Day: October 19, 2022

Zhang, Jing-Tao; Wang, Li-Xia; Yang, Feng-Min; Yang, Luo; Liu, Yan; Tang, Ya-Lin published their research in Bioorganic & Medicinal Chemistry in 2021. The article was titled 《Selective recognition of DNA parallel G-quadruplexes by 3,8a-disubstituted indolizinones》.Synthetic Route of C7H5N The article contains the following contents:

Owing to its potential biol. relevance, DNA G-quadruplex has been considered as a prospective anti-cancer target. Some known G-quadruplex-interactive N-containing compounds with low cytotoxicity have become prospective anticancer drugs. Here we reported a new type of N-containing alkaloids 3,8a-disubstituted indolizinones, and investigated their substituent effects at 3- and 8a-positions in targeting to DNA c-myc G-quadruplex. And then we used 3-naphtyl-8a-(pyridin-2-yl) substrate I8 as an example, and investigated its ability in targeting to DNA parallel G-quadruplexes in vitro. The results came from multiple reactions, including the reaction of 4-Ethynylpyridine(cas: 2510-22-7Synthetic Route of C7H5N)

4-Ethynylpyridine(cas: 2510-22-7) 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 C7H5N

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Hattori, Shingo; Hirata, Shuntaro; Shinozaki, Kazuteru published their research in Journal of Physical Chemistry B in 2021. The article was titled 《Emission Intensity Enhancement for Iridium(III) Complex in Dimethyl Sulfoxide under Photoirradiation》.COA of Formula: C33H24IrN3 The article contains the following contents:

We found emission intensity enhancement for fac-Ir(ppy)3 (ppy = 2-(2′-phenyl)pyridine) in aerated DMSO during photoirradiation for the first time. This phenomenon was concluded to be responsible for the consumption of 3O2 dissolved in DMSO through di-Me sulfone production by photosensitized reaction using fac-Ir(ppy)3. A 3O2 adduct of DMSO mol. was detected by UV absorption measurement and theor. calculation We proposed a mechanism for the emission enhancement reaction including 1,3O2 mols. and 1,3O2-DMSO adducts and validated it through a simulation of emission intensity change using an ordinary differential equation solver. The experimental part of the paper was very detailed, including the reaction process of fac-Tris(2-phenylpyridine)iridium(cas: 94928-86-6COA of Formula: C33H24IrN3)

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. COA of Formula: C33H24IrN3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Cheng, Peter T. W.; Kaltenbach, Robert F.; Zhang, Hao; Shi, Jun; Tao, Shiwei; Li, Jun; Kennedy, Lawrence J.; Walker, Steven J.; Shi, Yan; Wang, Ying; Dhanusu, Suresh; Reddigunta, Ramesh; Kumaravel, Selvakumar; Jusuf, Sutjano; Smith, Daniel; Krishnananthan, Subramaniam; Li, Jianqing; Wang, Tao; Heiry, Rebekah; Sum, Chi Shing; Kalinowski, Stephen S.; Hung, Chen-Pin; Chu, Ching-Hsuen; Azzara, Anthony V.; Ziegler, Milinda; Burns, Lisa; Zinker, Bradley A.; Boehm, Stephanie; Taylor, Joseph; Sapuppo, Julia; Mosure, Kathy; Everlof, Gerry; Guarino, Victor; Zhang, Lisa; Yang, Yanou; Ruan, Qian; Xu, Carrie; Apedo, Atsu; Traeger, Sarah C.; Cvijic, Mary Ellen; Lentz, Kimberley A.; Tirucherai, Giridhar; Sivaraman, Lakshmi; Robl, Jeffrey; Ellsworth, Bruce A.; Rosen, Glenn; Gordon, David A.; Soars, Matthew G.; Gill, Michael; Murphy, Brian J. published an article in 2021. The article was titled 《Discovery of an Oxycyclohexyl Acid Lysophosphatidic Acid Receptor 1 (LPA1) Antagonist BMS-986278 for the Treatment of Pulmonary Fibrotic Diseases》, and you may find the article in Journal of Medicinal Chemistry.Safety of 2,5-Dibromopyridine The information in the text is summarized as follows:

The oxycyclohexyl acid BMS-986278 (33) is a potent lysophosphatidic acid receptor 1 (LPA1) antagonist, with a human LPA1Kb of 6.9 nM. The structure-activity relationship (SAR) studies starting from the LPA1 antagonist clin. compound BMS-986020 (1), which culminated in the discovery of 33, are discussed. The detailed in vitro and in vivo preclin. pharmacol. profiles of 33, as well as its pharmacokinetics/metabolism profile, are described. On the basis of its in vivo efficacy in rodent chronic lung fibrosis models and excellent overall ADME (absorption, distribution, metabolism, excretion) properties in multiple preclin. species, 33 was advanced into clin. trials, including an ongoing Phase 2 clin. trial in patients with lung fibrosis (NCT04308681). After reading the article, we found that the author used 2,5-Dibromopyridine(cas: 624-28-2Safety of 2,5-Dibromopyridine)

2,5-Dibromopyridine(cas: 624-28-2) 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.Safety of 2,5-Dibromopyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Xu, Siqiong; Wang, Xiao; Zhang, Fuyin; Jiang, Yinhu; Zhang, Yanting; Cheng, Minggen; Yan, Xin; Hong, Qing; He, Jian; Qiu, Jiguo published an article in 2022. The article was titled 《PicR as a MarR family transcriptional repressor multiply controls the transcription of picolinic acid degradation gene cluster pic in Alcaligenes faecalis JQ135》, and you may find the article in Applied and Environmental Microbiology.Formula: C6H5NO2 The information in the text is summarized as follows:

Picolinic acid (PA) is a natural toxic pyridine derivative as well as an important intermediate used in the chem. industry. In a previous study, we identified a gene cluster, pic, that responsible for the catabolism of PA in Alcaligenes faecalis JQ135. However, the transcriptional regulation of the pic cluster remains known. This study showed that the entire pic cluster was composed of 17 genes and transcribed as four operons: picR, picCDEF, picB4B3B2B1, and picT1A1A2A3T2T3MN. Deletion of picR, encoding a putative MarR-type regulator, greatly shortened the lag phase of PA degradation An electrophoretic mobility shift assay and DNase I footprinting showed that PicR has one binding site in the picR-picC intergenic region and two binding sites in the picB-picT1 intergenic region. The DNA sequences of the three binding sites have the palindromic characteristics of TCAG-N4-CTNN: the space consists of four nonspecific bases, and the four palindromic bases on the left and the first two palindromic bases on the right are strictly conserved, while the last two bases on the right vary among the three binding sites. An in vivo β-galactosidase activity reporter assay indicated that 6-hydroxypicolinic acid but not PA acted as a ligand of PicR, preventing PicR from binding to promoter regions and thus derepressing the transcription of the pic cluster. This study revealed the neg. transcriptional regulation mechanism of PA degradation by PicR in A. faecalis JQ135 and provides new insights into the structure and function of the MarR-type regulator. The results came from multiple reactions, including the reaction of Picolinic acid(cas: 98-98-6Formula: C6H5NO2)

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.Formula: C6H5NO2

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

In 2022,Makarian, Makar; Gonzalez, Michael; Salvador, Stephanie M.; Lorzadeh, Shahrokh; Hudson, Paula K.; Pecic, Stevan published an article in Journal of Molecular Structure. The title of the article was 《Synthesis, kinetic evaluation and molecular docking studies of donepezil-based acetylcholinesterase inhibitors》.Computed Properties of C6H4BrNO The author mentioned the following in the article:

In an effort to develop new therapeutic agents to treat Alzheimer′s disease, a series of donepezil-based analogs were designed, synthesized using an environmentally friendly route, and biol. evaluated for their inhibitory activity against elec. eel acetylcholinesterase (AChE) enzyme. In vitro studies revealed that the Ph moiety of donepezil can be successfully replaced with a pyridine ring leading to equally potent inhibitors of elec. eel AChE. Further kinetic evaluations of the most potent inhibitor showed a dual-binding (mixed inhibition) mode, similar to donepezil. Mol. modeling studies suggest that several addnl. residues could be involved in the binding of this inhibitor in the human AChE enzyme active site compared to donepezil. The experimental part of the paper was very detailed, including the reaction process of 2-Bromonicotinaldehyde(cas: 128071-75-0Computed Properties of C6H4BrNO)

2-Bromonicotinaldehyde(cas: 128071-75-0) 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. Computed Properties of C6H4BrNO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application In Synthesis of 2-(2-Hydroxyethyl)pyridineIn 2019 ,《Highly Chemoselective gem-Difluoropropargylation of Aliphatic Alcohols》 appeared in Chemistry – A European Journal. The author of the article were Okamura, Toshitaka; Egoshi, Syusuke; Dodo, Kosuke; Sodeoka, Mikiko; Iwabuchi, Yoshiharu; Kanoh, Naoki. The article conveys some information:

