作者:Sobia Tabassum、Oksana Sereda、Peddiahgari Vasu Govardhana Reddy、René Wilhelm
DOI:10.1039/b908899g
日期:——
KHMDS and KOtBu are well established as strong, hindered, non-nucleophilic Brønsted bases. However, in the present work these bases are applied as highly active Lewis base catalysts for the formal [2+2] cycloaddition of ketenes with aldehydes and imines.