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]oxindoles2 to the respective spiropyrroline-2-oxindole derivatives 3 and their subsequent one-pot reductive dethiomethylation-N-methylation. [reaction: see text]