Application of a catalyst-free Domino Mannich/Friedel-Crafts alkylation reaction for the synthesis of novel tetrahydroquinolines of potential antitumor activity
作者:Juan-Carlos Castillo、Elizabeth Jiménez、Jaime Portilla、Braulio Insuasty、Jairo Quiroga、Rodolfo Moreno-Fuquen、Alan R. Kennedy、Rodrigo Abonia
DOI:10.1016/j.tet.2017.12.049
日期:2018.3
efficient method to construct diversely substituted 1,2,3,4-tetrahydroquinolines in good to excellent yields has been developed through a catalyst-free Domino Mannich and intramolecular Friedel-Crafts alkylation reactions of N-arylamines with paraformaldehyde and electron-rich olefins via the formation of N-aryl-N-alkylmethyleneiminium ions as the key intermediates to afford the target products. Nine of
通过无催化剂的多米诺·曼尼希(Domino Mannich)和N-芳基胺与多聚甲醛和富电子的分子内Friedel-Crafts烷基化反应,已开发出一种有用且有效的方法,以良好的优良率构建各种取代的1,2,3,4-四氢喹啉。烯烃通过形成ñ -芳基- ñ -alkylmethyleneiminium离子作为关键中间体,得到目标产物。在美国国家癌症研究所(NCI)中评估了九种新化合物,其中化合物5f(R1 = 6-MeO,R2 = p -ClC6H4和X =吡咯烷-2-烯丙基)对57种癌细胞系表现出显着活性,最重要的GI50值范围为1.46至8.28μM体外测定。在HCT116结肠癌细胞上对活性化合物5f进行的进一步研究表明,其对细胞死亡的作用是通过细胞周期停滞(S期)以剂量依赖性方式发挥的,以及对细胞增殖过程的抑制。