2-Substituted 3-methylnaphtho[1,2-b]furan-4,5-diones as novel L-shaped ortho-quinone substrates for NAD(P)H:quinone oxidoreductase (NQO1)
摘要:
A series of L-shaped ortho-quinone analogs were designed by analyzing the binding mode with NQO1. Metabolic studies demonstrated that compounds 2m, 2n and 2q exhibited higher metabolic rates than beta-lapachone. The docking studies, which supported the rationalization of the metabolic studies, constituted a prospective rational basis for the development of optimized ortho-quinone analogs. Besides, good substrates (2m, 2n and 2r) for NQO1 showed higher selective toxicity than beta-lapachone toward A549 (NQO1-rich) cancer cells versus H596 (NQO1-deficient) cells. Determination of superoxide (O-2(center dot-)) production and in vitro cytotoxicity evaluation in the presence of the NQO1 inhibitor dicoumarol confirmed that the ortho-quinones exerted their antitumor activity through NQO1-mediated ROS production by redox cycling. It was suggested that the L-shaped quinone substrates for NQO1 possessed better specificity and safety than beta-lapachone. (C) 2014 Elsevier Masson SAS. All rights reserved.
Employing a strategy for the construction of fused furans based on an intramolecular [3+2] dipolar cycloaddition reaction of nitrile oxide, the BCDringsystem 3 found in the tanshinone family as a common structural unit has been synthesized.
A metal‐free, one‐potsynthesis of 1,2‐naphthoquinone was accomplished from 2‐naphthol by utilizing economically cheap NBS under open air conditions. Initial formation of 1,1‐dibromonaphthalen‐2‐one and subsequent transformation afforded the 1,2‐naphthoquinone. This oxidation was completed within 30 min and had broad substrate scope. Moreover, this system tolerated heterocyclic systems and was also
Identification of ortho-naphthoquinones as anti-AML agents by highly efficient oxidation of phenols
作者:Huidan Huang、Ming Yan、Jianqiu Chen、Biao Yuan、Guitang Chen、Shujie Cheng、Dechun Huang、Zhen Gao、Chongjiang Cao
DOI:10.1016/j.bioorg.2019.01.025
日期:2019.5
A straightforward method for synthesizing ortho-naphthoquinones was identified using an easily available cobalt-Schiff base complex. Efficient oxidation of phenols to ortho-naphthoquinones was useful in obtaining compounds with potent biological activity for the treatment of acute myeloid leukemia (AML). Among these compounds, the compound 4h effectively inhibited the proliferation of different AML
使用容易获得的钴-席夫碱钴配合物鉴定了一种简单的合成邻萘醌的方法。将苯酚有效氧化为邻萘醌可用于获得具有有效生物学活性的化合物,用于治疗急性髓细胞性白血病(AML)。在这些化合物中,化合物4h在体外有效抑制了不同AML细胞系的增殖。进一步的体内抗肿瘤研究表明,在MV4-11异种移植模型中,以40 mg / kg / d服用4h导致肿瘤消退,导致肿瘤消退,而无明显毒性。发现钴-席夫碱配合物是苯酚向邻醌转化的有效催化剂,化合物4h代表了一种潜在支架,可优化AML治疗药物的生产。