Abstract
The reactions of the methosulfates of pyridazines with KCN were carried out. Pyridazine (Ia), 3-methyl-and 3-methoxy-pyridazine (Ib and Ic) afforded two kinds of dimers (II and III), respectively. 3-Phenylpyridazine (Ih-j) afforded 4-cyano-1, 4-dihydro compounds (XIV) as main products, along with small amounts of various kinds of cyano substituted monomers. Other kinds of pyridazines (Id, f, g, and k) did not afford II, III, and XIV, but various kinds of monomers (IV, V, VI, VII, VIII, IX, XV, and XVI) in general. The mechanisms of their formations were also discussed.
