Efficient, one-pot transformation of indoles into functionalized oxindole and spirooxindole systems under Swern conditions
作者:Pilar López-Alvarado、Judith Steinhoff、Sonia Miranda、Carmen Avendaño、J. Carlos Menéndez
DOI:10.1016/j.tet.2008.12.029
日期:2009.2
and oxalyl chloride under Swern conditions led to a one-pot, three-component process involving three different synthetic transformations, namely oxidation of indole to oxindole, introduction of a chlorine substituent at the oxindole C-3 position and substitution of the hydroxyl group in the side chain by chlorine, in good to excellent overall yields. The same conditions, applied to a 2-methylindole, afforded
在Swern条件下,带有3-或4-羟烷基链的吲哚衍生物与二甲基亚砜和草酰氯的反应导致了一个单锅,三组分过程,涉及三种不同的合成转化,即吲哚氧化为羟吲哚,引入氯羟吲哚C-3位的取代基和侧链中的羟基被氯取代,具有良好的总收率。将相同的条件应用于2-甲基吲哚,得到在其侧链上氧化的2-甲酰基吲哚衍生物。从一个带有2-羟烷基链的吲哚开始的反应提供了3-(2-羟烷基)氧吲哚。最后,将Swern条件应用于吲哚-3-丙酸或丁酸的衍生物,得到3-螺氧并吲哚内酯。