Abstract
Reaction of α, α'-dimethylthiomethylene-2-pyridylacetonitrile (I) and active methylene compounds in dimethyl sulfoxide, in the presence of potassium carbonate, afforded 1-cyano-2-methylthio-4H-quinolizin-4-ones with the corresponding substituent in 3-position. Reaction of some of these 3-substituted compounds with benzylamine produced 2-benzylamino-1-cyano-4H-quinolizin-4-ones. Reduction of one of the 3-substituted compound over Raney nickel catalyst gave 1-cyano-3β-pyridyl-4H-quinolizin-4-one.
