Organic photochemistry. 77. Simultaneous capture of two distinct radical-ion intermediates generated from the EDA complexes of three-membered compounds with TCNE by photoexcitation and in the dark
作者:Tsutomu Miyashi、Masaki Kamata、Toshio Mukai
DOI:10.1021/ja00243a035
日期:1987.4
Irradiation of the electrondonor-acceptor (EDA) complexes of 2,2-diaryl-1-methylenecyclopropanes, 1,1,2,2-tetraarylcyclopropanes, 2,3-diaryloxiranes, or 2,3-diarylaziridines with tetracyanoethylene (TCNE) under aerated conditions involved oxygenation and/or the (3 + 2) cycloaddition with TCNE. The same oxygenation took place in the dark when the EDA complexes of 2,2-diaryl-1-methylenecyclopropanes
[3+2] Photooxygenation of aryl cyclopropanes via visible light photocatalysis
作者:Zhan Lu、Jonathan D. Parrish、Tehshik P. Yoon
DOI:10.1016/j.tet.2014.02.045
日期:2014.7
We report that Ru(bpz)32+ is an excellent sensitizer for the photooxygenation of aryl cyclopropanes upon irradiation with visible light. The effectiveness of this photocatalyst enables the synthesis of a range of five-membered endoperoxides in excellent yield with quite low (0.5 mol %) catalyst loadings even when standard household light sources are utilized.