Rh-Catalyzed aminative dearomatization of 2-naphthols

Abstract

A direct aminative dearomatization of 2-naphthols was achieved. In the presence of 1 mol% Rh₂(esp)₂ and 3 equivalents of O-(2,4-dinitrophenyl)hydroxylamine (DPH) as readily available aminating reagents, the reactions of 2-naphthols afforded unprotected α-amino-β-naphthalenones in good yields under mild reaction conditions. The conditions were compatible with gram-scale reaction, and the product could undergo diverse transformations.