Construction of Novel Tricyclic Fused-Ring Systems by the Multicomponent Reactions of Imidazo[1,5-a]pyridine Carbenes with Aromatic ortho-Dialdehydes and Electron-Deficient Alkynes - Yan, Cai-Xia; Sun, Zhong-Xin; Cheng, Ying (Synthesis, 2012)