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