Convenient synthesis of spiroindolenines from tryptamine-derived isocyanides and organic azides by cobalt catalysis in pure water
作者:Shuai Jiang、Wen-Bin Cao、Hai-Yan Li、Xiao-Ping Xu、Shun-Jun Ji
DOI:10.1039/d1gc00270h
日期:——
A Co-catalyzed coupling of 3-(2-isocyanoethyl)indoles with organic azides in pure water for accessing spiroindolenine derivatives was developed. This strategy features mild reaction conditions, high atom-economy, excellent yields, wide substrate scopes, and broad functional group tolerance. The products were obtained simply by sequential operation involving extraction, concentration, precipitation
建立了3-(2-异氰基乙基)吲哚与有机叠氮化物在纯水中的共催化偶联物,以得到螺环吲哚衍生物。该策略的特点是反应条件温和,原子经济性高,产率高,底物范围广,官能团耐受性强。只需通过包括萃取,浓缩,沉淀和过滤的顺序操作即可获得产品,而无需进行繁琐的柱色谱分离。更重要的是,水性催化体系可以循环至少十次而不降低催化活性。该策略提供了一种绿色高效的螺环吲哚衍生物的构建方法。