Tag: 100-200

Xantphos as a Branch-Selective Ligand for the Acyclic sec-Alkyl Negishi Cross-Coupling of Heteroaryl Halides was written by Cherney, Alan H.;Hedley, Simon J.;Mennen, Steven M.;Tedrow, Jason S.. And the article was included in Organometallics in 2019.Application of 644-98-4 This article mentions the following:

We present the application of the common bidentate phosphine ligand Xantphos toward the highly selective Negishi cross-coupling of heteroaryl halides and acyclic sec-alkyl organozinc reagents to prepare pharmaceutically relevant motifs. Branched-to-linear ratios of >100:1 can be achieved for several substrates relevant to the pharmaceutical industry, and tolerance of certain acidic protons is exhibited. A high-throughput experimentation approach was taken to rapidly compare Xantphos Pd G3 to other selective Negishi coupling catalysts, leading to sep. reactivity profiles for each methodol. The utility of Xantphos Pd G3 was demonstrated through the scale-up and isolation of a complex pyridine building block. In the experiment, the researchers used many compounds, for example, 2-Isopropylpyridine (cas: 644-98-4Application of 644-98-4).

2-Isopropylpyridine (cas: 644-98-4) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Application of 644-98-4

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Antifungal Volatile Organic Compounds from the Endophyte Nodulisporium sp. Strain GS4d2II1a: a Qualitative Change in the Intraspecific and Interspecific Interactions with Pythium aphanidermatum was written by Sanchez-Fernandez, Rosa Elvira;Diaz, Daniel;Duarte, Georgina;Lappe-Oliveras, Patricia;Sanchez, Sergio;Macias-Rubalcava, Martha Lydia. And the article was included in Microbial Ecology in 2016.Computed Properties of C7H10N2O2 This article mentions the following:

This study demonstrates volatile organic compounds (VOCs) production as one of the defense mechanisms of the antagonistic endophyte Nodulisporium sp. GS4d2II1a, and the volatile changes in two times of the fungal growth; and, as result of its intra and interspecific interactions with the plant pathogen Pythium aphanidermatum. The antifungal activity of the volatile and diffusible metabolites was evaluated by means of three types of antagonism bioassays and by organic extract agar dilution VOCs were obtained by gas chromatog. coupled to mass spectrometry from 3- and 5-day Nodulisporium sp. cultures, as well as from its interspecific in vitro antagonistic interaction with the oomycete P. aphanidermatum, and its intraspecific Nodulisporium sp.-Nodulisporium sp. interaction. The GS4d2II1a strain completely inhibited the growth of two fungi and seven oomycetes by replacing their mycelia in simple antagonism bioassays and by producing in vitro volatile and diffusible metabolites that acted synergistically in multiple antagonism bioassays. Addnl., VOCs inhibited the growth of three oomycetes and one fungus in antagonism bioassays using divided plates. A total of 70 VOCs were detected, mainly including mono and sesquiterpenes, especially eucalyptol and limonene. Multiple correspondence anal. revealed four different volatile profiles, showing that volatiles changed with the fungus age and its intra and interspecific interactions. The metabolites produced by Nodulisporium sp. GS4d2II1a could be useful for biol. control of fungal and oomycetes plant pathogens of economically important crops. In the experiment, the researchers used many compounds, for example, 3-Amino-2,6-dimethoxypyridine (cas: 28020-37-3Computed Properties of C7H10N2O2).

3-Amino-2,6-dimethoxypyridine (cas: 28020-37-3) belongs to pyridine derivatives. Pyridines are an important class of heterocycles and occur in polysubstituted forms in many naturally occurring biologically active compounds, drug molecules and chiral ligands. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Computed Properties of C7H10N2O2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Palladium-Catalyzed Visible-Light-Driven Carboxylation of Aryl and Alkenyl Triflates by Using Photoredox Catalysts was written by Shimomaki, Katsuya;Nakajima, Tomoya;Caner, Joaquim;Toriumi, Naoyuki;Iwasawa, Nobuharu. And the article was included in Organic Letters in 2019.Name: tert-Butyl 5,6-dihydropyridine-1(2H)-carboxylate This article mentions the following:

