172879-50-4Relevant articles and documents
Vicarious nucleophilic substitution of pyridazinium N-dicyanomethylides
Itoh, Takashi,Matsuya, Yuji,Nagata, Kazuhiro,Miyazaki, Michiko,Tsutsumi, Nozomi,Ohsawa, Akio
, p. 1637 - 1641 (2007/10/03)
Pyridazines have been allowed to react with tetracyanoethylene oxide to give pyridazinium N-dicyanomethylides, which are subjected to vicarious nucleophilic substitution to afford the corresponding 4-substituted derivatives in moderate to good yields. The dicyanomethylene group is readily eliminated by a radical reaction, and 4-substituted pyridazines are obtained.