Direct photolysis and electron transfer photooxygenation of enol acetates of 3-phenylpropiophenones
摘要:
Direct photolysis of enol acetates of 3-phenylpropiophenones la-c gives rise to the parent propiophenones 2a-c and the 1,3-acyl shift products 3a-c. By contrast, 2,4,6-triphenylpyrylium tetrafluoroborate sensitized photolysis of substrates la-c affords the alpha-acetyloxypropiophenones 79-c as the most general products. These results have been rationalized according to the generation of radical pairs in the direct photolysis and radical cations in the photoinduced electron transfer processes.
Direct photolysis and electron transfer photooxygenation of enol acetates of 3-phenylpropiophenones
摘要:
Direct photolysis of enol acetates of 3-phenylpropiophenones la-c gives rise to the parent propiophenones 2a-c and the 1,3-acyl shift products 3a-c. By contrast, 2,4,6-triphenylpyrylium tetrafluoroborate sensitized photolysis of substrates la-c affords the alpha-acetyloxypropiophenones 79-c as the most general products. These results have been rationalized according to the generation of radical pairs in the direct photolysis and radical cations in the photoinduced electron transfer processes.
Direct photolysis and electron transfer photooxygenation of enol acetates of 3-phenylpropiophenones
作者:Felipe Algarra、Mar�a V. Baldov�、Hermenegildo Garc�a、Miguel A. Miranda、Jaime Primo
DOI:10.1007/bf00808680
日期:1993.2
Direct photolysis of enol acetates of 3-phenylpropiophenones la-c gives rise to the parent propiophenones 2a-c and the 1,3-acyl shift products 3a-c. By contrast, 2,4,6-triphenylpyrylium tetrafluoroborate sensitized photolysis of substrates la-c affords the alpha-acetyloxypropiophenones 79-c as the most general products. These results have been rationalized according to the generation of radical pairs in the direct photolysis and radical cations in the photoinduced electron transfer processes.