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Synthesis of a Biphenyl-Based Axially Chiral Amino Acid as a Highly Efficient Catalyst for the Direct Asymmetric Aldol Reaction.

✍ Scribed by Taichi Kano; Osamu Tokuda; Keiji Maruoka

Publisher
John Wiley and Sons
Year
2007
Weight
30 KB
Volume
38
Category
Article
ISSN
0931-7597

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## Abstract **Amino sulfonamide catalyst**: A distal proton of the axially chiral amino sulfonamide (__S__)‐**1** realized the opposite diastereoselectivity in Mannich and cross‐aldol reactions compared with that observed in proline‐catalyzed reactions. The reactions catalyzed by (__S__)‐**1** proc