chiral bisoxazoline ligands with four asymmetric centers were readily synthesized from the two enantiomers of tartaric acid and several aminoacids via the corresponding bis(β-hydroxylamide)s and dimesylates as successive intermediates. With these novel chiral bisoxazoline ligands, rhodium(I)-catalyzed hydrosilylation of acetophenone was carried out and the effects of the combination of the four asymmetric
                                    由
酒石酸和几种
氨基酸的两个对映异构体通过相应的双(β-羟酰胺)和二甲基化作为连续的中间体,可以轻松合成具有四个不对称中心的新型C 2对称手性双
恶唑啉
配体。用这些新颖的手性双
恶唑啉
配体,进行了
铑(I)催化的
苯乙酮的氢化
硅烷化反应,研究了四个不对称中心的结合以及
配体在
恶唑啉环上的取代基对反应的影响。