Chemoenzymatic Synthesis of Racemic and Enantiomerically Pure Phosphaaspartic Acid and Phosphaarginine
作者:Renzhe Qian、Edyta Kuliszewska、Elena Macoratti、Friedrich Hammerschmidt
DOI:10.1002/ejoc.201700948
日期:2017.9.1
Chloroacetylation delivered an ester, which was resolved in a two-phase system by using the lipase from Thermomyces lanuginosus. Racemic and (S)-α-hydroxyphosphonate 6 were converted to (±)- and (R)-phosphaaspartic acid by functional-group manipulation. (±)-, (R)- and (S)-6 were first esterified with 4-nitrobenzenesulfonyl chloride before hydroboration to transform the double bond into a hydroxyethyl group. The hydroxyl
将通过一锅法制备的二异丙基烯丙氧基甲基膦酸酯异构化,通过 [2,3]-σ 重排得到具有 LDA 的外消旋 1-羟基-3-丁烯基膦酸酯。氯乙酰化产生一种酯,该酯通过使用来自疏毛嗜热丝孢菌的脂肪酶在两相系统中分解。通过官能团操作,外消旋和 (S)-α-羟基膦酸酯 6 被转化为 (±)- 和 (R)-磷酸天冬氨酸。(±)-、(R)-和(S)-6首先用4-硝基苯磺酰氯酯化,然后硼氢化以将双键转化为羟乙基。操纵羟基得到胍基,操纵4-硝基苯磺酰氧基得到氨基。α-氨基膦酸酯的整体脱保护产生了所需的磷酸氨基酸。