Abstract Electrochemical reduction in dimethylformamide of unsymmetrical 1-Cl-4-X- phthalazines and symmetrical 1, 4-X 2-phthalazines (X= Cl, PhO, MeO, EtO, i-PrO) was studied by voltammetry and electrolysis-ESR. The electron trasfer on 1, 4- dichlorophthalazine and unsymmetrical 1-Cl-4-X-phthalazines induces anionoid elimination of Cl and X, pyridazine ring cleavage, and phthalonitrile formation. In this previously ...
