Pyridine-derivatives

Arnold, Eric P.; Mondal, Prolay K.; Schmitt, Daniel C. published an article on January 13 ,2020. The article was titled 《Oxidative Cyclization Approach to Benzimidazole Libraries》, and you may find the article in ACS Combinatorial Science.Reference of 4-Amino-2-picoline The information in the text is summarized as follows:

An efficient approach to the parallel synthesis of benzimidazoles from anilines is described. Library approaches to vary the N1 and C2 vectors of benzimidazoles are well established; however, C4-C7 variation has traditionally relied on 1,2-dianiline building blocks, providing limited chem. space coverage. We have developed an amidine formation/oxidative cyclization sequence that enables anilines as a diversity set for benzimidazole C4-C7 SAR generation in parallel format. The amidine annulation was achieved using PIDA or Cu-mediated oxidation to access both N-H and N-alkyl benzimidazoles. This library protocol has now been utilized for analog production in four medicinal chem. projects. Addnl., the synthesis of aza-benzimidazoles from aminopyridines was achieved via an analogous sequence. After reading the article, we found that the author used 4-Amino-2-picoline(cas: 18437-58-6Reference of 4-Amino-2-picoline)

4-Amino-2-picoline(cas: 18437-58-6) belongs to anime. Reaction with nitrous acid (HNO2), which functions as an acylating agent that is a source of the nitrosyl group (―NO), converts aliphatic primary amines to nitrogen and mixtures of alkenes and alcohols corresponding to the alkyl group in a complex process. This reaction has been used for analytical determination of primary amino groups in a procedure known as the Van Slyke method.Reference of 4-Amino-2-picoline

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2015,Jornet-Molla, Veronica; Romero, Francisco M. published 《Synthesis of rigid ethynyl-bridged polytopic picolinate ligands for MOF applications》.Tetrahedron Letters published the findings.Safety of Methyl 5-bromopicolinate The information in the text is summarized as follows:

Segmented homopolytopic ligands that consist of a rigid central arylene platform, ethynylene spacers, and terminal chelating picolinate subunits have been synthesized in good yields in a two-step procedure involving a Sonogashira-type cross coupling reaction between the ester Me 5-bromopyridine-2-carboxylate and several arylacetylenes, followed by hydrolysis of the resulting Me picolinates [e.g., Me 5-bromopyridine-2-carboxylate + 1,4-diethynylbenzene followed by hydrolysis afforded ligand I]. A similar strategy has been employed for the preparation of heteroditopic ligands containing picolinate and a second non-chelating pyridine or benzoate unit. The compounds are potential candidates for organic linkers in metal-organic frameworks (MOFs). The results came from multiple reactions, including the reaction of Methyl 5-bromopicolinate(cas: 29682-15-3Safety of Methyl 5-bromopicolinate)

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

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2016,McKinney, David C.; Eyermann, Charles J.; Gu, Rong-Fang; Hu, Jun; Kazmirski, Steven L.; Lahiri, Sushmita D.; McKenzie, Andrew R.; Shapiro, Adam B.; Breault, Gloria published 《Antibacterial FabH Inhibitors with Mode of Action Validated in Haemophilus influenzae by in Vitro Resistance Mutation Mapping》.ACS Infectious Diseases published the findings.Synthetic Route of C5H3BrClN The information in the text is summarized as follows:

Fatty acid biosynthesis is essential to bacterial growth in Gram-neg. pathogens. Several small mols. identified through a combination of high-throughput and fragment screening were cocrystd. with FabH (β-ketoacyl-acyl carrier protein synthase III) from Escherichia coli and Streptococcus pneumoniae. Structure-based drug design was used to merge several scaffolds to provide a new class of inhibitors. After optimization for Gram-neg. enzyme inhibitory potency, several compounds demonstrated antimicrobial activity against an efflux-neg. strain of Haemophilus influenzae. Mutants resistant to these compounds had mutations in the FabH gene near the catalytic triad, validating FabH as a target for antimicrobial drug discovery.5-Bromo-2-chloropyridine(cas: 53939-30-3Synthetic Route of C5H3BrClN) was used in this study.

