Synthesis of pharmacologically important naphthoquinones and anticancer activity of 2-benzyllawsone through DNA topoisomerase-II inhibition
作者:Balagani Sathish Kumar、Kusumoori Ravi、Amit Kumar Verma、Kaneez Fatima、Mohammad Hasanain、Arjun Singh、Jayanta Sarkar、Suaib Luqman、Debabrata Chanda、Arvind S. Negi
DOI:10.1016/j.bmc.2016.12.043
日期:2017.2
Naphthoquinones are naturally occurring biologically active entities. Practical de novo syntheses of three naphthoquinones i.e. lawsone (1), lapachol (2), and β-lapachone (3b) have been achieved from commercially available starting materials. The conversion of lapachol (2) to β-lapachone (3b) was achieved through p-TSA/Iodine/BF3-etherate mediated regioselective cyclisation. Further, 2-alkyl and 2-benzyllawsone
萘醌是天然存在的生物活性实体。实用的从头合成三种萘醌的方法,即Lawone (1),lapachol(2)和β-lapachone(3b)是从可商购的起始原料中获得的。通过p-TSA /碘/ BF 3-醚酸酯介导的区域选择性环化作用,可将拉帕胆(2)转化为β-拉帕酮(3b)。此外,已经制备了2-烷基和2-苄基紫罗兰酮衍生物作为可能的抗癌剂。四种衍生物表现出显着的抗癌活性,最好的类似物即化合物21a表现出潜在的抗癌活性(IC 50 = 5.2μM)的FaDu细胞系。化合物21a通过激活caspase途径诱导凋亡,并在FaDU细胞的S期发挥细胞周期阻滞作用。它还显示出显着的拓扑异构酶II抑制活性。发现化合物21a在口服剂量高达1000 mg / kg的瑞士白化病小鼠中是安全的。