A visible-light-driven carboxylation of aryl and alkenyl triflates with CO₂ is developed by using a combination of Pd and photoredox catalysts. This reaction proceeds under mild conditions and can be applied to a wide range of substrates including acyclic alkenyl triflates. In the experiment, the researchers used many compounds, for example, tert-Butyl 5,6-dihydropyridine-1(2H)-carboxylate (cas: 85838-94-4Name: tert-Butyl 5,6-dihydropyridine-1(2H)-carboxylate).

tert-Butyl 5,6-dihydropyridine-1(2H)-carboxylate (cas: 85838-94-4) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Name: tert-Butyl 5,6-dihydropyridine-1(2H)-carboxylate

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Iridium-catalyzed cleavage of C-O bonds using alcohols as reducing reagents was written by Hibe, Yuta;Ebe, Yusuke;Nishimura, Takahiro;Yorimitsu, Hideki. And the article was included in Chemistry Letters in 2017.Product Details of 4373-61-9 This article mentions the following:

A cationic iridium/binap catalyst-enabled reductive cleavage of C(sp²)-O bonds of aromatic compounds having nitrogen-based directing groups, such as 2-(2-butoxyphenyl)pyridine, 2-(2-methoxyphenyl)quinoline, 2-(2-methoxyphenyl)-1,3-benzothiazole, etc. was carried out in the presence of 2-propanol as reducing reagent. In the experiment, the researchers used many compounds, for example, 2-(m-Tolyl)pyridine (cas: 4373-61-9Product Details of 4373-61-9).

2-(m-Tolyl)pyridine (cas: 4373-61-9) belongs to pyridine derivatives. Pyridine is diamagnetic and has a diamagnetic susceptibility of −48.7 × 10−6 cm3·mol−1.The molecular electric dipole moment is 2.2 debyes. The standard enthalpy of formation is 100.2 kJ·mol−1 in the liquid phase and 140.4 kJ·mol−1 in the gas phase. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Product Details of 4373-61-9

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Regioselective (Diacetoxyiodo)benzene-Promoted Halocyclization of Unfunctionalized Olefins was written by Liu, Gong-Qing;Li, Yue-Ming. And the article was included in Journal of Organic Chemistry in 2014.Recommanded Product: 628-13-7 This article mentions the following:

A metal-free method for intramol. halocyclization of unfunctionalized olefins was detailed. (Diacetoxyiodo)benzene (PIDA) was very effective for haloamidation, haloetherification, and halolactonization of unfunctionalized olefins. E.g., in presence of PIDA and KI in CH₂Cl₂, intramol. iodoamidation of CH₂:CHCH₂CPh₂CH₂NHTs gave 91% pyrrolidine derivative (I). In the presence of 1.1 equiv of PIDA and suitable halogen sources, a variety of unfunctionalized olefins could be converted to the corresponding 1,2-bifunctional cyclic skeletons in good to excellent isolated yields, and key intermediates for biol. interesting compounds could be obtained in high yields under mild conditions via nucleophilic substitution of the thus obtained halocyclization products. In the experiment, the researchers used many compounds, for example, Pyridinehydrochloride (cas: 628-13-7Recommanded Product: 628-13-7).

Pyridinehydrochloride (cas: 628-13-7) belongs to pyridine derivatives. Pyridine’s the lone pair does not contribute to the aromatic system but importantly influences the chemical properties of pyridine, as it easily supports bond formation via an electrophilic attack. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Recommanded Product: 628-13-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Novel benzothiophene H₁-antihistamines for the treatment of insomnia was written by Moree, Wilna J.;Jovic, Florence;Coon, Timothy;Yu, Jinghua;Li, Bin-Feng;Tucci, Fabio C.;Marinkovic, Dragan;Gross, Raymond S.;Malany, Siobhan;Bradbury, Margaret J.;Hernandez, Lisa M.;O’Brien, Zhihong;Wen, Jianyun;Wang, Hua;Hoare, Samuel R. J.;Petroski, Robert E.;Sacaan, Aida;Madan, Ajay;Crowe, Paul D.;Beaton, Graham. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2010.Recommanded Product: 4-Methylpicolinonitrile This article mentions the following:

