enantioselective reductive amination and amidation cascade reaction has been developed. Catalyzed by iridium or rhodium complexes and with the help of sets of additives, the coupling of simple alkyl diamines and α-ketoesters occurs smoothly to afford the chiral cyclic piperazinone products. For disubstituted and monosubstituted alkyl diamine substrates, the corresponding reactions proceed through distinctive types
开发了一种有效的对映选择性还原胺化和酰胺化级联反应。在
铱或
铑络合物的催化下,在一系列添加剂的帮助下,简单的烷基二胺与α-
酮酯的偶联反应顺利,得到手性环状
哌嗪酮产物。对于双取代和单取代的烷基二胺底物,相应的反应通过不同类型的中间体进行,因此需要不同的过渡
金属来实现高对映选择性,即前者为
铱,后者为
铑。在这种转化中,所应用的高度模块化的亚
磷酰胺-膦杂化
配体显示出卓越的多功能性和可调性。