91226-65-2Relevant academic research and scientific papers
The Synthesis and Chemistry of Azolenines. Part 3. Some Reactions of 4H-Pyrazole Quaternary Salts
Katritzky, Alan R.,Lam, Jamshed N.,Rubio, Olga,Sammes, Michael P.
, p. 947 - 952 (2007/10/02)
The preparation of some novel 4H-pyrazolium salts is described.Unlike the structurally related 2H-imidazolium salts (1), the metho-salts (2) of 4H-pyrazoles show no exchange with deuterium at the N-methyl protons.Exchange occurs readily at a 5-methyl grou
