Abstract
The nitriles I reacted with acetylacetone and with ethyl acetoacetate to afford 2-amino-3-cyano-4H-pyran derivatives. They reacted further to yield pyranopyridine derivatives. The reaction of V with acetylacetone afforded the pyridinethione VIII. This afforded, reacting with aromatic aldehydes or with cinnamonitriles quinoline derivatives XVII.
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