21399-30-4

Upstream product

• 33170-68-2 1,3-bis-(4-bromo-phenyl)-propane-1,3-dione 
• 586-75-4 4-chlorobenzoyl chloride 
• 1122-91-4 4-bromo-benzaldehyde 
• 99-90-1 para-bromoacetophenone 
• 5471-96-5 1,3-bis(4-bromophenyl)-2-propen-1-one 

Relevant academic research and scientific papers

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

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.