A Concise Synthesis of Benzo[h]- and Pyrido[3,2-h]-δ-carbolin-2,4-diones from One-Pot Reaction of β-Lactam Carbenes with Naphthyl and Quinolyl Isonitriles - Shi, Gao-Feng; Kang, Zhi-Mei; Jiang, Xiao-Ping; Cheng, Ying (Synthesis, 2008)