Annulated 1,2,4-Triazoles. A Convenient Synthesis of Thieno[2,3-f][1,2,4]triazolo[1,5-a]azepines: A Novel Triheterocyclic Ring System - Wang, Quanrui; Li, Zheng; Yang, Haiyan; Li, Feng; Ding, Zongbiao; Tao, Fenggang (Synthesis, 2003)