Studies on enamides Part-21:A novel photochemical synthesis of 9H-indolo [3,2,1-de] phenanthridin-9-one, a benzcanthine analogue
作者:Somnath Ghosh、Diptendu Bhusan Datta、Indira Datta、Tapas Kumar Das
DOI:10.1016/s0040-4020(01)89239-5
日期:1989.1
The synthesis of 3-aroylcarbazoles [(a-d)] and the unknown 1-aroylcarbazoles [(a-c)] been achieved by the photolysis of 9-aroylcarbazoles [(a-d)] in polar solvent. Irradiation of (a-c) in non-polar solvent afforded regiospecifically (a-c), carbazole () and for the first time, 9H-indolo [3, 2, 1-de] phenanthridin-9-one () from b. The yield of was significantly improved by UV exposure of 9-(2-iodobenzoyl)-carbazole
3-芳酰基咔唑[ (ad)]和未知的1-芳酰基咔唑[ (ac)]的合成是通过9-芳酰基咔唑[ (ad)]在极性溶剂中的光解而实现的。在非极性溶剂中照射(ac),可以从区域上特异性地(ac)提供咔唑(),并首次从b中获得9H-吲哚并[3,2,1-de]菲啶9-one(1 )。通过将9-(2-碘苯甲酰基)-咔唑(e)在甲醇和碘中进行UV暴露,无需提供任何光迁移的产物,即可显着提高其产率。