Category: pyridine-derivatives

Application In Synthesis of Picolinic acidIn 2020 ,《Ilex paraguariensis, white mulberry and chromium picolinate in patients with pre-diabetes》 appeared in Phytotherapy Research. The author of the article were Derosa, Giuseppe; D’Angelo, Angela; Maffioli, Pamela. The article conveys some information:

To evaluate if a nutraceutical compound containing Ilex paraguariensis, White Mulberry and Chromium Picolinate can ameliorate glycemic status in patients with pre-diabetes. We enrolled patients with IFG or IGT, not taking other hypoglycemic compounds Patients were randomized to take placebo or the nutraceutical compound for 3 mo, in a randomized, double-blind, placebo-controlled design. Both treatments were self-administered once a day, 1 tablet during the breakfast. A reduction of FPG was observed with the nutraceutical combination (-7.8%). Furthermore, there was a decrease of HOMA-IR with the nutraceutical combination (-7.9%). M value was higher (p < 0.05 vs baseline and p < 0.05 vs placebo) at the end of the treatment. We obtained a reduction of Tg with the nutraceutical combination (-8.3%). About 16.6% of patients treated with nutraceutical returned to have a normal glycemia (< 100 mg/dL), and all patients had an improvement of insulin-resistance, in particular 67% of patients returned to have a M value inside range of normal insulin sensitivity. A nutraceutical containing Ilex paraguariensis, White Mulberry and Chromium Picolinate at 500 mg can be helpful in improving glycemia and Tg value, in patients with pre-diabetes. The experimental part of the paper was very detailed, including the reaction process of Picolinic acid(cas: 98-98-6Application In Synthesis of Picolinic acid)

Picolinic acid(cas: 98-98-6) is used as a chelate for alkaline earth metals. Used to prepare picolinato ligated transition metal complexes. In synthetic organic chemistry, has been used as a substrate in the Mitsunobu reaction and in the Hammick reaction.Application In Synthesis of Picolinic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Jin, Yaping; Wang, Ting; Che, Xuefu; Dong, Jianhao; Li, Qingfeng; Yang, Jingshuai published an article in Journal of Power Sources. The title of the article was 《Poly(arylene pyridine)s: New alternative materials for high temperature polymer electrolyte fuel cells》.Synthetic Route of C7H7NO The author mentioned the following in the article:

Developing high-performance and low-cost high temperature polymer exchange membranes (HT-PEMs) is a huge challenge to fuel cells. Here, two poly(arylene pyridine)s (PTAP and PBAP) are synthesized through a simple one-step Friedel-Crafts polymerization of 4-acetylpyridine and para-terphenyl/biphenyl. Both PTAP and PBAP exhibit superior organic solubility and excellent thermal stability. Owing to pyridine groups, PBAP and PTAP membranes display excellent phosphoric acid (PA) absorption capability. The PTAP membrane achieves a PA uptake of 220% after immersing in 85 wt% PA solution at 100 °C, and a high conductivity of 0.102 S cm-1 at 180 °C. Specially, PBAP and PTAP also possess remarkable chem. stability. After 450 h Fenton test, the PTAP membrane still exhibits a high PA uptake of 200% and high conductivity of 0.086 S cm-1. A single H2-O2 cell based on the PTAP/220% membrane shows a peak power d. of 743 mW cm-2 at 180 °C without any back pressure, which also displays excellent durability under 200 mA cm-2 and 400 mA cm-2 at 160 °C. Thus, this work develops a facile, cost effective and up-scalable synthetic route of alternative HT-PEM under mild conditions, comparing with the state-of-the-art polybenzimidazole (PBI) membrane.4-Acetylpyridine(cas: 1122-54-9Synthetic Route of C7H7NO) was used in this study.

4-Acetylpyridine(cas: 1122-54-9) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. Synthetic Route of C7H7NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Xing, Hao; Yu, Ying; Liu, Junkai; Qin, Peng; Lam, Jacky Wing Yip; Shi, Bingbing; Xie, Guohua; Tang, Ben Zhong published an article in Advanced Optical Materials. The title of the article was 《A Discrete Platinum(II) Metallacycle Harvesting Triplet Excitons for Solution-Processed Deep-Red Organic Light-Emitting Diodes》.Safety of 4-Ethynylpyridine The author mentioned the following in the article:

Platinum(II) coordination-driven architectures have exhibited unique features in fabricating functional supramol. materials. By introducing luminescent moieties into the ligand structure, various light-emitting metallacycles and metallacages have been facilely prepared, presenting specific applications in chem. sensing, light-harvesting, and bio-imaging. Except for building up the metal-ligand bonds, the platinum(II) center should also benefit the ultimate luminescence due to its unique photophys. traits. Here, a platinum(II) metallacycle with deep-red emission for solution-processed organic light-emitting diodes is reported. This metallacycle is assembled by mixing a 180° di-Pt(II) acceptor with a pyridyl-decorated ligand functionalized by a deep-red fluorescent emitter. Notably, the platinum(II) acceptor permits the efficient intramol. transfer of all elec. generated singlet and triplet excitons from itself to the fluorescent moiety, which dramatically enhances the external quantum efficiency of the device compared with the one consisting of the sole ligand. The present results reveal the function of platinum(II) metallacycles in light-emitting devices, a finding which should apply to other coordination-driven architectures with versatile properties. The experimental process involved the reaction of 4-Ethynylpyridine(cas: 2510-22-7Safety of 4-Ethynylpyridine)

4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. Safety of 4-Ethynylpyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Arbour, Christine A.; Imperiali, Barbara published an article in Organic Letters. The title of the article was 《Backbone-anchoring, solid-phase synthesis strategy to access a library of peptidouridine-containing small molecules》.HPLC of Formula: 2510-22-7 The author mentioned the following in the article:

Nucleoside diphosphate sugar (NDP-sugar) substrates provide the inspiration for nucleoside analog inhibitor scaffolds. By employing solid-phase synthesis, we provide a method to access a library of peptidouridine inhibitors with both minimal compound handling and purification steps. Specifically, this strategy is exemplified by generating uridine diphosphate sugar (UDP-sugar) mimics, which allow for compound elaboration by altering the dipeptide composition, the N-terminal linkage, and a pendant aryl group. To exemplify the versatility, 41 unique nucleoside analogs are presented. The experimental process involved the reaction of 4-Ethynylpyridine(cas: 2510-22-7HPLC of Formula: 2510-22-7)

4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. HPLC of Formula: 2510-22-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Wolinska, Ewa; Rozbicki, Przemyslaw; Branowska, Danuta published an article in Monatshefte fuer Chemie. The title of the article was 《Chiral pyridine oxazoline and 1,2,4-triazine oxazoline ligands incorporating electron-withdrawing substituents and their application in the Cu-catalyzed enantioselective nitroaldol reaction》.Formula: C5H3Br2N The author mentioned the following in the article:

Eight pyridine-containing and four 1,2,4-triazine-containing chiral oxazoline ligands incorporating electron-withdrawing substituents have been oxazolines I (R1 = Ph, t-Bu; R2 = H, F; R3 = H, Cl; R4 = H, F, Cl, nitro; R5 = H, Br), II and III synthesized by two-step route including Buchwald-Hartwig amination. Enantio-inducing activity of the ligands has been assessed in the copper-catalyzed asym. nitroaldol reactions and the influence of the electron-withdrawing substituents on the ligands’ activity has been investigated. In the experiment, the researchers used 2,6-Dibromopyridine(cas: 626-05-1Formula: C5H3Br2N)

2,6-Dibromopyridine(cas: 626-05-1) belongs to pyridine. When pyridine is adsorbed on oxide surfaces or in porous materials, the following species are commonly observed: (i) pyridine coordinated to Lewis acid sites, (ii) pyridine H-bonded to weakly acidic hydroxyls, and (iii) protonated pyridine. At high coverage, physisorbed pyridine and protonated dimers can also be observed.Formula: C5H3Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Wu, Gaorong; Xu, Xiaobo; Wang, Shuai; Chen, Lu; Pang, Binghan; Ma, Tao; Ji, Yafei published an article in Chinese Chemical Letters. The title of the article was 《Metal-free directed C-H borylation of 2-(N-methylanilino)-5-fluoropyridines and 2-benzyl-5-fluoropyridines》.Recommanded Product: 2-Bromo-5-methylpyridine The author mentioned the following in the article:

A novel method for metal-free C-H pyridine-directed borylation of 2-(N-methylanilino)-5-fluoropyridines and 2-benzyl-5-fluoropyridines with BBr3 has been reported, affording complexes R1C6H3(Bpin)-2-XR2-5-FC5H4N-2 (X = N, CH; R1 = H, alkyl, halo; R2 = H, Me). The 5-fluoropyridine directed borylation reaction exhibited high efficiency and site exclusivity. The useful protocol could be executed on a gram-scale easily and the borylated products showed good derivatization applications. Moreover, the practicality of the strategy was expanded by the fact that the directing group could be removed in an acceptable yield. The experimental part of the paper was very detailed, including the reaction process of 2-Bromo-5-methylpyridine(cas: 3510-66-5Recommanded Product: 2-Bromo-5-methylpyridine)

