Phosphine catalyzed enantioselective [3+2] cyclizations on 4-substituted 2,6-diarylidenecyclohexanones and 2,4-diarylidene-bicyclo[3.1.0]hexan-3-ones take place with high diastereo- and enantioselectivity levels. The process affords spirocyclic compounds with excellent stereochemical control of up to five stereogenic centres.
磷烯催化的立体选择性[3+2]环化反应在4-取代的2,6-二芳基
环己酮和2,4-二芳基双环[3.1.0]己酮-3-酮上进行,具有高的非对映选择性和对映选择性。该过程产生的螺旋化合物具有优异的立体
化学控制,最多可达到五个立体中心。