activity together with enantioselectivity towards a series of aromatic, heteroaromatic, alkyl and thioalkyl sulfoxides. Chiral sulfoxides in the S configuration were prepared in approximately 50% yield and 92–99% enantiomeric excess through kineticresolution at an initial substrate concentration of up to 90 mM (11.2 g L−1). This study presents an efficient route for the enzymatic preparation of (S)-sulfoxides
光学纯亚砜是值得注意的化合物,在各个工业领域都有广泛的应用。在这里,我们报告了一种甲硫氨酸亚砜还原酶 B (MsrB) 同系物,它在外消旋 ( rac ) 亚砜的动力学拆分中表现出高对映选择性和广泛的底物范围。这种 MsrB 同系物,命名为li MsrB,是从Limnohabitans sp. 中鉴定出来的。103DPR2 并显示出良好的活性以及对一系列芳族、杂芳族、烷基和硫代烷基亚砜的对映选择性。S构型的手性亚砜通过动力学拆分以高达 90 mM(11.2 g L -1). 本研究提出了一种通过动力学拆分酶促制备 ( S )-亚砜的有效途径。
Enantioselective preparation of alkyl alkylsulfanylmethyl sulfoxides and 4,5-dihydroisoxazoles from alkanesulfinates of 1,2 : 5,6-di-O-isopropylidene-<scp>D</scp>-glucose
作者:Yolanda Arroyo-Gómez、Juan A. López-Sastre、Justo F. Rodríguez-Amo、Mercedes Santos-García、María A. Sanz-Tejedor
DOI:10.1039/p19940002177
日期:——
Reaction of (R) and (S)-alkanesulfinates of 1,2:5,6-di-O-isopropylidene-D-glucose (DAG) with methylsulfanylmethyllithium produces their corresponding dithioacetal mono-S-oxides with enantiomeric excesses ranging from 95 to 100%. On the other hand, exo-metallation of 3-methyl-4,5-dihydroisoxazoles and their subsequent reaction with (R)- and (S)-alkanesulfinates of DAG produces optically active 3-ethylsulfinylmethyl-4,5-dihydroisoxazoles.
Peroxygenase‐Catalysed Sulfoxidations in Non‐Aqueous Media
Immobilised peroxygenase showed superb stability under neat reaction conditions, allowing the asymmetric sulfoxidation reaction in very high product titre with a decent E-factor.
固定化过氧酶在纯净反应条件下表现出极好的稳定性,允许不对称磺化反应以非常高的产物滴度和良好的 E 因子进行。