Reaction of Heterocyclic Ketene Aminals with Bis(methylthio)methylene Malononitrile: Synthesis of Polyfunctionalized Pyridine-Fused 1,3-Diaza-heterocycles from Heterocyclic Ketene Aminals - Liao, Jiang-Peng; Zhang, Ti; Yu, Chu-Yi; Huang, Zhi-Tang (Synlett, 2007)