Hindered Brønsted bases as Lewis base catalysts.
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.
Tabassum
Sobia
S
Institute of Organic Chemistry, Clausthal University of Technology, Leibnizstr. 6, 38678 Clausthal-Zellerfeld, Germany.
Sereda
Oksana
O
Reddy
Peddiahgari Vasu Govardhana
PV
Wilhelm
René
R