N‐heterocyclic carbene ligands have been identified as efficient catalysts for the chemoselective racemization of axially chiral allenyl alcohols. In combination with porcine pancreatic lipase as biocatalyst, a dynamic kinetic resolution has been developed, giving access to optically active allenes in good yield and high enantiomeric purity (see scheme).
在
钯:带有单齿N-杂环卡宾
配体的二聚
溴化钯配合物已被确认为轴向手性烯基醇
化学选择性外消旋的有效催化剂。结合猪胰
脂肪酶作为
生物催化剂,已经开发出动态动力学拆分方法,可以以高收率和高对映体纯度获得旋光性
丙二烯(参见方案)。