trichlorosilyl enolates derived from chiral ethyl ketones bearing a beta-hydroxyl group and an alpha-stereogenic center were employed in the phosphoramide-catalyzed aldol reaction. The addition of Z-enolates to achiral aldehydes produced aldol products in good yields and high syn relative diastereoselectivities. The internal diastereoselectivity is controlled by the catalyst configuration, allowing for
衍生自带有β-羟基和α-立体异构中心的手性乙基酮的三
氯甲
硅烷基烯醇化物用于
磷酰胺催化的醛醇缩合反应。向非手性醛中添加Z-烯醇盐以高收率和高同构非对映选择性生产醛醇产物。内部非对映选择性是由催化剂的构型控制的,从而可以选择性地形成任何一种非对映异构体。[反应:看文字]