Concise Synthesis of the Bicyclic Scaffold of <i>N</i>-Methylwelwitindolinone C Isothiocyanate via an Indolyne Cyclization
作者:Xia Tian、Alexander D. Huters、Colin J. Douglas、Neil K. Garg
DOI:10.1021/ol9007684
日期:2009.6.4
A concise synthesis of the N-methylwelwitindolinone C isothiocyanate scaffold is disclosed. The approach relies on an indolyne cyclization to construct the [4,3,1]-bicyclic ring system present in the natural product. Subsequent oxidation of the indole core occurs with excellent diastereoselectivity to afford oxindole 2, the structure of which was confirmed by X-ray crystallographic analysis.