Fused pyridine derivativesFused pyridine derivatives R 0450 Regioselective Heteroanellation in 4-Cyanomethyl-3,5-pyridinedicarbonitriles. Synthesis of 6-Alkoxy-3-dialkylamino-1,8-diamino-2,7-naphthyridine-4-carbonitriles. -Treatment of nitriles (III) with alkoxides leads to the title alkoxy compounds, e.g. (V) as sole products. -(TVERDOKHLEBOV*, A. V.; RESNYANSKA, E. V.; TOLMACHEV, A. A.; ZAVADA, A. V.; Monatsh. Chem. 134 (2003) 7, 1045-1052; Taras Shevchenko Univ., Kiev 252033, Ukraine; Eng.) -M. Bohle 43-128