transformed into sterically hindered chiral N-heterocyclic carbene (NHC) precursors, which are otherwise difficult to access. The usefulness of this synthetic approach was further demonstrated by the successful application of one of the chiral vicinal diamines and chiral NHC ligands in a transition-metal-catalyzed asymmetric Suzuki-Miyaura cross-coupling reaction and asymmetric ring-opening cross-metathesis
已经开发出具有2-
喹啉醛和芳族胺的高度对映选择性的
铱或
钌催化的分子间还原胺化/不对称氢化继电器。以高收率(高达95%)和出色的对映选择性(高达> 99%ee)获得了范围广泛的空间可调性手性N,N'-二芳基邻位二胺。所得的手性二胺很容易转化为空间受阻的手性N-杂环卡宾(NHC)前体,否则很难获得。通过将手性邻位二胺和手性NHC
配体之一分别成功应用在过渡
金属催化的不对称Suzuki-Miyaura交叉偶联反应和不对称开环交叉复分解中,进一步证明了这种合成方法的有效性。