Asymmetric Synthesis of <i>anti</i>-β-Amino-α-Hydroxy Esters via Dynamic Kinetic Resolution of β-Amino-α-Keto Esters
作者:C. Guy Goodman、Dung T. Do、Jeffrey S. Johnson
DOI:10.1021/ol4009206
日期:2013.5.17
method for the asymmetric synthesis of enantioenriched anti-α-hydroxy-β-amino acid derivatives by enantioconvergent reduction of the corresponding racemic α-keto esters is presented. The requisite α-keto esters are prepared via Mannich addition of ethyl diazoacetate to imines followed by oxidation of the diazo group with Oxone. Implementation of a recently developed dynamic kinetic resolution of β-substituted-α-keto
提出了一种通过对映体聚合还原相应的外消旋 α-酮酯来不对称合成富含对映体的抗-α-羟基-β-氨基酸衍生物的方法。通过重氮乙酸乙酯与亚胺的曼尼希加成,然后用 Oxone 氧化重氮基团来制备必需的 α-酮酯。通过 Ru(II) 催化的不对称转移氢化实现了最近开发的 β-取代-α-酮酯的动态动力学拆分,提供了具有常规高非对映选择性和对映选择性的标题基序。