Synthesis of Tridentate Chiral Spiro Aminophosphine−Oxazoline Ligands and Application to Asymmetric Hydrogenation of α‐Keto Amides
作者:Feng‐Hua Zhang、Chen Wang、Jian‐Hua Xie、Qi‐Lin Zhou
DOI:10.1002/adsc.201900251
日期:2019.6.18
A new type of tridentate chiral spiro aminophosphine−oxazoline ligands (SpiroOAP) have been synthesized through four steps. The SpiroOAP ligands are highly efficient for the asymmetric hydrogenation of α‐keto amides, providing a variety of synthetically useful α‐hydroxy amides with excellent enantioselectivity (up to 98% ee) and turnover numbers (up to 10,000).
通过四个步骤合成了一种新型的三齿手性螺氨基氨基膦-恶唑啉配体(SpiroOAP)。SpiroOAP配体对于α-酮酰胺的不对称加氢非常有效,可提供多种合成有用的α-羟基酰胺,具有出色的对映选择性(最高98%ee)和周转率(最高10,000)。