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. Synthetic Route of C5H3BrClN

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2017,Ma, Xiantao; Yu, Lei; Su, Chenliang; Yang, Yaqi; Li, Huan; Xu, Qing published 《Efficient Generation of C-S Bonds via a By-Product-Promoted Selective Coupling of Alcohols, Organic Halides, and Thiourea》.Advanced Synthesis & Catalysis published the findings.Recommanded Product: 53939-30-3 The information in the text is summarized as follows:

A metal- and base-free three-component coupling of alcs., heteroaryl halides, and thiourea has been developed for direct and selective synthesis of heteroaryl thioethers. This method can be easily scaled up to the gram scale and extended to dialkyl thioethers, heteroaryl selenides, benzothiazoles, and some antimycobacterially-active thioethers. Mechanistic studies revealed that a byproduct-promoted in situ C-O activation of alcs. to more reactive alkyl halides and slow release of the thiol and alkyl halide intermediates are the key to the high selectivity and success of the reaction. The results came from multiple reactions, including the reaction of 5-Bromo-2-chloropyridine(cas: 53939-30-3Recommanded Product: 53939-30-3)

5-Bromo-2-chloropyridine(cas: 53939-30-3) 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: 53939-30-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2017,Yasue, Risa; Miyauchi, Masaru; Yoshida, Kazuhiro published 《Planar Chiral Cyclic (Amino)(ferrocenyl)carbene as Ligand for Transition Metals》.Advanced Synthesis & Catalysis published the findings.Reference of 2-(Bromomethyl)pyridine hydrobromide The information in the text is summarized as follows:

Planar chiral ferrocene-fused iminium salts were synthesized in enantiomerically pure form. The novel planar chiral cyclic (amino)(ferrocenyl)carbene successfully generated from such salt was subjected to carbene trapping experiments with sulfur and copper chloride. The utility of the carbene as a chiral ligand for transition metals was preliminarily demonstrated in the copper-catalyzed enantioselective β-boration of an α,β-unsaturated ester. After reading the article, we found that the author used 2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8Reference of 2-(Bromomethyl)pyridine hydrobromide)

2-(Bromomethyl)pyridine hydrobromide(cas: 31106-82-8) 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. Reference of 2-(Bromomethyl)pyridine hydrobromide

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,Bioorganic Chemistry included an article by Benchekroun, Mohamed; Pachon-Angona, Irene; Luzet, Vincent; Martin, Helene; Oset-Gasque, Maria-Jesus; Marco-Contelles, Jose; Ismaili, Lhassane. SDS of cas: 128071-75-0. The article was titled 《Synthesis, antioxidant and Aβ anti-aggregation properties of new ferulic, caffeic and lipoic acid derivatives obtained by the Ugi four-component reaction》. The information in the text is summarized as follows:

We report herein the synthesis antioxidant and Aβ anti-aggregation capacity of (E)-N-benzyl-N-[2-(benzylamino)-2-oxoethyl]-3-(aryl)acrylamides and related (R)-N-benzyl-N-(2-(benzylamino)-2-oxoethyl)-5-(1,2-dithiolan-3-yl)pentanamides 1-12. These compounds have been obtained, via Ugi four-component reaction, from modest to good yields. Their antioxidant anal., using the DPPH and ORAC assays, allowed us to identify compounds 8 and 9, as potent antioxidant agents, showing also strong Aβ1-40 self-aggregation inhibition, two biol. properties of interest in pathologies linked to the oxidative stress, such as Alzheimer’s disease. In the experimental materials used by the author, we found 2-Bromonicotinaldehyde(cas: 128071-75-0SDS of cas: 128071-75-0)

2-Bromonicotinaldehyde(cas: 128071-75-0) 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.SDS of cas: 128071-75-0

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,ACS Applied Materials & Interfaces included an article by Yu, Ziwei; Zhang, Jiaxin; Liu, Shihao; Zhang, Letian; Zhao, Yi; Zhao, Hongyu; Xie, Wenfa. Electric Literature of C5H3Br2N. The article was titled 《High-Efficiency Blue Phosphorescent Organic Light-Emitting Devices with Low Efficiency Roll-Off at Ultrahigh Luminance by the Reduction of Triplet-Polaron Quenching》. The information in the text is summarized as follows:

High-performance phosphorescent organic light-emitting devices (PhOLEDs) at high luminance are still a remaining problem that needs to be solved, especially blue PhOLEDs. (5-(5-9H-Carbazol-9-yl)pyridin-2-yl)-8-(9H-carbazol-9-yl)-5H-pyrido[3,2-b]indole (p2PCB2CZ) with excellent characteristics as a host is designed to realize a novel host-guest system without hole trapping effect in blue PhOLEDs. The device in which p2PCB2CZ and FIrpic is used as host and guest, resp., is proposed to improve the performances of blue PhOLEDs at high luminance, especially at ultrahigh luminance (>30000 cd/m2). The maximum external quantum efficiency (EQE) of this type of blue PhOLEDs is 19.2%, while the maximum EQE of the reference blue PhOLEDs is 18.7%. Nevertheless, the p2PCB2CZ-based devices exhibit significant advantages at high luminance, because its EQE still attains to 10.8% even when the luminance increases to 30000 cd/m2, which is 1.67 times that of the reference device. From measurements based on steady-state and time-resolved spectroscopies, the reduction of triplet-polaron quenching in p2PCB2CZ-based devices is the main reason for improving the performances of blue PhOLEDs at high luminance. In the experimental materials used by the author, we found 2,5-Dibromopyridine(cas: 624-28-2Electric Literature of C5H3Br2N)

