作者:Ling Ke-Qing、Ji Gang、Cai Hu、Xu Jian-Hua
DOI:10.1016/s0040-4039(98)00344-x
日期:1998.4
(RB) in methanol or by tetraphenylporphin (TPP) in the presence of pyridine as a base and a cosolvent in benzene. The products are the corresponding 1,3,4-isoquinolinetriones 2a-2e and methyl 1-hydroxy-3-oxoisoindole-1-carboxylates 3b-3e in methanol and the triketones 2a-2e and the 3-hydroxy-3-alkyl (aryl)aminocarbonylbenzoisofuran-1-ones 4b-4e in benzene-pyridine. TPP sensitized photooxygenations of the
1,3-异喹啉二酮1a-1e的单线态氧反应可通过阴离子敏化剂Rose Bengal(RB)在甲醇中或四苯基卟啉(TPP)在吡啶作为碱和在苯中的助溶剂存在下进行敏化。产物是在甲醇中的相应1,3,4-异喹啉三酮2a-2e和1-羟基-3-氧代异吲哚-1-羧酸甲酯3b-3e以及三酮2a-2e和3-羟基-3-烷基(芳基)在苯吡啶中的氨基羰基苯并异呋喃-1-酮4b-4e。TPP对4-烷基化的1,3-异喹啉二酮5a-5c进行光氧化可得到4-烷基-4-羟基-1,3-异喹啉二酮6a-6c,4-烷基-4-氢过氧-1,3-异喹啉二酮7a-7c和3-烷基-3-羟基苯并异呋喃-1-酮8a-8b。已经提出了反应机理。