The review summarizes for the first time the poorly studied electrooxidative functionalization of pyrazole derivatives leading to the C-Cl, C-Br, C-I, C-S and N-N coupling products with applied properties. The introduction discusses some aspects of aromatic hydrogen substitution. Further, we mainly consider our works on effective synthesis of the corresponding halogeno, thiocyanato and azo compounds using cheap, affordable and environmentally promising electric currents.
Keywords: C–H halogenation; C–H thiocyanation; N–N coupling; aromatic substitution; cyclic voltammetry; electrooxidation; pyrazoles; pyrazolo[1,5-a]pyrimidines.