作者:Elisabetta Rossi、Diego Facoetti、Giorgio Abbiati、Laura d’Avolio、Lutz Ackermann
DOI:10.1055/s-0029-1217807
日期:2009.9
Easily accessible N-ethoxycarbonyl-2-alkynylindoles undergo, in the presence of primary aryl amines and under TiCl4/t-BuNH2 catalysis, domino hydroamination-annulation reactions giving rise to pyrimido[1,6-a]indolones in good to excellent yields. The reaction involves an initial highly regio- and chemoselective hydroamination reaction. The obtained compounds show interesting fluorescence properties and could represent a new class of useful markers for bioanalytical purpose.
易于获取的N-乙氧基碳酰基-2-烷基炔基吲哚在初级芳基胺存在下,经过TiCl4/t-BuNH2催化,发生多步水氨化-环化反应,得到吡啶[1,6-a]吲哚酮,产率良好到优秀。该反应涉及初始的高度区域和化学选择性的水氨化反应。获得的化合物显示出有趣的荧光特性,可以代表一类新的有用的生物分析标记物。