10242-11-2Relevant academic research and scientific papers
Copper-catalyzed formal c-h carboxylation of aromatic compounds with carbon dioxide through arylaluminum intermediates
Ueno, Atsushi,Takimoto, Masanori,Wylie,Nishiura, Masayoshi,Ikariya, Takao,Hou, Zhaomin
, p. 1010 - 1016 (2015)
The C-H bond carboxylation of various aromatic compounds with CO2 was achieved by the deprotonative alumination with a mixed alkyl amido lithium aluminate compound iBu3Al(TMP)Li followed by the NHC-copper-catalyzed carboxylation of the resulting arylaluminum species, which afforded the corresponding carboxylation products in high yield and high selectivity. In addition to benzene derivatives, heteroarenes such as benzofuran, benzothiophene, and indole derivatives are also suitable substrates. Functional groups such as Cl, Br, I, vinyl, amide, and CN could survive the reaction conditions. Some key reaction intermediates such as the copper aryl and isobutyl complexes and their carboxylation products were isolated and structurally characterized by X-ray crystallographic analyses, thus offering important information on the reaction mechanism.
An investigation of the synthesis of vilazodone
Hu, Fan,Su, Weike
, p. 243 - 247 (2020)
A novel synthetic route toward vilazodone is described by using 4-cyanoaniline and 5-bromo-2-hydroxybenzaldehyde as starting materials, with an overall yield of 24% and 99% purity. First, the intermediate (3-(4-chlorobutyl)-1H-indole-5-carbonitrile) is synthesized via diazotization of 4-cyanoaniline, followed by Fischer indole cyclization with 6-chlorohexanal. Subsequently, another intermediate, 5-(piperazin-1-yl)benzofuran-2-carboxamide, is generated via aromatic nucleophilic substitution of 5-bromobenzofuran-2-carboxamide with piperazine. Finally, vilazodone is obtained via nucleophilic substitution of the above two key intermediates by treatment with Et3N/K2CO3. In comparison to the original process, this route avoids the use of expensive and toxic reagents and resolves issues such as safety, environmental concerns, and high costs.
Novel oxindole/benzofuran hybrids as potential dual CDK2/GSK-3β inhibitors targeting breast cancer: design, synthesis, biological evaluation, and in silico studies
Eldehna, Wagdy M.,Al-Rashood, Sara T.,Al-Warhi, Tarfah,Eskandrani, Razan O.,Alharbi, Amal,El Kerdawy, Ahmed M.
, p. 270 - 285 (2021)
The serine/threonine protein kinases CDK2 and GSK-3β are key oncotargets in breast cancer cell lines, therefore, in the present study three series of oxindole-benzofuran hybrids were designed and synthesised as dual CDK2/GSK-3β inhibitors targeting breast cancer (5a–g, 7a–h, and 13a–b). The N1 -unsubstituted oxindole derivatives, series 5, showed moderate to potent activity on both MCF-7 and T-47D breast cancer cell lines. Compounds 5d–f showed the most potent cytotoxic activity with IC50 of 3.41, 3.45 and 2.27 μM, respectively, on MCF-7 and of 3.82, 4.53 and 7.80 μM, respectively, on T-47D cell lines, in comparison to the used reference standard (staurosporine) IC50 of 4.81 and 4.34 μM, respectively. On the other hand, the N1 -substituted oxindole derivatives, series 7 and 13, showed moderate to weak cytotoxic activity on both breast cancer cell lines. CDK2 and GSK-3β enzyme inhibition assay of series 5 revealed that compounds 5d and 5f are showing potent dual CDK2/GSK-3β inhibitory activity with IC50 of 37.77 and 52.75 nM, respectively, on CDK2 and 32.09 and 40.13 nM, respectively, on GSK-3β. The most potent compounds 5d–f caused cell cycle arrest in the G2/M phase in MCF-7 cells inducing cell apoptosis because of the CDK2/GSK-3β inhibition. Molecular docking studies showed that the newly synthesised N1 -unsubstituted oxindole hybrids have comparable binding patterns in both CDK2 and GSK-3β. The oxindole ring is accommodated in the hinge region interacting through hydrogen bonding with the backbone CO and NH of the key amino acids Glu81 and Leu83, respectively, in CDK2 and Asp133 and Val135, respectively, in GSK-3β. Whereas, in series 7 and 13, the N1 -substitutions on the oxindole nucleus hinder the compounds from achieving these key interactions with hinge region amino acids what rationalises their moderate to low anti-proliferative activity.
Enantioselective Synthesis of Five-Membered-Ring Atropisomers with a Chiral Rh(III) Complex
Shaaban, Saad,Li, Houhua,Otte, Felix,Strohmann, Carsten,Antonchick, Andrey P.,Waldmann, Herbert
, p. 9199 - 9202 (2020)
Axially chiral atropisomeric compounds are widely applied in asymmetric catalysis and medicinal chemistry, and efficient methods for their synthesis are in high demand. This applies in particular to atropisomers derived from five-membered aromatic rings because their lower barrier for rotation among the biaryl axis limits their asymmetric synthesis. We report here an enantioselective C-H functionalization method using our chiral RhJasCp complex for the synthesis of the biaryl atropisomer types that can be accessed from three different five-membered-ring heterocycles.
TETRAZOLE DERIVATIVES AS TRPA1 INHIBITORS
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, (2022/01/12)
The present disclosure provides certain tetrazole derivatives that are inhibitors of transient receptor potential ankyrin 1 (TRPA1), and are therefore useful for the treatment of diseases treatable by inhibition of TRPA1. Also provided are pharmaceutical compositions containing the same, and processes for preparing said compounds.
Tandem Synthesis of 2-Carboxybenzofurans via Sequential Cu-Catalyzed C-O Coupling and Mo(CO)6-Mediated Carbonylation Reactions
Mo, Qinliang,Sun, Nan,Jin, Liqun,Hu, Baoxiang,Shen, Zhenlu,Hu, Xinquan
, p. 11490 - 11500 (2020/10/12)
A modular tandem synthesis of 2-carboxybenzofurans from 2-gem-dibromovinylphenols has been established based on a sequence of Cu-catalyzed intramolecular C-O coupling and Mo(CO)6-mediated intermolecular carbonylation reactions. This protocol allowed one-step access to a broad variety of functionalized benzofuran-2-carboxylic acids, esters, and amides in good to excellent yields under Pd- and CO gas-free conditions.
Synthesis and biological evaluation of novel shikonin-benzo[b]furan derivatives as tubulin polymerization inhibitors targeting the colchicine binding site
Kong, Ling-Yi,Leng, Jia-Fu,Lian, Bao-Ping,Shao, Yu-Ying,Xia, Yuan-Zheng,Yin, Yong
, (2020/02/11)
A novel series of shikonin-benzo[b]furan derivatives were designed and synthesized as tubulin polymerization inhibitors, and their biological activities were evaluated. Most compounds revealed the comparable anti-proliferation activities against the cancer cell lines to that of shikonin and simultaneously low cytotoxicity to non-cancer cells. Among them, compound 6c displayed powerful anti-cancer activity with the IC50 value of 0.18 μM against HT29 cells, which was significantly better than that of the reference drugs shikonin and CA-4. What's more, 6c could inhibit tubulin polymerization and compete with [3H] colchicine in binding to tubulin. Further biological studies depicted that 6c can induce cell apoptosis and cell mitochondria depolarize, regulate the expression of apoptosis related proteins in HT29 cells. Besides, 6c actuated the HT29 cell cycle arrest at G2/M phase, and influenced the expression of the cell-cycle related protein. Moreover, 6c displayed potent inhibition on cell migration and tube formation that contributes to the antiangiogenesis. These results prompt us to consider 6c as a potential tubulin polymerization inhibitor and is worthy for further study.
Catalytic Asymmetric Dearomatization by Visible-Light-Activated [2+2] Photocycloaddition
Hu, Naifu,Jung, Hoimin,Zheng, Yu,Lee, Juhyeong,Zhang, Lilu,Ullah, Zakir,Xie, Xiulan,Harms, Klaus,Baik, Mu-Hyun,Meggers, Eric
, p. 6242 - 6246 (2018/05/03)
A novel method for the catalytic asymmetric dearomatization by visible-light-activated [2+2] photocycloaddition with benzofurans and one example of a benzothiophene is reported, thereby providing chiral tricyclic structures with up to four stereocenters including quaternary stereocenters. The benzofurans and the benzothiophene are functionalized at the 2-position with a chelating N-acylpyrazole moiety which permits the coordination of a visible-light-activatable chiral-at-rhodium Lewis acid catalyst. Computational molecular modeling revealed the origin of the unusual regioselectivity and identified the heteroatom in the heterocycle to be key for the regiocontrol.
Cathepsin K inhibitor and application thereof
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Paragraph 0219; 0220; 0221, (2017/08/28)
The invention relates to a cathepsin K inhibitor and an application thereof, in particular to compounds (as shown in formula (I) in the specification) for treating or preventing cathepsin-dependent diseases. The compounds comprise but not limited to the cathepsin K inhibitor. The compounds and pharmaceutical composition of the compounds can be used as a bone resorption inhibitor in the treatment of related diseases.
Efficient synthesis of a benzo[b]furan building block
Lee, Jaekyoo,Khanapure, Subhash P.,Kim, Hwa-Ok,Rajur, Raj S. B.,Li, Bing,Williams, John D.,Pai, Ramdas,Peet, Norton P.
body text, p. 3390 - 3396 (2010/12/25)
Unexpected difficulty in the conversion of a bromobenzofuran to the corresponding formylbenzofuran led us to develop a new synthesis for 5-formylbenzo[b]furan-2-carbonitrile (1). Copyright