2,5-Dibromopyridine(cas: 624-28-2) 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.Electric Literature of C5H3Br2N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2019,Journal of Organic Chemistry included an article by Zhang, Yu-Fang; Duan, Wen-Di; Chen, Jingjing; Hu, Youhong. Safety of 4-Ethynylpyridine. The article was titled 《Base-Promoted Cascade Reactions of 3-(1-Alkynyl)chromones with Pyridinium Ylides to Chromeno[2,3-d]azepine Derivatives》. The information in the text is summarized as follows:

A base-promoted cascade reaction of 3-(1-alkynyl)chromones with pyridinium ylides has been developed to afford a novel chromeno[2,3-d]azepine scaffold in an efficient and economic manner. This tandem process involves multiple reactions including a Michael addition/deprotonation/alkyne-allene isomerization/cyclization and the subsequent 1,2-addition under mild conditions without a transition metal catalyst. In the part of experimental materials, we found many familiar compounds, such as 4-Ethynylpyridine(cas: 2510-22-7Safety of 4-Ethynylpyridine)

4-Ethynylpyridine(cas: 2510-22-7) 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. Safety of 4-Ethynylpyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Synthesis of Functionalized Spirocyclic Indolines by Visible Light-Induced One-Pot Sequential Difluoromethylative Dearomatization, Hydroxylation, and Substitution Reactions》 were Wang, Qiang; Qu, Yi; Liu, Yuxiu; Song, Haibin; Wang, Qingmin. And the article was published in Advanced Synthesis & Catalysis in 2019. Name: fac-Tris(2-phenylpyridine)iridium The author mentioned the following in the article:

Herein an one-pot protocol for visible light-induced synthesis of functionalized spirocyclic indolines I [R = P(O)Ph2, 2-pyrrolyl, 3-indolyl, etc.; R1 = H, 5-F, 6-Me, etc.] was described under mild conditions by means of a process involving sequential difluoromethylative dearomatization, hydroxylation and substitution reactions of indole derivatives The transformation proceeded via a hydroxylated “”acetal pool”” intermediate that could react with various nucleophiles. Several of the phosphine-oxide and indole-substituted products showed good fungicidal activity, suggesting that this protocol might be useful in the agrochem. field. The results came from multiple reactions, including the reaction of fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6Name: fac-Tris(2-phenylpyridine)iridium)

fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6) 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. Name: fac-Tris(2-phenylpyridine)iridium

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

The author of 《Visible-Light-Mediated Stereoselective 1,2-Iodoalkylation of Alkynes》 were Liu, Jie-Jie; Lan, Ling; Gao, Yu-Ting; Liu, Qi; Cheng, Liang; Wang, Dong; Liu, Li. And the article was published in Advanced Synthesis & Catalysis in 2019. Formula: C7H5N The author mentioned the following in the article:

A visible-light-mediated and photocatalyst/initiator-free addition to alkynes to afford iodo-substituted alkenyl derivatives I [R1 = n-Pr, Ph, 3-pyridyl, etc.; R = H, Me, n-Pr, etc.] and e.g. II were developed. An atom transfer radical addition mechanistic afforded a broad scope of valuable compounds I and e.g. II with high E/Z-selectivities, which were versatile intermediates for the synthesis of various tri- and tetra- substituted alkenes. In the part of experimental materials, we found many familiar compounds, such as 4-Ethynylpyridine(cas: 2510-22-7Formula: C7H5N)

4-Ethynylpyridine(cas: 2510-22-7) belongs to pyridine. Pyridine is a relatively complex molecule and exhibits a number of different bands in IR spectra. Among others, the bands characterizing the ν8a and ν19b modes have been found to be sensitive to the coordination or protonation of the molecule. Note that the band that is diagnostic for the PyH+ ion at about 1545 cm− 1 (ν19b mode) does not overlap with any of the other bands.Formula: C7H5N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem