-6, the main research area is enantioselective synthesis TAK 828F; Heck vinylation chloropyridine ethylene; naphthyridine synthesis vinylacylpyridine ammonia; ruthenium catalyzed enantioselective transfer hydrogenation; retinoid related orphan receptor gamma t inverse agonist synthesis.

An asym. synthesis of the tetrahydronaphthyridine scaffold of TAK-828F as a RORγt inverse agonist has been developed. The synthesis features a newly discovered atom-economical protocol for Heck-type vinylation of chloropyridine using ethylene gas, an unprecedented formation of dihydronaphthyridine directly from 2-vinyl-3-acylpyridine mediated by ammonia, and a ruthenium-catalyzed enantioselective transfer hydrogenation as key steps. This represents the first example of the enantioselective synthesis of a 5,6,7,8-tetrahydro-1,6-naphthyridine compound The new synthesis is also free of chromatog. or distillation purification processes and therefore qualifies for extension to large-scale manufacture

Journal of Organic Chemistry published new progress about Arylation. 777931-67-6 belongs to class pyridine-derivatives, and the molecular formula is C6H5BrClNO, SDS of cas: 777931-67-6.

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem