A New Route to Spiropyrrolidinyl-oxindole Alkaloids via Iodide Ion Induced Rearrangement of [(<i>N</i>-Aziridinomethylthio)methylene]-2-oxindoles
作者:U. K. Syam Kumar、Hiriyakkanavar Ila、Hiriyakkanavar Junjappa
DOI:10.1021/ol016824i
日期:2001.12.1
A new approach for the synthesis of spiropyrrolidinyloxindole alkaloids, i.e. coerulescine (4) and horsfiline (5) has been developed via iodide ion induced rearrangement of [(N-aziridinomethylthio)methylene]oxindoles 2 to the respective spiropyrroline-2-oxindole derivatives 3 and their subsequent one-pot reductive dethiomethylation-N-methylation. [reaction: see text]
通过碘离子诱导的[(N-叠氮基甲硫基甲基)亚甲基]氧吲哚2重排成各自的螺吡咯啉-2-氧吲哚衍生物3和3,开发了一种新的螺环吡咯烷基氧吲哚生物碱合成方法,即菜青碱(4)和horsfiline(5)。他们随后的一锅还原性脱硫甲基化-N-甲基化。[反应:看文字]