Fates of imine intermediates in radical cyclizations of <i>N</i>-sulfonylindoles and ene-sulfonamides
作者:Hanmo Zhang、E Ben Hay、Stephen J Geib、Dennis P Curran
DOI:10.3762/bjoc.11.181
日期:——
imine intermediates formed on radical cyclizations of ene-sulfonamides have been identified, reduction and hydration/fragmentation. Tin hydride-mediated cyclizations of 2-halo-N-(3-methyl-N-sulfonylindole)anilines provide spiro[indoline-3,3'-indolones] or spiro-3,3'-biindolines (derived from imine reduction), depending on the indole C2 substituent. Cyclizations of 2-haloanilide derivatives of 3-carboxy-N-sulfonyl-2