Pyridine → 6-amino-2-methylpyridazine-3(2H)-thione

Participants

Reaction Steps

Pyridine (5 ml) and a Lawesson's reagent (970 mg, 2.4 mmol) were added to 3-amino-1-methyl-1,6-dihydropyridazin-6-one (500 mg, 4 mmol) as described in Journal of Medicinal Chemistry, 34 (10), 3074 (1991), and the mixture was refluxed under heating for 5 hours. The reaction mixture was concentrated and the residue obtained was subjected to silica gel column chromatography (chloroform:methanol=100:1) to give 218 mg of 3-amino-1-methyl-1,6-dihydropyridazine-6-thione.

Provenance & Evidence