Facile Synthesis of 2-Acylthieno[2,3-<i>b</i>]quinolines via Cu-TEMPO-Catalyzed Dehydrogenation, sp<sup>2</sup>-C–H Functionalization (Nucleophilic Thiolation by S<sub>8</sub>) of 2-Haloquinolinyl Ketones
作者:Chitrala Teja、Fazlur Rahman Nawaz Khan
DOI:10.1021/acs.orglett.9b04598
日期:2020.3.6
An efficient, solvent-free synthesis of 2-acylthieno[2,3-b]quinolines is reported from 2-halo-quinolinyl ketones through Cu-TEMPO catalyzed dehydrogenation, sp2-C-H functionalization using elemental sulfur as thiol surrogate (sulfur source) and tetrabutylammonium acetate as an ionic reaction medium. The optimized reaction conditions give excellent product yields under mild reaction conditions with
据报道,2-卤代喹啉基酮通过Cu-TEMPO催化的脱氢反应,sp2-CH官能化(使用元素硫作为硫醇替代物(硫源)和甲硫氨酸)有效,无溶剂地合成了2-酰基噻吩并[2,3-b]喹啉。乙酸四丁铵作为离子反应介质。优化的反应条件在温和的反应条件下具有优异的化学选择性和宽泛的官能团耐受性,可提供优异的产品收率。弗里德兰德环化,还原和烯烃官能化反应进一步展示了合成分子的合成重要性。