2-Bromo-5-methylpyridine(cas: 3510-66-5) belongs to pyridine. Pyridine’s structure is isoelectronic with that of benzene, but its properties are quite different. Pyridine is completely miscible with water, whereas benzene is only slightly soluble. Like all hydrocarbons, benzene is neutral (in the acid–base sense), but because of its nitrogen atom, pyridine is a weak base.Recommanded Product: 2-Bromo-5-methylpyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Liu, Hao; Chi, Wei; Lin, Meng-Ling; Dong, Lin published an article in Organic Chemistry Frontiers. The title of the article was 《Iridium(III)-catalyzed two-fold C-H alkylation of BINOLs with allyl alcohols》.Synthetic Route of C6H6BrN The author mentioned the following in the article:

Ir(III)-Catalyzed C-H alkylation of BINOL units I (R1 = H, Me, MeO, Br; R2 = H, Me, Ph, etc.; R3 = pyridin-2-yl, 3-methoxypyridin-2-yl, thiazol-2-yl, etc.; R4 = Me, pyridin-2-yl, 3-methoxypyridin-2-yl, etc.) has been well examined by using allyl alcs. CH2=CHCH(R5)OH (R5 = Et, benzyl, thiophen-2-yl, etc.) as coupling partners. Under the advantage of the pyridine guiding group, the efficient protocol allows the rapid synthesis of diverse BINOL carbonyl compounds II and III with the retention of optical purity. In addition to this study using 2-Bromo-5-methylpyridine, there are many other studies that have used 2-Bromo-5-methylpyridine(cas: 3510-66-5Synthetic Route of C6H6BrN) was used in this study.

2-Bromo-5-methylpyridine(cas: 3510-66-5) belongs to pyridine. Pyridine’s structure is isoelectronic with that of benzene, but its properties are quite different. Pyridine is completely miscible with water, whereas benzene is only slightly soluble. Like all hydrocarbons, benzene is neutral (in the acid–base sense), but because of its nitrogen atom, pyridine is a weak base.Synthetic Route of C6H6BrN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Theeramunkong, Sewan; Maicheen, Chirattikan; Krongsil, Rinnara; Chaichanasap, Waritsara; Asasutjarit, Rathapon; Vajragupta, Opa published an article in 2022. The article was titled 《Synthesis and in vitro biological evaluation of (iso)quinoline-1,2,3-triazole derivatives as anticancer agents》, and you may find the article in Chemical Papers.Electric Literature of C7H5N The information in the text is summarized as follows:

Two series of triazole derivatives I [Ar = 1-naphthyl, pyridin-3-yl, isoquinolin-4-yl, etc.; R = 2-methoxyphenyl, 4-tert-butylphenyl, 2-cyanophenyl, etc.] were designed and synthesized as potential anticancer agents. A series of eighteen novel 1,2,3-triazole derivatives I were synthesized through copper catalyzed click reaction. The compounds were evaluated for their cytotoxicity activity against HepG2, HeLa cell and HEK293 cell lines using MTT assay. The results showed that compounds [Ar = 4-isoquinolyl; R = 2-methoxyphenyl, 3-cyanophenyl] were the most potent compounds against HepG2 cell with IC50 values 9.6 and 13.3μM, resp. Addnl., the compounds I [Ar = 4-isoquinolyl; R = 2-methoxyphenyl, 3-cyanophenyl] were the most potent compounds against HeLa cell with IC50 values 5.7 and 5.8μM, resp. The results of tubulin polymerization assay demonstrated that lead compound I [Ar = 4-isoquinolyl; R = tert-butyl] and compound I [Ar = 4-isoquinolyl; R = 2-methoxyphenyl] could inhibit in vitro tubulin polymerization In addition, a mechanism study displayed that I [Ar = 4-isoquinolyl; R = 2-methoxyphenyl] blocked cell cycle arrest at G2/M phase. Furthermore, a mol. docking study demonstrated that I [Ar = 4-isoquinolyl; R = 2-methoxyphenyl] could bind to the colchicine site of tubulin and form hydrogen bonds in the active site of β-tubulin. In summary, this study recommended a promising isoquinoline-triazole scaffold for further development as more efficient microtubule polymerization inhibitors in the field of cancer treatment.4-Ethynylpyridine(cas: 2510-22-7Electric Literature of C7H5N) was used in this study.

4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. In industry and in the lab, pyridine is used as a reaction solvent, particularly when its basicity is useful, and as a starting material for synthesizing some herbicides, fungicides, and antiseptics.Electric Literature of C7H5N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Mandal, Vivekananda; Ghosh, Narendra Nath; Mitra, Prashanta Kumar; Mandal, Sukhendu; Mandal, Vivekananda published an article in 2022. The article was titled 《Production and characterization of a broad-spectrum antimicrobial 5-butyl-2-pyridine carboxylic acid from Aspergillus fumigatus nHF-01》, and you may find the article in Scientific Reports.Reference of Picolinic acid The information in the text is summarized as follows:

Abstract: The present study aims at the production optimization, purification, and characterization of a potent broad-spectrum antimicrobial compound (AMC) produced by Aspergillus fumigatus nHF-01 (GenBank Ac. Number MN190286). The culture conditions were optimized for a higher amount of AMC. The AMC was solvent extracted and characterized by UV-Vis, FT-IR, ESI-MS, and 1H-NMR spectroscopy. The MIC, MBC and mode of action were determined against a set of Gram-pos. and Gram-neg. human pathogenic bacteria. Its antibiofilm, synergistic and cytotoxic effects were also tested. The putative target site of action was evaluated through in silico mol. docking study. The stain A. fumigatus nHF-01 produced the maximum AMC (5-butyl-2-pyridine carboxylic acid) in 2% MEB (w/v) and 4% YE (w/v) at pH 6.0 and 20 °C temperature with 100 rpm agitation for ten days. It caused complete lethality of the Gram-pos. and Gram-neg. human pathogenic bacteria at a 129 μg/mL dose by rupture and entire dissolution of cell integrity. It showed moderate antibiofilm activity and had a synergistic activity with streptomycin and additive effects with ciprofloxacin and vancomycin. It targets a respiratory enzyme, Quinol-Fumarate Reductase (1l0v), with the highest binding affinities. It had cytotoxicity against human lung carcinoma A549 cell line and was stable up to 100 °C. Thus, the study revealed that the strain A. fumigatus nHF-01 produces a potent broad-spectrum AMC 5-butyl-2-pyridine carboxylic acid that could be used against human food and topical pathogenic bacteria. This is the first report of such a compound produced from the A. fumigatus. In the experiment, the researchers used many compounds, for example, Picolinic acid(cas: 98-98-6Reference of Picolinic acid)

Picolinic acid(cas: 98-98-6) is used in the preparation of 2-Aminodihydro[1,3]thiazines as BACE 2 inhibitors and their preparation and use in the treatment of diabetes.Reference of Picolinic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Guo, Zhewen; Zhao, Jun; Liu, Yuhang; Li, Guangfeng; Wang, Heng; Hou, Yali; Zhang, Mingming; Li, Xiaopeng; Yan, Xuzhou published an article in 2021. The article was titled 《Conformational effect on fluorescence emission of tetraphenylethylene-based metallacycles》, and you may find the article in Chinese Chemical Letters.Application In Synthesis of Pyridin-3-ylboronic acid The information in the text is summarized as follows:

Herein, the authors designed and constructed two metallacycles, 1 and 2, to illustrate the conformational effect of isomeric AIE fluorophores on the platform of supramol. coordination complexes (SCCs). Specifically, the dangling Ph rings in TPE units of the metallacycle 1 align completely outside the main cyclic structure, while in the metallacycle 2, these Ph rings align half inside and half outside. The exptl. results showed that two metallacycles exhibited different behaviors in terms of AIE fluorescence and chem. sensing, which could be attributed to the subtle structural difference of the TPE units. This work represents the unification of topics such as self-assembly, AIE, and chem. sensing, and further promotes the understanding for the structure-property relationship of isomeric AIE fluorophores.Pyridin-3-ylboronic acid(cas: 1692-25-7Application In Synthesis of Pyridin-3-ylboronic acid) was used in this study.

Pyridin-3-ylboronic acid(cas: 1692-25-7) belongs to pyridine. Pyridine derivatives lend themselves to many roles in the spirited field of supramolecular chemistry – whether as the ligand backbone of metal-organic polymers or presiding over the key electronic stations of nanodevices. In biochemistry, pyridine-containing cofactors are necessary nutrients on which our lives depend. Application In Synthesis of Pyridin-3-ylboronic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem