22396-06-1Relevant academic research and scientific papers
Synthesis of 1,4-dihydropyrazolo[4,3-b]indoles via intramolecular C(sp2)-N bond formation involving nitrene insertion, DFT study and their anticancer assessment
Kaur, Manpreet,Mehta, Vikrant,Abdullah Wani, Aabid,Arora, Sahil,Bharatam, Prasad V.,Sharon, Ashoke,Singh, Sandeep,Kumar, Raj
supporting information, (2021/07/19)
We herein report a new synthetic route for a series of unreported 1,4-dihydropyrazolo[4,3-b]indoles (6–8) via deoxygenation of o-nitrophenyl-substituted N-aryl pyrazoles and subsequent intramolecular (sp2)-N bond formation under microwave irradiation expedite modified Cadogan condition. This method allows access to NH-free as well as N-substituted fused indoles. DFT study and controlled experiments highlighted the role of nitrene insertion as one of the plausible reaction mechanisms. Furthermore, the target compounds exhibited cytotoxicity at low micromolar concentration against lung (A549), colon (HCT-116), and breast (MDA-MB-231, and MCF-7) cancer cell lines, induced the ROS generation and altered the mitochondrial membrane potential of highly aggressive MDA-MB-231 cells. Further investigations revealed that these compounds were selective Topo I (6h) or Topo II (7a, 7b) inhibitors.
Enantioselective Synthesis of Tetrahydroquinolines via One-Pot Cascade Biomimetic Reduction?
Zhao, Zi-Biao,Li, Xiang,Chen, Mu-Wang,Wu, Bo,Zhou, Yong-Gui
supporting information, p. 1691 - 1695 (2020/11/03)
A novel and efficient protocol for the synthesis of chiral tetrahydroquinoline derivatives with excellent enantioselectivities and high yields has been developed through one-pot cascade biomimetic reduction. The detailed reaction pathway includes the acid-catalyzed and ruthenium-catalyzed formation of aromatic quinoline intermediates and biomimetic asymmetric reduction.
Tandem Cyclization?Annulation of α-Acidic Isocyanides with 2-Methyleneaminochalcones: Synthesis of Pyrrolo[2,3-c]quinoline Derivatives
Dong, Jinhuan,Wang, Xin,Shi, Hui,Wang, Lei,Hu, Zhongyan,Li, Yifei,Xu, Xianxiu
supporting information, p. 863 - 867 (2019/01/04)
Tandem cyclization-annulation of tosylmethyl isocyanide and isocyanoacetate with 2-methyleneaminochalcones as aza-1,5-dielectrophiles has been successfully developed. These domino transformations feature simultaneous formation of three bonds and two rings
Visible-Light Induction/Br?nsted Acid Catalysis in Relay for the Enantioselective Synthesis of Tetrahydroquinolines
Xiong, Wenhui,Li, Shan,Fu, Bo,Wang, Jinping,Wang, Qiu-An,Yang, Wen
supporting information, p. 4173 - 4176 (2019/06/07)
An efficient method merging Br?nsted acid catalysis with visible-light induction for the highly enantioselective synthesis of tetrahydroquinolines has been developed. This mild process directly transforms 2-aminoenones into 2-substituted tetrahydroquinolines with excellent enantioselectivities through a relay visible-light-induced cyclization/chiral phosphoric acid-catalyzed transfer hydrogenation reaction.
Three-Component Synthesis of a Library of m-Terphenyl Derivatives with Embedded β-Aminoester Moieties
Rocchi, Damiano,González, Juan F.,Gómez-Carpintero, Jorge,González-Ruiz, Víctor,Martín, M. Antonia,Sridharan, Vellaisamy,Menéndez, J. Carlos
, p. 722 - 731 (2018/10/20)
The three-component reaction between alkyl- or arylamines, β-ketoesters and chalcones in refluxing ethanol containing a catalytic amount of Ce(IV) ammonium nitrate allowed the construction of a large library of highly substituted dihydro-m-terphenyl derivatives containing β-alkylamino- or β-arylamino ester moieties. This process generates three new bonds and one ring and proceeds in high atom economy, having two molecules of water as the only side product. Another domino process, in which the original MCR was telescoped with a subsequent aza Michael/retro-aza Michael sequence, allowed the one-pot preparation of a library of compounds with a N-unsubstituted β-aminoester fragment. Finally, to extend the structural diversity of these libraries, we also examined the aromatization of the central ring of our compounds in the presence of dichlorodicyanoquinone. This reaction sequence did not affect the integrity of a stereogenic center belonging to the amino component.
Organocatalyzed aerobic oxidative Robinson-type annulation of 2-isocyanochalcones: expedient synthesis of phenanthridines
Hu, Zhongyan,Dong, Jinhuan,Men, Yang,Li, Yifei,Xu, Xianxiu
supporting information, p. 1739 - 1742 (2017/02/10)
A DBU-catalyzed aerobic oxidative Robinson annulation of 2-isocyanochalcones with active methylene ketones was developed for the expedient synthesis of phenanthridines in high to excellent yields. This unprecedented multistep domino reaction represents a
Asymmetric synthesis of CF3-containing tetrahydroquinoline: Via a thiourea-catalyzed cascade reaction
Zhu, Yuanyuan,Li, Boyu,Wang, Cui,Dong, Zhenghao,Zhong, Xiaoling,Wang, Kairong,Yan, Wenjin,Wang, Rui
supporting information, p. 4544 - 4547 (2017/07/10)
An organocatalytic asymmetric method for the synthesis of 2-CF3 tetrahydroquinoline has been achieved. The cascade reaction of 2-aminochalcones with β-CF3 nitroalkenes afforded the products bearing three contiguous stereogenic centers in good yields with excellent diastereoselectivities and enantioselectivities.
Pyrazolo[1,5-c]quinazoline derivatives and their simplified analogues as adenosine receptor antagonists: Synthesis, structure-affinity relationships and molecular modeling studies
Catarzi, Daniela,Colotta, Vittoria,Varano, Flavia,Poli, Daniela,Squarcialupi, Lucia,Filacchioni, Guido,Varani, Katia,Vincenzi, Fabrizio,Borea, Pier Andrea,Dal Ben, Diego,Lambertucci, Catia,Cristalli, Gloria
, p. 283 - 294 (2013/02/23)
A number of 5-oxo-pyrazolo[1,5-c]quinazolines (series B-1), bearing at position-2 the claimed (hetero)aryl moiety (compounds 1-8) but also a carboxylate group (9-14), were designed as hA3 AR antagonists. This study produced some interesting com
Cinchona-based squaramide-catalysed cascade aza-Michael-Michael addition: Enantioselective construction of functionalized spirooxindole tetrahydroquinolines
Yang, Wen,Du, Da-Ming
supporting information, p. 8842 - 8844 (2013/09/24)
An efficient enantioselective cascade aza-Michael-Michael addition reaction catalysed by a chiral bifunctional tertiary amine-squaramide catalyst has been developed. This cascade reaction proceeded well under mild conditions, furnishing highly functionalized spirooxindole tetrahydroquinolines with three contiguous stereocenters in excellent yields with excellent diastereoselectivities (>25:1 dr) and high enantioselectivities (up to 94% ee). The Royal Society of Chemistry 2013.
NUCLEAR RECEPTOR MODULATORS AND THEIR USE FOR THE TREATMENT AND PREVENTION OF CANCER
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Page/Page column 18, (2013/02/28)
Disclosed are compounds which are nuclear receptor modulators that can act as antagonists to the androgen receptor, for example, a compound of Formula I: wherein R1 to R5 and X1 to X5 are as described herein, as well as pharmaceutically acceptable salts, solvates, and stereoisomers thereof. Pharmaceutical compositions comprising such compounds, as well as methods of use, and treatment for cancers, including prostate cancers, other nuclear receptor mediated cancers, and other conditions, are also disclosed.
