Ketene dithioacetal mediated synthesis of 1,3,4,5-tetrasubstituted pyrazole derivatives and their biological evaluation
作者:Pravin S. Bhale、Babasaheb P. Bandgar、Sakharam B. Dongare、Sadanand N. Shringare、Dnyaneshwar M. Sirsat、Hemant V. Chavan
DOI:10.1080/10426507.2019.1565760
日期:2019.8.3
Abstract Ketene dithioacetal mediated chemo- and regioselective synthesis of a series of novel 1,3,4,5-tetrasubstituted pyrazole derivatives (4a-l) integrated with a bioactive indole nucleus was achieved by reacting substituted 2-(1-methyl-1H-indole-3-carbonyl)-3,3-bis-(methylthio)-acrylonitrile (2) and substituted phenyl hydrazine hydrochloride (3) in the presence of a catalytic amount of anhydrous
摘要 通过取代的 2-(1-methyl-1H-) 反应实现了一系列与生物活性吲哚核整合的新型 1,3,4,5-四取代吡唑衍生物 (4a-l) 的烯酮二硫缩醛介导的化学和区域选择性合成。吲哚-3-羰基)-3,3-双-(甲硫基)-丙烯腈(2)和取代的苯肼盐酸盐(3)在催化量的无水K 2 CO 3 存在下在回流条件下。通过 1H NMR、NOESY、13C NMR、FT-IR 和 HRMS 数据确定结构。合成化合物对 MCF 7(乳腺癌)和正常 Vero(猴肾)细胞系的体外细胞毒性评估表明,化合物 5-(5-Bromo-1-methyl-1H-indol-3-yl)-1- (4-cyano-phenyl)-3-methylsulfanyl-1H-pyrazole-4-carbonitrile (4k) 对 MCF 7 (GI50 = 15) 显示出显着的细胞毒性。6 µM),对正常 Vero