Photoinduced Cyclization of 3-Acyl-2-halo-1-[(ω-phenylethynyl)alkyl]indoles to Azaheterocyclo[1,2,3-<i>lm</i>]-Fused Benzo[<i>c</i>]carbazoles
作者:Shenci Lu、Ren Wang、Yi Yang、Yang Li、Zongjun Shi、Wei Zhang、Zhifeng Tu
DOI:10.1021/jo200630x
日期:2011.7.15
3-lm]carbazole (3a–h), are produced in the photocyclization of 2-halo-1-[(ω-phenylethynyl)alkyl]indole-3-carbaldehydes (1a–h). In contrast, only products 2a–h are produced in the photocyclization of 3-acetyl-2-chloro-1-[(ω-phenylethynyl)alkyl]indole-3-carbaldehydes (1o–t). The 9-H in 3a–h (n = 2) does originate from the formyl group in 1a–h via 1,5-hydrogen shift. The structures of three new products, 9-bromo-7
One-Pot Synthesis of Fused Benzo[c]carbazoles by Photochemical Intramolecular Annulation of 3-Acyl-2-haloindoles with Tethered Styrenes
作者:Shen-Ci Lu、Shi-Chao Wei、Wei-Xia Wang、Wei Zhang、Zhi-Feng Tu
DOI:10.1002/ejoc.201100876
日期:2011.10
the synthesis of fusedbenzo[c]carbazoles has been achieved in moderate to high yields by the one-potphotochemicalannulation of 3-acyl-2-haloindoles with tetheredstyrenes by photoinduced electron-transfer coupling, electrocyclic reactions, and deacylative aromatization in the presence of pyridine. Fused furo[2,3-c]carbazoles were also synthesized under the same conditions. 5,6-Dihydrobenzo[c]pyrrolo[1