Three-component synthesis of N-naphthyl pyrazoles via Rh(iii)-catalyzed cascade pyrazole annulation and Satoh–Miura benzannulation

Abstract

The synthesis of N-naphthyl pyrazoles has been realized by the direct three-component reactions of enaminones, aryl hydrazine hydrochlorides and internal alkynes via Rh(III) catalysis. The synthetic reactions employing simple substrates lead to simultaneous construction of dual cyclic moieties, including a pyrazole ring and a phenyl ring, via sequential formation of two C–N and three C–C bonds.