Methylheteroaromatic Carbonitriles as Building Blocks for Synthesis of Condensed Heteroaromatics: Novel Syntheses of [1]Benzo[2,3]pyrano[3,4-c]pyridines, Naphtho[2′,1′:5,6]pyrano[3,4-c]pyridines, Pyrido[3,4-c]quinolines and Other New Condensed Pyridines
Abstract
A variety of condensed pyridines were prepared via condensing alkylheteroaromatic carbonitriles with N,N-dimethylformamide dimethylacetal and subsequent cyclization of the formed products.