Enantioselective construction of spirodihydrofuran oxindoles via one-pot organo-/iodine sequential catalysis†
Abstract
A highly efficient strategy was first developed for the enantioselective construction of spirodihydrofuran oxindoles via a one-pot Michael/iodization/SN2 nucleophilic substitution sequence. The reaction features easy operation and a transition-metal free process, and delivers spirodihydrofuran oxindoles with two adjacent tetrasubstituted carbon stereocenters.