Irradiation of aryl esters of N-hydroxyphthalimides in the presence of unactivated olefins promotes a mild and regioselective hydroesterification. Optimal results are obtained with the aid of fac-Ir(dFppy)3 in CH2Cl2. Terminal and 1,1-disubstituted olefins provide primary esters, and trisubstituted olefins provide secondary esters. The anti-Markovnikov selectivity is consistent with alkyl radical intermediates
在未活化烯烃存在下辐照N-羟基邻苯二甲
酰亚胺的芳基酯可促进温和的区域选择性加氢酯化。借助fac -Ir(dFppy) 3在 CH 2 Cl 2中获得最佳结果。末端和 1,1-二取代烯烃提供伯酯,三取代烯烃提供仲酯。抗马尔科夫尼科夫选择性与烷基自由基中间体一致,这也表明从二烯形成环化产物。单酰化二醇在
水存在下由三取代和四取代烯烃形成。