Cu(i)-catalyzed asymmetric Michael addition of cyclic ketimino esters with alkylidene malonates has been developed for efficient construction of β-branched α-amino acids containing adjacent quaternary and tertiary stereogenic centers in good yields with excellent diastereo-/enantioselectivities.
通过Cu(i)-催化的不对称Michael加成反应,将环状酮亚胺酯与烯丙基丙二酸酯反应,可以高效地构建含有邻位四手性和三手性立体中心的β-支链α-氨基酸,产率高,二对映选择性和对映选择性优异。