Aerobic Dehydrogenative Aromatization in the Preparation of 4-Aminoquinoline Derivatives by Synergistic Pd/Cu Catalysis
作者:Fei Chen、Huidan Geng、Chun Li、Jianta Wang、Bing Guo、Lei Tang、Yuan-Yong Yang
DOI:10.1021/acs.joc.3c01400
日期:2023.11.17
The 4-aminoquinoline moiety is widely present in various bioactive compounds and marketed drugs, while the preparation of this target structure relies heavily on the amination of 4-chloroquinolines. Herein, an atom and step economic procedure was developed based on an aerobic dehydrogenative aromatization strategy. Unlike the well-known palladium-catalyzed dehydrogenative aromatization of cyclohexanones
4-氨基喹啉部分广泛存在于各种生物活性化合物和市售药物中,而该目标结构的制备很大程度上依赖于4-氯喹啉的胺化。在此,基于有氧脱氢芳构化策略开发了原子和步骤经济程序。与众所周知的钯催化环己酮与胺的脱氢芳构化不同,协同 Pd/Cu 催化对于 2,3-二氢喹啉-4(1 H )-one 类型的底物至关重要。在优化条件下,一系列芳香族/脂肪族胺和2,3-二氢喹啉-4(1H ) -酮偶联,以中等到高收率得到相应的4-氨基喹啉产物,并应用当前的方法还展示了上市药物的制备和后期多样化。