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Free keywords:
asymmetric catalysis; benzidine rearrangement; hydrazines; organocatalysis; phosphoric acids
Abstract:
A chiral Brønsted acid catalyzes the asymmetric benzidine rearrangement of N,N′‐dinaphthylhydrazines. Different electronically and structurally diverse axially chiral 2,2′‐binaphthyl diamine (BINAM) derivatives are obtained with high enantioselectivity.