Collect. Czech. Chem. Commun. 1988, 53, 1297-1301

Synthesis of pyridazines via furan vinamidinium salts

Tibor Graczaa, Zdeněk Arnoldb and Jaroslav Kováča

a Department of Organic Chemistry, Slovak Institute of Technology, 812 37 Bratislava
b Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Sciences, 166 10 Prague 6


Reaction of 5-(N,N-dimethylamino)-2-furfurylidene-N,N-dimethyliminium bromide (I) with hydrazine affords 3-hydrazono-2,3,4,5-tetrahydro-6-methylenehydrazonopyridazine (III). 5-(N,N-Dialkylamino)-2-arylazofuran salts II react with the same reagent to give 3,6-disubstituted pyridazines V. The structure of the synthesized compounds was identified by 1H NMR and mass spectra.