Claisen Rearrangement through Enolization of 2-Allyloxyindolin-3-ones: Construction of Adjacent Carbon Stereocenters in 3-Hydroxyindolin-2-ones - Higuchi, Kazuhiro; Saito, Keita; Hirayama, Tetsuya; Watanabe, Yoshiaki; Kobayashi, Emiko; Kawasaki, Tomomi (Synthesis, 2010)