In contrast with the reported phosphine- and DABCO-catalyzed [3 ＋ 2] and [2 ＋2] annulation of allenoates with trifluoromethylketone, the [2＋2＋2] annulation of allenoates and two molecules of trifluoromethylketone ...In contrast with the reported phosphine- and DABCO-catalyzed [3 ＋ 2] and [2 ＋2] annulation of allenoates with trifluoromethylketone, the [2＋2＋2] annulation of allenoates and two molecules of trifluoromethylketone was found under the condition of N-heterocyclic carbene catalysis.展开更多
文摘In contrast with the reported phosphine- and DABCO-catalyzed [3 ＋ 2] and [2 ＋2] annulation of allenoates with trifluoromethylketone, the [2＋2＋2] annulation of allenoates and two molecules of trifluoromethylketone was found under the condition of N-heterocyclic carbene catalysis.
