作者:Teodozyj Kolasa、Sushil K. Sharma、Marvin J. Miller
DOI:10.1016/s0040-4020(01)86049-x
日期:——
prevent competitive reactions. The procedure allowed for direct formation of the α-chiral center of the newly formed α-N-hydroxyamino acid derivative. Introduction of potential chiral auxiliaries on the oxime oxygen resulted in modest diastereoselection. In most instances, use of chiral glyoxylamides also gave low diastereoselectivity.
有机锂试剂与乙醛酸衍生的肟的反应提供了直接通往α-N-羟基氨基酸的途径。该方法需要将可电离基团直接连接到乙醛酸羰基上,以防止竞争反应。该程序允许直接形成新形成的α-N-羟基氨基酸衍生物的α-手性中心。在肟氧上引入潜在的手性助剂导致适度的非对映选择性。在大多数情况下,使用手性乙醛酰胺还降低了非对映选择性。