SAR of lead benzothiophene H₁-antihistamine I (R = 2-pyridyl) was explored to identify backup candidates with suitable pharmacokinetic profiles for an insomnia program. Several potent and selective H₁-antihistamines with a range of projected half-lives in humans were identified. Had a suitable human half-life as demonstrated in a human microdose study, but variability in pharmacokinetic profile, attributed to metabolic clearance, prevented further development of this compound I (R = 1-pyrazolyl) demonstrated lower predicted clearance in preclin. studies, and may represent a more suitable backup compound In the experiment, the researchers used many compounds, for example, 4-Methylpicolinonitrile (cas: 1620-76-4Recommanded Product: 4-Methylpicolinonitrile).

4-Methylpicolinonitrile (cas: 1620-76-4) belongs to pyridine derivatives. The pyridine ring occurs in many important compounds, including agrochemicals, pharmaceuticals, and vitamins. Several pyridine derivatives play important roles in biological systems. While its biosynthesis is not fully understood, nicotinic acid (vitamin B3) occurs in some bacteria, fungi, and mammals.Recommanded Product: 4-Methylpicolinonitrile

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Photo-Induced ortho-C-H Borylation of Arenes through In Situ Generation of Rhodium(II) Ate Complexes was written by Tanaka, Jin;Nagashima, Yuki;Araujo Dias, Antonio Junio;Tanaka, Ken. And the article was included in Journal of the American Chemical Society in 2021.Name: 2-Phenoxypyridine This article mentions the following:

Photoinduced in situ “oxidation” of half-sandwich metal complexes to “high-valent” cationic metal complexes has been used to accelerate catalytic reactions. Here, we report the unprecedented photoinduced in situ “reduction” of half-sandwich metal [Rh(III)] complexes to “low-valent” anionic metal [Rh(II)] ate complexes, which facilitate ligand exchange with electron-deficient elements (diboron). This strategy was realized by using a functionalized cyclopentadienyl (Cp^A3) Rh(III) catalyst we developed, which enabled the basic group-directed room temperature ortho-C-H borylation of arenes. In the experiment, the researchers used many compounds, for example, 2-Phenoxypyridine (cas: 4783-68-0Name: 2-Phenoxypyridine).

2-Phenoxypyridine (cas: 4783-68-0) belongs to pyridine derivatives. In contrast to benzene, Pyridine’s electron density is not evenly distributed over the ring, reflecting the negative inductive effect of the nitrogen atom. Halopyridines are particularly attractive synthetic building blocks in a variety of cross-coupling methods, including the Suzuki-Miyaura cross-coupling reaction.Name: 2-Phenoxypyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthesis of 3-pyridylpropenoic acid esters via Heck coupling of substituted 3-pyridyl triflates was written by Draper, Tandy L.;Bailey, Thomas R.. And the article was included in Synlett in 1995.Related Products of 15128-90-2 This article mentions the following:

From com. available 3-hydroxypyridines, several 3-pyridinepropenoic Et esters were prepared in good yield via Heck coupling of Et acrylate and the pyridyl triflate. In general, LiCl accelerated the coupling, but was not required for all reactions. In the experiment, the researchers used many compounds, for example, 3-Hydroxy-6-methyl-2-nitropyridine (cas: 15128-90-2Related Products of 15128-90-2).

