Asymmetric Synthesis of All Stereoisomers of α-Methylthreonine Using an Organocatalytic Steglich Rearrangement Reaction as a Key Step
作者:Harald Gröger、Friedrich Dietz
DOI:10.1055/s-0029-1217140
日期:——
An efficient synthetic route to all four stereoisomers of α-methylthreonine has been established. Each type of stereoisomer has been isolated in diastereomerically pure form and with an enantiomeric excess of at least 86% ee. The key step in this multi-step synthesis is an enantioselective organocatalytic Steglich rearrangement reaction of O-acetylated azlactones. The Steglich rearrangement was also
已经建立了针对α-甲基苏氨酸的所有四个立体异构体的有效合成途径。每种类型的立体异构体均已以非对映体纯的形式分离,对映体过量至少为86%ee。该多步合成中的关键步骤是O-乙酰化a内酯的对映选择性有机催化Steglich重排反应。Steglich重排也扩展到其他基板。 酰化-氨基酸-不对称催化-重排-立体选择性合成