centers along with an all carbon quaternary carbon center. A wide range of substrates with electron rich and electron deficient substituents on aryl rings were accepted well and yielded related spirocyclopropyl oxindoles in reasonable to good yields up to 80% for a total of 28 examples. A series of controlled experiments has been performed to illustrate the reaction pathway and reactivity of phenacyl
摘要 已经开发了一种简单有效的策略来构建螺环丙基羟
吲哚。这个过程有几个优点,如使用温和的碱、微波辅助和绿色合成,即
水性介质。反应以级联方式进行,即通过反式之间的[2 + 1]环化进行迈克尔环化-甲基-2-(2-oxoindolin-3-ylidene)
乙酸和苯酰
溴的
吡啶鎓盐。该协议导致产生两个手性中心以及一个全碳四元碳中心。在芳环上具有富电子和缺电子取代基的各种底物被很好地接受,并以合理到良好的产率产生了相关的螺环丙基羟
吲哚,总共 28 个实例的产率高达 80%。已经进行了一系列对照实验来说明苯酰
溴及其相应的
吡啶鎓盐对甲基 2-oxindolin-3-ylidene
乙酸酯的反应途径和反应性。