3-Hydroxy-6-methyl-2-nitropyridine (cas: 15128-90-2) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Related Products of 15128-90-2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Novel benzothiophene H₁-antihistamines for the treatment of insomnia was written by Moree, Wilna J.;Jovic, Florence;Coon, Timothy;Yu, Jinghua;Li, Bin-Feng;Tucci, Fabio C.;Marinkovic, Dragan;Gross, Raymond S.;Malany, Siobhan;Bradbury, Margaret J.;Hernandez, Lisa M.;O’Brien, Zhihong;Wen, Jianyun;Wang, Hua;Hoare, Samuel R. J.;Petroski, Robert E.;Sacaan, Aida;Madan, Ajay;Crowe, Paul D.;Beaton, Graham. And the article was included in Bioorganic & Medicinal Chemistry Letters in 2010.Synthetic Route of C6H3FN2 This article mentions the following:

SAR of lead benzothiophene H₁-antihistamine I (R = 2-pyridyl) was explored to identify backup candidates with suitable pharmacokinetic profiles for an insomnia program. Several potent and selective H₁-antihistamines with a range of projected half-lives in humans were identified. Had a suitable human half-life as demonstrated in a human microdose study, but variability in pharmacokinetic profile, attributed to metabolic clearance, prevented further development of this compound I (R = 1-pyrazolyl) demonstrated lower predicted clearance in preclin. studies, and may represent a more suitable backup compound In the experiment, the researchers used many compounds, for example, 6-Fluoropicolinonitrile (cas: 3939-15-9Synthetic Route of C6H3FN2).

6-Fluoropicolinonitrile (cas: 3939-15-9) belongs to pyridine derivatives. Pyridine has a conjugated system of six π electrons that are delocalized over the ring. The molecule is planar and, thus, follows the Hückel criteria for aromatic systems. Reduced pyridines, namely tetrahydropyridines, dihydropyridines and piperidines, are found in numerous natural and synthetic compounds. The synthesis and reactivity of these compounds have often been driven by the fact many of these compounds have interesting and unique pharmacological properties. Synthetic Route of C6H3FN2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Synthesis, characterization, antimicrobial and interaction studies of pteridines with human serum albumin: A combined multi-spectroscopic and computational study was written by Raghu, M. S.;Kumar, K. Yogesh;Veena, K.;Kumar, C. B. Pradeep;Almalki, Amani Salem;Mani, G.;Alasmary, Fatmah Ali;Prashanth, M. K.. And the article was included in Journal of Molecular Structure in 2022.Computed Properties of C12H9NO This article mentions the following:

A novel series of pteridine derivatives I [R = H, F, Cl, F₃C, Br] was synthesized, and the structures of these mols. were established using elemental anal. and numerous spectroscopic methods. The disk diffusion technique was used to examine the antimicrobial potential of the newly synthesized mols. Among the compounds examined, I [R = F, F₃C] compounds had the highest impact against the examined bacterial and fungal strains. The compounds min. inhibitory concentration (MIC) was observed to be in the line of 0.41-6.83μM. UV-vis absorption, fluorescence quenching, FT-IR spectroscopy and CD (CD) along with mol. docking methods, were studies to assess the binding behavior of efficient pteridine derivatives I [R = F, F₃C] with human serum albumin (HSA). Formation of HSA-test compounds complex indicated the static quenching phenomena during fluorescence quenching of HSA by test compounds Synthesized I [R = F, F₃C] were further evaluated for three basic binding sites of HSA including subdomains IIA, IIIA, and IB, using mol. docking studies. Hydrophobic and interaction through hydrogen bonding influenced the binding pathway of HSA with test mols., according to the mol. docking data. Furthermore, the DFT technique was used to optimize the mol. geometry of potent I [R = F, F₃C] compounds using the B3LYP hybrid functional and the 6-311 + G(d, p) basis set. The optimized structure closely aligned with the test findings. The electrostatic potential framework was produced to visualize the mol.’s energy distribution and chem. reactive areas. In the experiment, the researchers used many compounds, for example, Phenyl(pyridin-2-yl)methanone (cas: 91-02-1Computed Properties of C12H9NO).

Phenyl(pyridin-2-yl)methanone (cas: 91-02-1) belongs to pyridine derivatives. The ring atoms in the pyridine molecule are sp2-hybridized. The nitrogen is involved in the π-bonding aromatic system using its unhybridized p orbital. The lone pair is in an sp2 orbital, projecting outward from the ring in the same plane as the σ bonds. Pyridine derivatives are also useful as small-molecule α-helix mimetics that inhibit protein-protein interactions, as well as functionally selective GABA ligands.Computed Properties of C12H9NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem