Synthesis, reactive oxygen species generation and copper-mediated nuclease activity profiles of 2-aryl-3-amino-1,4-naphthoquinones
摘要:
Here we report a series of 2-aryl-3-amino-1,4-naphthoquinones that generated reactive oxygen species (ROS) such as superoxide and hydrogen peroxide upon incubation in pH 7.4 under ambient aerobic conditions. ROS generation from these compounds was sensitive to structural modifications at the 3-amino position and a 2-aryl substituent promoted ROS generation. A number of these compounds were found to induce DNA damage in the presence of Cu(II) without any added reducing agent. Our data suggests that 2-aryl-3-amino-1,4-naphthoquinones' propensity to produce ROS correlated well with its DNA damage inducing ability. 2-Phenyl-3-pyrrolid-1-yl-1,4-naphthoquinone (22) was found to damage DNA at 1 mu M suggesting that these compounds may have therapeutic relevance in targeting cancers which over-express Cu(II) (C) 2012 Elsevier Ltd. All rights reserved.
3-indolylnaphthoquinones with amines, such as various (hetero)aromaticamine and aliphatic amine via t-BuOK-mediated oxidative coupling at room temperature has been developed. This reaction provides efficient access to the biologically important and synthetically useful 2-amino-1,4-naphthoquinones and 2-amino-3-indolylnaphthoquinones with good yields undermildconditions. The present protocol is simple
1,4-萘醌和相关的 3-吲哚基萘醌与胺(例如各种(杂)芳香胺和脂肪胺)在室温下通过 t -BuOK 介导的氧化偶联进行无过渡金属胺化。该反应可以在温和条件下以良好的收率有效地获得具有重要生物学意义和合成用途的2-氨基-1,4-萘醌和2-氨基-3-吲哚基萘醌。本方案简单实用,具有良好的官能团耐受性。此外,将所得2-氨基-3-吲哚基萘醌进一步转化合成多环N-杂环。
A SUCCESSFUL PREPARATION OF 2-ARYL-2,3-DIHYDRO-2,3-IMINO-1,4-NAPHTHOQUINONES
作者:Kazuhiro Maruyama、Takuji Ogawa
DOI:10.1246/cl.1981.1027
日期:1981.7.5
A new class of compounds, 2-aryl-2,3-dihydro-2,3-imino-1,4-naphthoquinones 3, was synthesized for the first time by heating 2-aryl-1,4-naphthoquinones with aryl azides. The yields were 30–50% when p-methoxyphenyl azide was used.
Provided herein are compounds of the formula (IV) as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful as MITF inhibitors, MITF pathway inhibitors and for the treatment of cancer.
BiCl<sub>3</sub> catalyzed synthesis of 2-amino-1,4-naphthoquinones and 1,4-naphthoquinon-2-sulfides and one-pot sequential amine-arylation of 1,4-naphthoquinone
作者:Mayurakhi Bhuyan、Gakul Baishya
DOI:10.1039/d2ob01792j
日期:——
Using the Lewis acid catalyst BiCl3, a new method for the synthesis of 2-amino-1,4-naphthoquinones and 1,4-naphthoquinon-2-sulfides from 1,4-naphthoquinone has been devised. This method has a broad substrate scope and product extraction is easy. It is low-cost, requires mild and sustainable reaction conditions and results in superior product yields. Additionally, this study presents the first technique
使用路易斯酸催化剂BiCl 3,设计了一种从1,4-萘醌合成2-氨基-1,4-萘醌和1,4-萘醌-2-硫化物的新方法。该方法底物适用范围广,产物提取容易。它成本低廉,需要温和且可持续的反应条件,并可提高产品收率。此外,本研究提出了第一种用胺和芳基肼/K 2 S 2 O 8进行单锅顺序胺芳基化的技术直接从 1,4-萘醌生产芳基化 2-氨基-1,4-萘醌。这种从经历自由基偶联反应的芳基肼产生芳基自由基的操作上直接的通过自由基捕获控制实验得到了很好的证明。