Synthesis of Novel Analogues of Marine Indole Alkaloids: Mono(indolyl)-4-trifluoromethylpyridines and Bis(indolyl)-4-trifluoromethylpyridines as Potential Anticancer Agents
摘要:
Mono(indolyl)-4-trifluoromethylpyridines and bis(indolyl)-4-trifluoromethylpyridines were synthesized using Suzuki cross-coupling reaction between 2-chloro-4-trifluoromethylpyridine 9, 2,6-dichloro-4-trifluoromethylpyridine 6 or 2,6-dichloro-3-cyano-4-trifluoromethylpyridine 23 and N-tosyl-3-indolylboronic acid 10. They were evaluated for cytotoxic activity against P388 and A-549 cells with IC50 values. 4-Trifluoromethyl-2,6-bis[3'-(N-tosyl-6'-methoxylindolyl)]pyridine 18 was identified as the most potent in this series. (C) 2001 Elsevier Science Ltd. All rights reserved.
Highly Enantioselective [3+2] Annulation of Indoles with Quinones to Access Structurally Diverse Benzofuroindolines
作者:Qiong-Jie Liu、Jun Zhu、Xiang-Yang Song、Lijia Wang、Sunewang R. Wang、Yong Tang
DOI:10.1002/anie.201800733
日期:2018.3.26
A facile and efficient method to produce optically pure benzofuroindolines, especially those without 3‐substituents that are susceptible to rearomatization, through [3+2] annulation of indoles with quinones is described. The suitable combination of a BOX ligand CuII hydrate complex and freshly activated molecular sieves functions to give controllably dynamic release of water, which enables the success
Transition-Metal-Free Access to Heteroaromatic-Fused 4-Tetralones by the Oxidative Ring Expansion of the Cyclobutanol Moiety
作者:Philipp Natho、Lewis A. T. Allen、Andrew J. P. White、Philip J. Parsons
DOI:10.1021/acs.joc.9b01290
日期:2019.8.2
Advances in the transition-metal-free cyclobutanol ringexpansion to 4-tetralones under N-bromosuccinimide mediation are described. We have expanded the scope of this ringexpansion methodology and investigated the effect substituents on the aromatic ring, and the cyclobutanol moiety, have on the outcome of the reaction. Limitations with certain substituents on the cyclobutanol moiety are also described
Highly Regioselective Friedel–Crafts Reactions of Electron-Rich Aromatic Compounds with Pyruvate Catalyzed by Lewis Acid-Base: Efficient Synthesis of Pesticide Cycloprothrin
An efficient synthesis of aromatic lactate esters is reported via highly regioselective Friedel–Crafts reactions of electron-richaromaticcompounds with pyruvate ester promoted by TiCl4 in the presence of basic Al2O3. The utility of the reaction is shown by the efficient synthesis of the pesticide cycloprothrin in high yield.
芳族乳酸酯的有效的合成报道通过用丙酮酸酯通过的TiCl促进富电子的芳族化合物的高度选择性Friedel-Crafts反应4在基本Al的存在2 Ó 3。该反应的实用性以高产率高效合成了农药环丙菊酯显示出来。
Silver‐Catalyzed Asymmetric Dearomatization of Electron‐Deficient Heteroarenes via Interrupted Barton–Zard Reaction
作者:Qian Wan、Jia‐Hao Xie、Chao Zheng、Yao‐Feng Yuan、Shu‐Li You
DOI:10.1002/anie.202107767
日期:2021.9
Herein we report a catalytic asymmetricdearomatizationreaction of electron-deficient heteroarenes with α-substituted isocyanoacetates through an interrupted Barton–Zard reaction. A range of optically active pyrrolo[3,4-b]indole derivatives was obtained in good yields (up to 97 %) with high stereoselectivities (up to >20:1 dr and 97 % ee), using a catalytic system consisting of a cinchona-derived
Access to Biaryl Sulfonamides by Palladium-Catalyzed Intramolecular Oxidative Coupling and Subsequent Nucleophilic Ring Opening of Heterobiaryl Sultams with Amines
作者:Joydev K. Laha、Neetu Dayal、Krupal P. Jethava、Dilip V. Prajapati
DOI:10.1021/acs.orglett.5b00290
日期:2015.3.6
The installation of sulfonamide pharmacophores on heterobiaryls has successfully been executed by a previously unknown palladium-catalyzedintramolecularoxidative coupling in N-arylsulfonyl heterocycles followed by novel ring opening of heterobiaryl sultams with amine nucleophiles. The protocol has a wide scope of substrates warranting broad applications in the synthesis of heterobiaryls containing