Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606‐8502 (Japan), Fax: (+81)?75‐753‐4041
Abstract:
It′s a PTC : A highly efficient reaction of 3‐aryloxindoles in an asymmetric Michael addition was achieved by using a quaternary tetraalkylphosphonium salt as a chiral phase‐transfer catalyst (PTC). The products were obtained in quantitative yields high ee values. The reaction of 3‐aryloxindoles in an asymmetric Mannich reaction using the same catalyst also proved to be feasible.
