Regioselective synthesis of novel 4,5-diaryl functionalized 3,4-dihydropyrimidine-2(1H)-thiones via a non-Biginelli-type approach and evaluation of their in vitro anticancer activity
作者:Jacek G. Sośnicki、Łukasz Struk、Mateusz Kurzawski、Magdalena Perużyńska、Gabriela Maciejewska、Marek Droździk
DOI:10.1039/c4ob00094c
日期:——
An easy and novel approach to synthesize 4,5-diaryl functionalized 3,4-dihydropyrimidine-2(1H)-thiones via addition of aryllithiums to 5-aryl substituted pyrimidine-2(1H)-thiones, which could be regarded as a method complementary to the most widely used Biginelli-type synthesis, is described. In the reaction of aryllithiums with N–(Me)Bn substituted pyrimidine-2(1H)-thiones a high degree of regioselectivity of addition, leading to 4-aryl adducts, was achieved. Selected compounds tested for their in vitro anticancer activity against four human cancer cell lines showed the greatest activity against breast cancer (MCF7). 1-Benzyl-4-(3-hydroxyphenyl)-5-phenyl substituted 3,4-dihydropyrimidine-2(1H)-thione (10g) exhibiting 10-fold more potent activity than the best known monastrol (MON) stands as a promising candidate for further scaffold and asymmetric synthesis.
本研究介绍了一种通过芳基锂与 5-芳基取代的嘧啶-2(1H)-硫醚的加成反应合成 4,5-二芳基官能化 3,4-二氢嘧啶-2(1H)-硫醚的简便而新颖的方法,该方法可被视为最广泛使用的 Biginelli 型合成法的一种补充。在芳基锂与 N-(Me)Bn取代的嘧啶-2(1H)-硫离子的反应中,实现了高度的加成区域选择性,从而得到了 4-芳基加合物。所选化合物对四种人类癌细胞系进行了体外抗癌活性测试,结果表明对乳腺癌(MCF7)的活性最强。1-苄基-4-(3-羟基苯基)-5-苯基取代的 3,4-二氢嘧啶-2(1H)-硫酮(10g)的活性比已知的甲萘醌(MON)强 10 倍,有望作为进一步的支架和不对称合成的候选化合物。