Synthesis of novel naphthoquinone aliphatic amides and esters and their anticancer evaluation
作者:Boonsong Kongkathip、Sunisa Akkarasamiyo、Komkrit Hasitapan、Pichamon Sittikul、Nonlawat Boonyalai、Ngampong Kongkathip
DOI:10.1016/j.ejmech.2012.12.006
日期:2013.2
Fourteen new naphthoquinone aliphatic amides and seventeen naphthoquinone aliphatic esters were synthesized in nine to ten steps from 1-hydroxy-2-naphthoic acid with 9–25% overall yield for the amides, and 16–21% overall yield for the esters. The key step of the amide synthesis is a coupling reaction between amine and various aliphatic acids using 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium
从1-羟基-2-萘甲酸分9到10个步骤合成了14种新的萘醌脂肪族酰胺和17种萘醌脂肪族酯,酰胺的总产率为9-25%,酯的总产率为16-21%。酰胺合成的关键步骤是使用4-(4,6-二甲氧基-1,3,5-三嗪-2-基)-4-甲基吗啉氯化物(DMTMM)作为偶联剂,使胺与各种脂肪酸发生偶联反应。酯合成中,DCC / DMAP或CDI用作脂族酸和萘醌醇之间的偶联剂。评估萘醌酰胺和酯对KB细胞的抗癌活性。发现当链长于7个碳原子时,萘醌脂族酰胺显示出比酯更强的抗癌活性。酰胺的最佳链预期为16个碳原子。另外,在酯部分上具有α-甲基的萘醌脂族酯比直链具有更强的抗癌活性。癸酸盐测定显示,在15μM和20μM处具有16个碳原子链的萘醌酰胺可以完全抑制hTopoIIα活性,而在10μM时,酶活性受到中等抑制。分子对接的结果也显示出与细胞毒性和脱级测定相同的趋势。癸酸盐测定显示,在15μM和20μM处具有1