Microwave-assisted one-pot U-4CR and intramolecular O-alkylation toward heterocyclic scaffolds
作者:Xinglong Xing、Jinlong Wu、Gaofeng Feng、Wei-Min Dai
DOI:10.1016/j.tet.2006.05.001
日期:2006.7
α-bromoalkanoic acids, aldehydes, and isocyanides under controlled microwave heating has been established for a rapid access to highly functionalized 3,4-dihydro-3-oxo-2H-1,4-benzoxazines. With appropriate substitutions on the 1,4-benzoxazines, a microwave-assisted Cu-catalyzed intramolecular amidation was performed to furnish a novel class of heterocyclic conjugates of 1,4-benzoxazines with a 2-oxindole
已经建立了在受控的微波加热下从2-氨基苯酚与α-溴代链烷酸,醛和异氰酸酯开始的一锅式U-4CR和分子内O-烷基化序列,用于快速获得高度官能化的3,4-二氢- 3-氧代-2 H -1,4-苯并恶嗪。在1,4-苯并恶嗪上进行适当的取代后,进行了微波辅助的Cu催化的分子内酰胺化反应,以提供一类新型的1,4-苯并恶嗪的杂环共轭物,并带有一个通过C–N单键连接的2-氧杂吲哚。