Copper-Promoted Sandmeyer Difluoromethylthiolation of Aryl and Heteroaryl Diazonium Salts
作者:Jiang Wu、Yang Gu、Xuebing Leng、Qilong Shen
DOI:10.1002/anie.201502113
日期:2015.6.22
An efficient copper‐promoted difluoromethylthiolation of aryl and heteroaryldiazoniumsalts is described. The reaction is conducted under mild reaction conditions and various functional groups were compatible. In addition, reactions of heteroaryldiazoniumsalts such as pyridyl, quinolinyl, benzothiazolyl, thiophenyl, carbazolyl, and pyrazolyl diazoniumsalts occurred smoothly to afford the medicinally
Antitumor Agents. 194. Synthesis and Biological Evaluations of 4-β-Mono-, -Di-, and -Trisubstituted Aniline-4‘-<i>O</i>-demethyl-podophyllotoxin and Related Compounds with Improved Pharmacological Profiles
作者:Xiao-Kang Zhu、Jian Guan、Yoko Tachibana、Kenneth F. Bastow、Sung Jin Cho、Huey-Hwa Cheng、Yung-Chi Cheng、Marc Gurwith、Kuo-Hsiung Lee
DOI:10.1021/jm990055f
日期:1999.7.1
4'-O-demethyl-4-desoxypodophyllotoxins bearing mono-, di-, or trisubstituted anilines have been synthesized and evaluated as inhibitors of DNA topoisomerase II and tumor cell growth in tissue culture. Selected compounds were further evaluated as cytotoxic agents using a clonogenic survival assay. The target compounds include 4'-O-demethyl-4beta-[(4' '-(benzimidazol-2' '-yl)anilino]-4-desoxypodophyllotoxin (21),
A practicable quinoline synthesis from aniline and two amino acids was developed for generating a wide range of quinolines with high efficiency and diversity. Thus, it facilitated the creations of pharmaceutical derivatives, photochemical active compounds, and challenging scaffolds. The concept of using two amino acids as heterocyclic precursors has been raised for the first time. Mechanistic studies
Synthesis of 2‐Methylindoles through Ruthenium(II)‐Catalyzed Reaction of Aniline Derivatives with Allylamines
作者:Xue‐Yi He、Zhong‐Xia Wang
DOI:10.1002/adsc.202201181
日期:2023.2.7
The ruthenium(II)-catalyzed reaction of aniline derivatives with allylamines was carried out, affording 2-methylindoles viaC−H/C−Nbond activation. 4,5-Dimethyl pyrimidin-2-yl group attached on the nitrogen atom of anilines is the most effective directing group and N-allyl-4-fluoro-N-methylaniline is the optimal allylamine. The cyclization products were obtained in 16% to 96% yields. The method does
进行了钌 (II) 催化的苯胺衍生物与烯丙胺的反应,通过 C-H/C-N 键活化提供 2-甲基吲哚。连接在苯胺氮原子上的 4,5-二甲基嘧啶-2-基是最有效的导向基团,N-烯丙基-4-氟-N-甲基苯胺是最佳的烯丙胺。环化产物的收率为 16% 至 96%。该方法不需要外部氧化剂。提出了一种可能的机制。
Anti-AIDS agents. Part 61: Anti-HIV activity of new podophyllotoxin derivatives☆
作者:Xiao-Kang Zhu、Jian Guan、Zhiyan Xiao、L Mark Cosentino、Kuo-Hsiung Lee
DOI:10.1016/j.bmc.2004.04.048
日期:2004.8.1
A series of novel podophyllotoxin derivatives containing structural modifications at C-4 (7-14), C-4' (16-17), and the methylenedioxy A-ring (23-28) was synthesized and tested for inhibition of HIV replication. Four of these compounds (25-28) were previously reported to show EC50 values of <0.001 mug/mL and therapeutic index (TI) values >120. Three of the newly tested compounds (8.. 12, and 20) showed good activity with EC50 values of 0.012, <0.001, and 0.389 mug/ml and TI values of 19.1, >16, and 19.4, respectively. A comparison of the anti-HIV activity of these derivatives suggested that an opened A-ring with 6,7-dimethoxy substitution and a 4'-demethylated E ring enhanced anti-HIV activity. (C) 2004 Elsevier Ltd. All rights reserved.