Biotransformations of 2-hydroxy-2-(ethoxyphenylphosphinyl)acetic acid and the determination of the absolute configuration of all isomers
作者:Paulina Majewska
DOI:10.1016/j.bioorg.2015.05.006
日期:2015.8
as biocatalysts. In all cases the reaction was more or less stereoselective and isomers bearing a phosphorus atom with an (SP)-configuration were hydrolyzed preferentially. The observed 1H and 31P NMR chemical shifts of Mosher esters of 2-hydroxy-2-(ethoxyphenylphosphinyl)acetic acid were correlated with the configurations of both stereogenic centers of all four stereoisomers.
研究了2-羟基-2-(乙氧基苯基亚膦酰基)乙酸,一种具有两个立构中心的新型有机磷化合物。外消旋的2-丁酰氧基-2-(乙氧基苯基亚膦酰基)乙酸被合成并使用四种细菌作为生物催化剂进行水解。在所有情况下,反应或多或少是立体选择性的,并且带有(S P)-构型的磷原子的异构体被优先水解。观察到的2-羟基-2-(乙氧基苯基亚膦酰基)乙酸的莫世尔酯的1 H和31 P NMR化学位移与所有四个立体异构体的两个立体中心的构型相关。
Lipases and whole cell biotransformations of 2-hydroxy-2-(ethoxyphenylphosphinyl)acetic acid and its ester
wide spectrum of commercially available lipases and microbial whole cells catalysts were tested for biotransformations of 2-hydroxy-2-(ethoxyphenylphosphinyl)acetic acid 1 and its butyryl ester. The best results were achieved for biocatalytic hydrolysis of ester: 2-butyryloxy-2-(ethoxyphenylphosphinyl)acetic acid 2 performed by lipase from Candidacylindracea, what gave optically active products with
Hydroxyphosphinylacetic acid as a chiral auxiliary compound
作者:Paulina Majewska
DOI:10.1080/10426507.2018.1547724
日期:2019.5.27
Abstract The aim of the presented research was to check whether 2-hydroxy-2-(ethoxyphenylphosphinyl)acetic acid is a versatile chiral phosphonic auxiliary (readily seen in 31P NMR). The preliminary studies indicate that this compound may be used as chiral derivatizing agents for amines and alcohols, since the separation of selected examples of diastereomeric alcohols and amines in 31P NMR spectra was