Synthesis of a library of 1,2,3,7-tetrasubstituted indolizines using poly(ethylene glycol) as soluble support
作者:Guizhou Yue、Zuxing Chen、Guichun Yang
DOI:10.1002/jhet.5570430340
日期:2006.5
A library of 1,2,3,7-tetrasubstituted indolizines has been synthesized using poly(ethylene glycol) (PEG) as soluble polymer support. The PEG-bound pyridinium salts reacted with alkenes or alkynes in the presence of Et3N via 1,3-dipolar cycloaddition to give PEG-bound indolizine derivatives, which were cleaved by 1 % KCN/MeOH to afford 1,2,3,7-tetrasubstituted indolizines in good to excellent yields
使用聚(乙二醇)(PEG)作为可溶性聚合物载体合成了1,2,3,7-四取代的吲哚嗪文库。PEG结合的吡啶鎓盐在Et 3 N存在下,通过1,3-偶极环加成反应与烯烃或炔烃反应,得到PEG结合的吲哚嗪衍生物,用1%KCN / MeOH裂解得到1,2,3, 7-四取代的吲哚嗪的产率高至优异。