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 electron donor-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
2,2-二芳基-1-亚甲基环丙烷、1,1,2,2-四芳基环丙烷、2,3-二芳基环氧乙烷或 2,3-二芳基氮丙啶与四氰基乙烯 (TCNE) 的电子供体-受体 (EDA) 配合物的辐照曝气条件涉及氧化和/或与 TCNE 的 (3 + 2) 环加成。当 2,2-二芳基-1-亚甲基环丙烷或 1,1,2,2-四芳基环丙烷与 TCNE 的 EDA 配合物在氧饱和溶剂中简单搅拌时,同样的氧化发生在黑暗中。随着溶剂极性和供体底物的给电子性质的增加,氧化发生得更有效。用作猝灭剂的 1,2,4,5-四甲氧基苯 (TMB) 有效地抑制了氧化,但根本没有抑制 (3 + 2) 环加成。