Novel piperazine and morpholine substituted quinolines: Selective synthesis through activation of 3,6,8-tribromoquinoline, characterization and their some metabolic enzymes inhibition potentials
作者:Osman Çakmak、Salih Ökten、Dilek Alımlı、Cem Cüneyt Ersanlı、Parham Taslimi、Ümit Muhammet Koçyiğit
DOI:10.1016/j.molstruc.2020.128666
日期:2020.11
described for convenient preparation of novel piperazine/morpholine substituted quinoline derivatives at C-3, C-6 and C-8 starting with 3,6,8-tribromoquinoline (6) by nucleophilic substitution via conventional heating or microwave assisted reaction conditions. 3,6,8-Tribromoquinoline (6) was treated with piperazine and morpholine under microvawe irradiation, which selectively furnished 3-mopholinyl and
摘要 描述了以 3,6,8-三溴喹啉 (6) 为起始原料,通过常规加热或微波辅助反应的亲核取代,方便地制备 C-3、C-6 和 C-8 上新型哌嗪/吗啉取代的喹啉衍生物的区域选择性路线。使适应。3,6,8-三溴喹啉 (6) 在微血管照射下用哌嗪和吗啉处理,选择性地提供 3-吗啉基和 3-哌嗪基喹啉衍生物 7 和 8,产率分别为 58% 和 60%。另一方面,通过 3,6,8-三溴喹啉的硝化活化喹啉的苯循环,以定量收率得到 5-硝基-3,6,8-三溴喹啉 (18)。然后,C-6 和 C-8 处的溴通过 SNAr 反应被吗啉和哌嗪选择性交换。因此,6,以高产率(分别为 82% 和 72%)制备了具有生物学价值的衍生物 8-二吗啉基喹啉 (22) 和 5-硝基-6,8-二哌嗪基喹啉 (24)。合成的化合物通过 1H NMR、13C NMR、2D NMR、XRD、HRMS 和 IR 光谱进行了充分