Axially Chiral Anilido–Aldimine Aluminum Complexes with a Pseudobinaphthyl Skeleton

Abstract Axially chiral anilido–aldimine aluminum complexes with a pseudobinaphthyl skeleton 3a and 3b have been prepared. X-ray analysis indicates that complex 3b adopts a conformation similar to that of 1,1′-binaphthyls. The racemization barrier of 3a was determined to be 23.0 kcal mol−1, which was higher by ca. 4 kcal mol−1 than the corresponding diarylamine precursor with an N–H–N hydrogen bond.