Synthesis of Pseudo-<i>geminal</i>-, Pseudo-<i>ortho</i>-, and <i>ortho-</i>Phosphinyl-oxazolinyl-[2.2]paracyclophanes for Use as Ligands in Asymmetric Catalysis
作者:Daniel K. Whelligan、Carsten Bolm
DOI:10.1021/jo060668h
日期:2006.6.1
three regioisomers of aromatic-substituted phosphinyl-oxazolinyl-[2.2]paracyclophanes, pseudo-geminal, pseudo-ortho, and ortho, have been carried out or, in the latter two cases, newly developed. It has, therefore, been demonstrated that all aromatic-substituted isomers relevant for use as chelating ligands for asymmetric catalysis are accessible. These P,N-ligands, along with their diastereoisomers
已进行了芳族取代的膦基-恶唑啉基-[2.2]对环环烷的三种区域异构体的合成,即假双子,假邻或邻。因此,已经证明所有与用作不对称催化的螯合配体有关的芳族取代的异构体都是可及的。这些P,N配体以及它们的非对映异构体在Pd催化的不对称烯丙基烷基化反应中表现出很大的活性和对映选择性(最高89%ee)。