The development of highly stereoselective asymmetric reactions using organocatalysts has become a research area of great importance, and a number of new organocatalysts have been devised for this purpose. 1 Accordingly, we already designed several binaphthyl-based secondary amine catalysts for aldol and other reactions involving enamine intermediates in their transition state. 2 Among them, chiral binaphthyl-based amino sulfonamide (S)-1 showed excellent ...
