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 fused benzo[c]carbazoles has been achieved in moderate to high yields by the one-pot photochemical annulation of 3-acyl-2-haloindoles with tethered styrenes 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
3-酰基-2-卤代吲哚与系留苯乙烯的一锅光化学环化反应,通过光诱导电子转移偶联、电环反应和高产率合成稠合苯并[c]咔唑的有效方法。在吡啶存在下进行脱酰基芳构化。稠合呋喃[2,3-c]咔唑也在相同条件下合成。5,6-二氢苯并[c]吡咯并[1,2,3-lm]咔唑通过DDQ氧化得到芳香苯并[c]吡咯并[1,2,3-lm]咔唑产物,产率中等至高。