An Efficient and Ecofriendly Three-Component Reaction for the Rapid Synthesis of 2-Amino-4H-chromenes Catalyzed by a DABCO-Based Ionic Liquid
作者:Da-Zhen Xu、Cheng-Bin Li、Yu-Wei Li
DOI:10.1055/s-0037-1610123
日期:2018.9
catalyst could be recycled for at least five times. An efficient, economical, and green strategy for the construction of biologically relevant 2-amino-4H-chromene scaffolds via a tandem Knoevenagel–Pinner cyclization–Michael reaction has been successfully developed. In the presence of DABCO-based ionic liquids, two different 2-amino-4H-chromene derivatives, 2-amino-4-(indol-3-yl)-4H-chromenes and 2-amino
摘要 已经成功开发了通过串联的Knoevenagel-Pinner环化-Michael反应构建生物相关的2-氨基-4 H-色烯支架的有效,经济和绿色策略。在基于DABCO的离子液体的存在下,两种不同的2-amino-4 H -chromene衍生物,2-amino-4-(吲哚-3-yl)-4 H -chromenes和2-amino-4-(pyrazol-在温和的条件下,在较短的反应时间内就可以以良好的产率(4-97%)制备4-yl)-4 H-苯甲基。所有产品均通过简单的结晶纯化。催化剂可以循环至少五次。 已经成功开发了通过串联的Knoevenagel-Pinner环化-Michael反应构建生物相关的2-氨基-4 H-色烯支架的有效,经济和绿色策略。在基于DABCO的离子液体的存在下,两种不同的2-amino-4 H -chromene衍生物,2-amino-4-(吲哚-3-yl)-4 H