The 2-aryl-6,8-dibromoquinolin-4(1 H)-ones were subjected to site-selective Sonogashira cross-coupling with terminal acetylenes as models for C sp2-C sp bond formation in the presence of Pd/C–PPh3 and CuI as catalysts and K2CO3 as a base in dioxane to afford the 2-substituted 4-aryl-8-bromo-4 H-pyrrolo[3,2,1- ij]quinolin-6-ones. These were, in turn, subjected to Suzuki–Miyaura cross-coupling with 4-fluorophenylboronic acid as coupling partner to afford the 2-substituted 4,8-diaryl-4 H-pyrrolo[3,2,1- ij]quinolin-6-ones.
2- 芳基-6,8-二溴喹啉-4(1 H)-酮在二噁烷中,以 Pd/C-PPh3 和 CuI 为催化剂,以 K2CO3 为碱的存在下,与作为 C sp2-C sp 键形成模型的末端乙炔进行位点选择性 Sonogashira 交叉偶联,得到 2-取代的 4- 芳基-8-溴-4 H-吡咯并[3,2,1-ij]喹啉-6-酮。然后,以 4-氟苯硼酸为偶联剂,对这些化合物进行 Suzuki-Miyaura 交叉偶联,得到 2-取代的 4,8-二芳基-4H-吡咯并[3,2,1-ij]喹啉-6-酮。