We report the development of a rapid approach for directly converting indoles into 2-oxindoles promoted by HOCl formed in situ from the combination of (bis(trifluoroacetoxy) iodo)benzene (PIFA) and n-Bu4NCl ⋅ H2O. The procedure is widely functional group tolerant and provides 2-oxindoles in up to 95% yield within 5 min. The potential applications of the developed methodology are demonstrated by the
我们报告了一种快速方法的发展,该方法通过由(双(三
氟乙酰氧基)
碘)
苯 (
PIFA) 和n -Bu 4 NCl ⋅ H 2 O的组合原位形成的 HOCl 促进将
吲哚直接转化为 2-羟
吲哚。具有广泛的官能团耐受性,并在 5 分钟内以高达 95% 的产率提供 2-羟
吲哚。所开发方法的潜在应用通过 3-methyl-2-oxindole ( 11 a )的克级制备、螺-oxindole 26 a和26 b的一锅两步合成以及正式合成得到证明。(-)-叶蓍
嘌呤 ( 2 )。