Several α-alkylated β-amino esters have been obtained via DKR processes employing a kit of transaminases and isopropylamine as an amino donor in aqueous medium under mild conditions. Thus, while acyclic α-alkyl-β-keto esters afforded excellent conversions and enantioselectivities, although usually low diastereoselectivities, using more constrained cyclic β-keto esters high to excellent inductions were obtained.
通过使用一套转
氨酶和
异丙胺作为
氨基供体,在温和条件下的
水相介质中,已获得几种α-烷基化β-
氨基酯。这些非环状α-烷基-β-
酮酯表现出优异的转化率和对映选择性,尽管通常具有较低的非对映选择性。然而,使用更受限的环状β-
酮酯时,获得了高至优异的诱导效果。