Category: pyridine-derivatives

In 2017,Wappes, Ethan A.; Nakafuku, Kohki M.; Nagib, David A. published 《Directed β C-H Amination of Alcohols via Radical Relay Chaperones》.Journal of the American Chemical Society published the findings.Recommanded Product: 103-74-2 The information in the text is summarized as follows:

A radical-mediated strategy for β C-H amination of alcs. has been developed. This approach employs a radical relay chaperone, which serves as a traceless director that facilitates selective C-H functionalization via 1,5-hydrogen atom transfer (HAT) and enables net incorporation of ammonia at the β carbon of alcs. The chaperones presented herein enable direct access to imidate radicals, allowing their first use for H atom abstraction. A streamlined protocol enables rapid conversion of alcs. to their β-amino analogs (via in situ conversion of alcs. to imidates, directed C-H amination, and hydrolysis to NH2). Mechanistic experiments indicate HAT is rate-limiting, whereas intramol. amination is product- and stereo-determining In addition to this study using 2-(2-Hydroxyethyl)pyridine, there are many other studies that have used 2-(2-Hydroxyethyl)pyridine(cas: 103-74-2Recommanded Product: 103-74-2) was used in this study.

2-(2-Hydroxyethyl)pyridine(cas: 103-74-2) belongs to pyridine. Pyridine is widely used in the precursor to agrochemicals and pharmaceuticals. Also, it is used as an important reagent and organic solvent.Recommanded Product: 103-74-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2016,Wang, Hongyue; Wang, Ze; Li, Shaoheng; Qiu, Yuntao; Liu, Bowen; Song, Zhiguang; Liu, Zhihui published 《Synthesis of novel thiazoline catalysts and their application in Michael addition reaction》.Chemical Research in Chinese Universities published the findings.Recommanded Product: 31106-82-8 The information in the text is summarized as follows:

Several novel chiral thiazoline catalysts containing thiazoline, thiourea and proline were efficiently synthesized from com. available L-cysteine. These ligands were subsequently applied to the asym. Michael reaction between cyclohexanone and various β-nitrostyrene. The result showed that the optimal catalyst for this reaction was 2-methylpyridine containing chiral thiazoline ligand , the organocatalyst with thiazoline, thiourea and chiral proline motif, which efficiently promoted the enantioselective conjugate addition of cyclohexanone to various nitroalkenes to yield the corresponding addition products in high to excellent yields with enantiomeric excess(e.e.) up to 95% and diastereoselectivity ratio(dr.) up to 99:1. The results came from multiple reactions, including the reaction of 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Recommanded Product: 31106-82-8)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) belongs to pyridine. Pyridines are often used as catalysts or reagents; particular notice has been paid recently to how pyridine coordinates to metal centers enabling a wide range of valuable reactions. Recommanded Product: 31106-82-8

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2015,Mane, Madhav S.; Gavade, Sandeep; Mane, Dhananjay V. published 《Designing and synthesis of N-(6-phenylpyridin-2-yl) pyridine-2-amine derivatives as a novel antimicrobial agent》.Journal of Environmental Nanotechnology published the findings.Recommanded Product: 5-Bromo-2-chloropyridine The information in the text is summarized as follows:

A new series of N-(-6-phenylpyridin-2-yl) pyridine-2-amine derivatives were synthesized in satisfactory yield, through simple and greener methodol. using 2-Amino, 6-Chloro, Pyridines as a starting material. Some of the newly prepared compounds demonstrate potent inhibitory activity against Gram pos. bacteria, Gram neg. bacteria and fungai. The results are discussed in terms of structure-activity relationships and an attempt was made to define the structural features required for activity. After reading the article, we found that the author used 5-Bromo-2-chloropyridine(cas: 53939-30-3Recommanded Product: 5-Bromo-2-chloropyridine)

