A new efficient diastereo- and enantioselective synthesis of α-amino-γ-oxo acid esters by reaction of acyliminoacetates with enamines is described. By employing the concept of double stereodifferentiation, complete asymmetric induction (de ≧99.9%) for the C-C bond formation is obtained. Desulphurization of a sulphur containing product leads to the corresponding acyclic amino acid derivatives. The
描述了一种新的有效的非对映体和对映体选择性合成的方法,该方法通过酰
氨基
乙酸酯与烯胺的反应来合成α-
氨基-γ-氧代酸酯。通过采用双重立体分化的概念,获得了用于CC键形成的完全不对称诱导(de≥99.9%)。含
硫产物的脱
硫产生相应的无环
氨基酸衍
生物。几乎完整的反非对映选择性和对映选择性是由Diels-Alder过渡态解释的。