Electrophilic substitution in N-aryl-2-pyrazolines. 3. Introduction of nitro-, sulfo-, and acyl groups. Reaction with Michler's ketone
Abstract1-Phenyl-3,5-diaryl-2-pyrazolines are nitrated, sulfurated, and acylated in the para-position of the 1-phenyl ring. In the presence of POCl3, pyrazolines form triphenyl-methane dyes with a Michler's ketone.