α,α-Difluoropropargyl ethers were prepared by complexation of 3-bromo-3,3-difluoro-1-alkynes with dicobalt octacarbonyl, etherification with alcs. and decomplexation. Despite the potential of α-fluoroethers in medicinal chem., their synthetic methods, especially etherification of aliphatic alcs., have been limited. Herein, we developed two- and three-step gem-difluoropropargylation of aliphatic alcs. including amino acid derivatives and naturally occurring bioactive mols. Highly chemoselective etherification proceeded by using the gem-difluoropropargyl bromide dicobalt complex in the presence of silver triflate and triethylamine. Decomplexation of dicobalt complexes was achieved by using cerium ammonium nitrate or N,N,N’-trimethylethylenediamine. The thus obtained gem-difluoropropargyl ethers were converted to various α-difluoroethers which are expected to be useful for medicinal chem. In the experimental materials used by the author, we found 2-(2-Hydroxyethyl)pyridine(cas: 103-74-2Application In Synthesis of 2-(2-Hydroxyethyl)pyridine)

2-(2-Hydroxyethyl)pyridine(cas: 103-74-2) belongs to pyridine. The basicity and metallophilic high donor number of these π-deficient systems has long favored them as ligands in metal catalysis. The last decade saw pyridine assume a stronger role as functional group for directed C–H oxidation/activation.Application In Synthesis of 2-(2-Hydroxyethyl)pyridine

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Application In Synthesis of 2-Pyridinylboronic acidIn 2021 ,《Scaffold-Hopping Strategy on a Series of Proteasome Inhibitors Led to a Preclinical Candidate for the Treatment of Visceral Leishmaniasis》 appeared in Journal of Medicinal Chemistry. The author of the article were Thomas, Michael; Brand, Stephen; De Rycker, Manu; Zuccotto, Fabio; Lukac, Iva; Dodd, Peter G.; Ko, Eun-Jung; Manthri, Sujatha; McGonagle, Kate; Osuna-Cabello, Maria; Riley, Jennifer; Pont, Caterina; Simeons, Frederick; Stojanovski, Laste; Thomas, John; Thompson, Stephen; Viayna, Elisabet; Fiandor, Jose M.; Martin, Julio; Wyatt, Paul G.; Miles, Timothy J.; Read, Kevin D.; Marco, Maria; Gilbert, Ian H.. The article conveys some information:

There is an urgent need for new treatments for visceral leishmaniasis (VL), a parasitic infection which impacts heavily large areas of East Africa, Asia, and South America. We previously reported on the discovery of GSK3494245/DDD01305143 (1) as a preclin. candidate for VL and, herein, we report on the medicinal chem. program that led to its identification. A hit from a phenotypic screen was optimized to give a compound with in vivo efficacy, which was hampered by poor solubility and genotoxicity. The work on the original scaffold failed to lead to developable compounds, so an extensive scaffold-hopping exercise involving medicinal chem. design, in silico profiling, and subsequent synthesis was utilized, leading to the preclin. candidate. The compound was shown to act via proteasome inhibition, and we report on the modeling of different scaffolds into a cryo-EM structure and the impact this has on our understanding of the series’ structure-activity relationships. In the experiment, the researchers used many compounds, for example, 2-Pyridinylboronic acid(cas: 197958-29-5Application In Synthesis of 2-Pyridinylboronic acid)

2-Pyridinylboronic acid(cas: 197958-29-5) belongs to pyridine. The basicity and metallophilic high donor number of these π-deficient systems has long favored them as ligands in metal catalysis. The last decade saw pyridine assume a stronger role as functional group for directed C–H oxidation/activation.Application In Synthesis of 2-Pyridinylboronic acid

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

HPLC of Formula: 29682-15-3In 2019 ,《New pyridine based liquid crystalline esters with different terminal chains》 appeared in Journal of Molecular Structure. The author of the article were Karanlik, Gurkan; Ocak, Hale; Bilgin Eran, Belkiz. The article conveys some information:

The synthesis, structural and mesomorphic characterization of new pyridine-based Me esters carrying a n-alkoxy chain or 3,7-dimethyloctyloxy branched group at terminal I [R = C8H17, C10H21, C12H25, (4S)-4,8-dimethylnonyl, 4,8-dimethylnonyl] have been presented. The liquid crystalline properties of the new pyridine-based calamitic mols. have been investigated by polarized optical microscopy and differential scanning calorimetry. New compounds exhibit enantiotropic smectic A mesophase at a variable mesomorphic range depending on alkoxy chain length and branching at terminal. The presence of a branched terminal group in chiral or racemic form gives rise to a sharply increase in mesomorphic range as well as decrease in crystallization points by preserving mesophase type. The experimental process involved the reaction of Methyl 5-bromopicolinate(cas: 29682-15-3HPLC of Formula: 29682-15-3)

Methyl 5-bromopicolinate(cas: 29682-15-3) belongs to pyridine. The basicity and metallophilic high donor number of these π-deficient systems has long favored them as ligands in metal catalysis. The last decade saw pyridine assume a stronger role as functional group for directed C–H oxidation/activation.HPLC of Formula: 29682-15-3

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

COA of Formula: C7H7NOIn 2020 ,《Copper-catalyzed formal [1 + 2 + 2]-annulation of alkyne-tethered diazoacetates and pyridines: access to polycyclic indolizines》 appeared in Organic & Biomolecular Chemistry. The author of the article were Dong, Shanliang; Huang, Jingjing; Sha, Hongkai; Qiu, Lihua; Hu, Wenhao; Xu, Xinfang. The article conveys some information:

A copper-catalyzed formal [1 + 2 + 2] annulation of alkyne-tethered diazo compounds with pyridines afforded polycyclic fused indolizines in good yields under mild reaction conditions was reported. This method features the use of an inexpensive copper catalyst and readily available starting materials, broad substrate generality and operational simplicity. Notably, a variety of natural product derivatives were compatible under the current conditions, which showed significant potential of this method for the selective decoration and modification of analogous biomols. or pharmaceuticals. In the experiment, the researchers used 4-Acetylpyridine(cas: 1122-54-9COA of Formula: C7H7NO)

4-Acetylpyridine(cas: 1122-54-9) belongs to pyridine. The basicity and metallophilic high donor number of these π-deficient systems has long favored them as ligands in metal catalysis. The last decade saw pyridine assume a stronger role as functional group for directed C–H oxidation/activation.COA of Formula: C7H7NO

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem

Recommanded Product: 1692-25-7In 2020 ,《Discovery of novel quinazoline derivatives as potent PI3Kδ inhibitors with high selectivity》 appeared in European Journal of Medicinal Chemistry. The author of the article were Teng, Yu; Li, Xinyu; Ren, Shengnan; Cheng, Yu; Xi, Kun; Shen, Hongtao; Ma, Wenzhuo; Luo, Guoshun; Xiang, Hua. The article conveys some information:

Herein, a series of quinazoline derivatives I [R1 = Br, 3-pyridyl, (6-fluoro-3-pyridyl), (6-chloro-3-pyridyl), 3-quinolyl; R2 = vinyl, Et, HC=CH2CH3, C≡CCH3; R3 = H, Me] bearing acrylamide fragment were prepared using skeleton-deconstruction strategy. The preliminary bioactivity evaluation resulted in the discovery of lead compound I [R1 = 3-quinolyl; R2 = vinyl; R3 = Me]. Compound I [R1 = 3-quinolyl; R2 = vinyl; R3 = Me] exhibited excellent enzyme activity against PI3Kδ (IC50 = 27.5 nM) compared with BEZ235 as well as the significant anti-proliferation activities. With the high selectivity over other PI3K isoforms and potent effects on PI3K/Akt pathway, compoundI [R1 = 3-quinolyl; R2 = vinyl; R3 = Me] could be identified as a promising PI3Kδ inhibitor worthy of further profiling. The experimental process involved the reaction of Pyridin-3-ylboronic acid(cas: 1692-25-7Recommanded Product: 1692-25-7)

Pyridin-3-ylboronic acid(cas: 1692-25-7) belongs to pyridine. Pyridine and pyridine-derived structures are privileged pharmacophores in medicinal chemistry and an essential functionality for organic chemists. As the prototypical π-deficient heterocycle, pyridine illustrates distinctive chemistry as both substrate and reagent. Recommanded Product: 1692-25-7

Referemce:
Pyridine – Wikipedia,
Pyridine | C5H5N – PubChem