5-Bromo-2-chloropyridine(cas: 53939-30-3) belongs to pyridine. Pyridine is very deactivated towards electrophilic substitution with respect to benzene. For this reason classical formylation, using methods such as the Gattermann or Vilsmeier reactions, are not generally successful. Recommanded Product: 5-Bromo-2-chloropyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2014,Lee, Hong Geun; Milner, Phillip J.; Buchwald, Stephen L. published 《Pd-Catalyzed Nucleophilic Fluorination of Aryl Bromides》.Journal of the American Chemical Society published the findings.Quality Control of Methyl 5-bromopicolinate The information in the text is summarized as follows:

On the basis of mechanism-driven reaction design, a Pd-catalyzed nucleophilic fluorination of aryl bromides and iodides has been developed. The method exhibits a broad substrate scope, especially with respect to nitrogen-containing heteroaryl bromides, and proceeds with minimal formation of the corresponding reduction products. A facilitated ligand modification process was shown to be critical to the success of the reaction. In the part of experimental materials, we found many familiar compounds, such as Methyl 5-bromopicolinate(cas: 29682-15-3Quality Control of Methyl 5-bromopicolinate)

Methyl 5-bromopicolinate(cas: 29682-15-3) 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.Quality Control of Methyl 5-bromopicolinate

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2014,Kedari, Chaitanya Kumar; Roy Choudhury, Nilanjana; Sharma, Sreevalli; Kaur, Parvinder; Guptha, Supreeth; Panda, Manoranjan; Mukerjee, Kakoli; Ramachandran, Vasanthi; Bandodkar, Balachandra; Ramachandran, Sreekanth; Tantry, Subramanyam J. published 《Biarylmethoxy Nicotinamides As Novel and Specific Inhibitors of Mycobacterium tuberculosis》.ACS Medicinal Chemistry Letters published the findings.Category: pyridine-derivatives The information in the text is summarized as follows:

A whole cell based screening effort on a focused library from corporate collection resulted in the identification of biarylmethoxy nicotinamides as novel inhibitors of M. tuberculosis (Mtu) H37Rv. The series exhibited tangible structure-activity relationships, and during hit to lead exploration, a cellular potency of 100 nM was achieved, which is an improvement of >200-fold from the starting point. The series is very specific to Mtu and noncytotoxic up to 250 μM as measured in the mammalian cell line THP-1 based cytotoxicity assay. This compound class retains its potency on several drug sensitive and single drug resistant clin. isolates, which indicate that the compounds could be acting through a novel mode of action. In the experimental materials used by the author, we found Methyl 5-bromopicolinate(cas: 29682-15-3Category: pyridine-derivatives)

Methyl 5-bromopicolinate(cas: 29682-15-3) 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.Category: pyridine-derivatives

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2014,Hager, Dominik; MacMillan, David W. C. published 《Activation of C-H Bonds via the Merger of Photoredox and Organocatalysis: A Coupling of Benzylic Ethers with Schiff Bases》.Journal of the American Chemical Society published the findings.Name: 6-Bromopyridin-3-amine The information in the text is summarized as follows:

The photoredox-mediated coupling of benzylic ethers with Schiff bases has been accomplished. Direct benzylic C-H activation by a combination of a thiol catalyst with an iridium photocatalyst and subsequent radical-radical coupling with secondary aldimines affords a variety of β-amino ether products in good to excellent yields. Mechanistic studies suggest that a reductive quenching pathway of the photocatalyst is operable.6-Bromopyridin-3-amine(cas: 13534-97-9Name: 6-Bromopyridin-3-amine) was used in this study.

6-Bromopyridin-3-amine(cas: 13534-97-9) belongs to anime. Primary amines having a tertiary alkyl group (R3CNH2) are difficult to prepare with most methods but are made industrially by the Ritter reaction. In this method a tertiary alcohol reacts with hydrogen cyanide (HCN) in the presence of a concentrated strong acid; a formamide, RNH―CHO, is formed first, which then undergoes hydrolysis.Name: 6-Bromopyridin-3-amine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2013,Zhang, Xiaoyan; Zhang, Nanjing; Chen, Guangming; Turpoff, Anthony; Ren, Hongyu; Takasugi, James; Morrill, Christie; Zhu, Jin; Li, Chunshi; Lennox, William; Paget, Steven; Liu, Yalei; Almstead, Neil; George Njoroge, F.; Gu, Zhengxian; Komatsu, Takashi; Clausen, Valerie; Espiritu, Christine; Graci, Jason; Colacino, Joseph; Lahser, Fred; Risher, Nicole; Weetall, Marla; Nomeir, Amin; Karp, Gary M. published 《Discovery of novel HCV inhibitors: Synthesis and biological activity of 6-(indol-2-yl)pyridine-3-sulfonamides targeting hepatitis C virus NS4B》.Bioorganic & Medicinal Chemistry Letters published the findings.Reference of 5-Bromo-2-chloropyridine The information in the text is summarized as follows:

A novel series of 6-(indol-2-yl)pyridine-3-sulfonamides I [R1 = CHF2O, c-Pr; R2 = i-Pr, H, CH(CH2F)2, etc.] was prepared and evaluated for their ability to inhibit HCV RNA replication in the HCV replicon cell culture assay. Preliminary optimization of this series furnished compounds with low nanomolar potency against the HCV genotype 1b replicon. Among these, compound I [R1 = CHF2O; R2 = CH(CH2F)2] was identified as a potent HCV replicon inhibitor (EC50 = 4 nM) with a selectivity index with respect to cellular GAPDH of more than 2500. Further, compound I [R1 = CHF2O; R2 = CH(CH2F)2] had a good pharmacokinetic profile in rats with an IV half-life of 6 h and oral bioavailability (F) of 62%. Selection of HCV replicon resistance identified an amino acid substitution in HCV NS4B that confers resistance to these compounds These compounds hold promise as a new chemotype with anti-HCV activity mediated through an underexploited viral target. The experimental part of the paper was very detailed, including the reaction process of 5-Bromo-2-chloropyridine(cas: 53939-30-3Reference of 5-Bromo-2-chloropyridine)

5-Bromo-2-chloropyridine(cas: 53939-30-3) belongs to pyridine. Pyridines form stable salts with strong acids. Pyridine itself is often used to neutralize acid formed in a reaction and as a basic solvent. Reference of 5-Bromo-2-chloropyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Computed Properties of C7H6BrNO2On November 6, 2013 ,《Picomolar Inhibitors of HIV Reverse Transcriptase Featuring Bicyclic Replacement of a Cyanovinylphenyl Group》 appeared in Journal of the American Chemical Society. The author of the article were Lee, Won-Gil; Gallardo-Macias, Ricardo; Frey, Kathleen M.; Spasov, Krasimir A.; Bollini, Mariela; Anderson, Karen S.; Jorgensen, William L.. The article conveys some information:

Members of the catechol diether class are highly potent non-nucleoside inhibitors of HIV-1 reverse transcriptase (NNRTIs). The most active compounds yield EC50 values below 0.5 nM in assays using human T-cells infected by wild-type HIV-1. However, these compounds such as rilpivirine, the most recently FDA-approved NNRTI, bear a cyanovinylphenyl (CVP) group. This is an uncommon substructure in drugs that gives reactivity concerns. In the present work, computer simulations were used to design bicyclic replacements for the CVP group. The predicted viability of a 2-cyanoindolizinyl alternative was confirmed exptl. and provided compounds with 0.4 nM activity against the wild-type virus. The compounds also performed well with EC50 values of 10 nM against the challenging HIV-1 variant that contains the Lys103Asn/Tyr181Cys double mutation in the RT enzyme. Indolyl and benzofuranyl analogs were also investigated; the most potent compounds in these cases have EC50 values toward wild-type HIV-1 near 10 nM and high-nanomolar activities toward the double-variant. The structural expectations from the modeling were much enhanced by obtaining an X-ray crystal structure at 2.88 Å resolution for the complex of the parent 2-cyanoindolizine I and HIV-1 RT. The aqueous solubilities of the most potent indolizine analogs were also measured to be ∼40 μg/mL, which is similar to that for the approved drug efavirenz and ∼1000-fold greater than for rilpivirine. In the experiment, the researchers used 3-Bromo-5-methylpicolinic acid(cas: 1211515-68-2Computed Properties of C7H6BrNO2)

