A highly enantioselective trapping of protic phosphoramidate ammonium ylides with α-imino esters is reported. The intriguing Rh2(OAc)4 and chiral Brønsted acid co-catalyzed three-component Mannich-type reaction of a diazo compound, a phosphoramidate, and an α-imino ester provides a rapid and efficient access to 2,3-diaminosuccinic acid derivatives with a high level control of diastereo- and enantioselectivity.
据报道,原生
磷酰胺
铵酰化物与 α-imino 酯的对映选择性很高。Rh2(OAc)4 和手性布伦斯特酸共同催化了重氮化合物、
磷酰胺和 α-
亚胺酯的三组分曼尼希式反应,这种有趣的反应为 2,3-二
氨基
丁二酸衍
生物的制备提供了快速高效的途径,并且具有高度的非对映和对映选择性控制。