The indium-mediated allylation of novel 3-(2-Boc-hydrazono)indolin-2-one derivatives, followed by a palladium-catalysed carboamination reaction, is described to afford unprecedented spirocyclic oxindoles in good yields. The method provides an efficient access to both cis and trans diastereoisomers of highly functionalized compounds, bearing an N-Boc, 5-substituted pyrazolidine ring at the C3-oxindole
新的 3-(2-Boc-hydrazono)indolin-2-one 衍
生物的
铟介导的烯丙基化,然后是
钯催化的碳胺化反应,被描述为以良好的收率提供前所未有的螺环羟
吲哚。该方法提供了一种高效获得高度官能化化合物的顺式和反式非对映异构体的方法,在 C3-羟
吲哚螺环上带有一个 N-Boc、5-取代的
吡唑烷环。从一系列取代的
靛红开始,并在关键环化步骤中使用各种芳基卤化物,充分证明了该方法的多功能性。