3-Bromo-5-methylpicolinic acid(cas: 1211515-68-2) belongs to pyridine. Pyridine, its benzo and pyridine-based compounds play diverse roles in organic chemistry. As ligands, solvents, and catalysts they facilitate reactions; thus descriptions of these new ligands and their applications abound each year.Computed Properties of C7H6BrNO2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《The Effect of the Leaving Group in N-Heterocyclic Carbene-Catalyzed Nucleophilic Aromatic Substitution Reactions》 was published in Bulletin of the Chemical Society of Japan in 2020. These research results belong to Yasui, Kosuke; Kamitani, Miharu; Fujimoto, Hayato; Tobisu, Mamoru. Application In Synthesis of 2-Bromopyridin-3-amine The article mentions the following:

The reactivity order of the leaving group was F > Cl ≥ Br > I in N-heterocyclic carbene-catalyzed CSNAr reactions of aryl halides bearing an α,β-unsaturated amide was discussed. Based on a qual. Marcus anal., the nature of the transition state in this catalytic CSNAr was primarily determined by the potential energy of the Meisenheimer complex, even though it was not involved as a discrete intermediate in the reaction pathway. The results came from multiple reactions, including the reaction of 2-Bromopyridin-3-amine(cas: 39856-58-1Application In Synthesis of 2-Bromopyridin-3-amine)

2-Bromopyridin-3-amine(cas: 39856-58-1) belongs to anime. Amine, any member of a family of nitrogen-containing organic compounds that is derived, either in principle or in practice, from ammonia (NH3). Naturally occurring amines include the alkaloids, which are present in certain plants; the catecholamine neurotransmitters (i.e., dopamine, epinephrine, and norepinephrine); and a local chemical mediator, histamine, that occurs in most animal tissues.Application In Synthesis of 2-Bromopyridin-3-amine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

《Syntheses with aromatic nitramines. Part VIII. Rearrangements of isomeric nitraminopyridines with aroyl chlorides》 was published in Universitatis Iagellonicae Acta Chimica in 1991. These research results belong to Sepiol, Jadwiga; Tomasik, Piotr. Recommanded Product: 5-Chloro-3-methylpyridin-2-ol The article mentions the following:

2-Nitraminopyridine reacts with BzCl to give 5-chloro-1H-pyridin-2-one. 4-Nitraminopyridine with the same reagent produces both 3-chloro-1H-pyridin-4-one and unsubstituted 1H-pyridin-4-one, and 3-nitraminopyridine gives solely 3-hydroxypyridine. Any substituent in the 5-position of 2-nitraminopyridine or an electron-withdrawing substituent in the 3-position of that nitramine prohibit chlorination in the β-position. The reaction is accelerated by electron-donating substituents in the acyl moiety and (4-MeOC6H4COCl) and slowed down by electron-withdrawing substituents, e.g. 4-O2NC6H4COCl. In the experiment, the researchers used 5-Chloro-3-methylpyridin-2-ol(cas: 58498-61-6Recommanded Product: 5-Chloro-3-methylpyridin-2-ol)

5-Chloro-3-methylpyridin-2-ol(cas: 58498-61-6) belongs to pyridine. Pyridine-based materials are valued for their optical and physical properties as well as their medical potential. Additionally, pyridine-based natural products continue to be discovered and studied for their properties and to understand their biosynthesis.Recommanded Product: 5-Chloro-3-methylpyridin-2-ol

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem