A Powerful Hydrogen‐Bond‐Donating Organocatalyst for the Enantioselective Intramolecular Oxa‐Michael Reaction of α, β‐Unsaturated Amides and Esters1. (27th August 2013) - Kobayashi, Yusuke; Taniguchi, Yamato; Hayama, Noboru; Inokuma, Tsubasa; Takemoto, Yoshiji