Low-Valent Titanium Reagent-Promoted Intramolecular Reductive Coupling Reactions of Ketomalononitriles: A Facile Synthesis of Benzo[4,5]indene, Acridine and Quinoline Derivatives - Shi, Daqing; Rong, Liangce; Shi, Chunling; Zhuang, Qiya; Wang, Xiangshan; Tu, Shujiang; Hu, Hongwen (Synthesis, 2005)