Abstract ( S )‐(−)‐α‐(1‐naphthyl)ethylamine product: ( S )‐(−)‐α‐(1‐ Naphthyl)ethylamine reactant: 58.44 g. (0.1849 mole) of (−)‐2,3:4,6‐di‐ O ‐isopropylidene‐2‐keto‐ L ‐gulonic acid hydrate [(−)‐DAG] reactant: 34.24 g. (0.2002 mole) of racemic α‐(1‐naphthyl)ethylamine intermediate: (−)‐amine (−)‐DAG