Remarkable generality in scope of new C9-benzoylcupreines bearing electron-withdrawing substituents for the nitroaldol condensation with fluoromethyl ketones is presented. Both tri- and difluoromethyl ketones provided excellent levels of stereoinduction (ee 76–99%) under mild reaction conditions and low loading of catalyst (1–5 mol%).
展示了新型C9-
苯甲酰杯
芳烃在与
氟甲基酮进行硝基醇缩合反应中具有显著的一般性,其含有电子吸引取代基。在温和的反应条件和低
催化剂用量(1-5摩尔%)下,三
氟甲基和二
氟甲基酮均提供了优异的立体诱导
水平(光学纯度ee 76-99%)。