Transition-Metal-Free N-Arylation of Pyrazoles with Diaryliodonium Salts

Gonda, Zsombor and Novák, Zoltán (2015) Transition-Metal-Free N-Arylation of Pyrazoles with Diaryliodonium Salts. Chemistry a european journal.

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Abstract

A new synthetic method was developed for the N-arylation of pyrazoles using diaryliodonium salts. The transformation does not require any transition-metal catalyst and provides the desired N-arylpyrazoles rapidly under mild reaction condition in the presence of aqueous ammonia solution as a mild base without the use of inert atmosphere. The chemoselectivity of unsymmetric diaryliodonium salts was also explored with large number of examples.

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