Metal-free synthesis of 1H-indole-2-carbaldehydes by N-iodosuccinimide-mediated cyclization of 1-(2′-anilinyl)prop-2-yn-1-ols in water. A formal synthesis of (R)-calindol
作者:Prasath Kothandaraman、Sherman Jun Liang Lauw、Philip Wai Hong Chan
DOI:10.1016/j.tet.2013.06.032
日期:2013.9
cycloisomerization of 1-(2-aminophenyl)prop-2-yn-1-ols is described. The reaction is operationally straightforward and accomplished in good to excellent yields (48–91%) from a wide range of alcohol substrates that are low cost, easily accessible, and ecologically benign. The utility of the approach as a potential scale-up strategy for the synthesis of the indole was exemplified by the large-scale synthesis of one
描述了一种由N-碘琥珀酰亚胺(NIS)介导的方法,该方法可通过1-(2-氨基苯基)丙-2-yn-1-醇的环异构化有效地制备1 H-吲哚-2-甲醛。该反应操作简便易行,并且可通过低成本,易于获得且生态友好的多种醇底物以良好至极佳的收率(48-91%)完成。该方法作为吲哚合成的潜在放大策略的实用性通过一个实例的大规模合成以优异的产率得到了例证。(R)-卡林多醇的正式合成中也证明了该化学方法的合成效用。