A bridge connects and efficiently transfers the chirality from the backbone of a N‐heterocyclic carbene (NHC) to the metal center. The result is excellent enantioselectivities in the ruthenium‐catalyzed, asymmetric ring‐opening cross‐metathesis of norbornenes with allyltrimethylsilane (see scheme).
桥连接并有效地将手性从N杂环卡宾(NHC)的骨架传递到
金属中心。结果是
降冰片烯与烯丙基三甲基
硅烷在
钌催化的不对称开环交叉复分解中具有出色的对映选择性(参见方案)。