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。
Synthesis of Chiral Sulfoxides by A Cyclic Oxidation‐Reduction Multi‐Enzymatic Cascade Biocatalysis
An unconventional biocatalytic oxidation-reduction cascade system with cofactor regeneration was established for the synthesis of enantiopure sulfoxides using prochiral sulfildes as substrates. Heteroaryl alkyl, aryl alkyl and dialkyl sulfoxides in R configuration were prepared in >90 % conversion with >90 % ee through the cascade catalysis of MsrA, Fus-SMO and three other auxiliary enzymes (Trx, Trx-R
建立了一种具有辅因子再生的非常规生物催化氧化还原级联系统,用于以前手性硫醚为底物合成对映体纯亚砜。通过 MsrA、Fus-SMO 和其他三种辅助酶(Trx、Trx-R 和 GDH)的级联催化,制备了R构型的杂芳基烷基、芳基烷基和二烷基亚砜,转化率 >90% , ee >90%。
New oxyfunctionalization capabilities for .omega.-hydroxylases. Asymmetric aliphatic sulfoxidation and branched ether demethylation
作者:Andreas G. Katopodis、Homer A. Smith、Sheldon W. May
DOI:10.1021/ja00211a033
日期:1988.2.3
Asymmetric synthesis of alkane- and arenesulfinates of diacetone-D-glucose (DAG): an improved and general route to both enantiomerically pure sulfoxides
作者:I. Fernandez、N. Khiar、J. M. Llera、F. Alcudia
DOI:10.1021/jo00051a022
日期:1992.12
Diacetone-D-glucose (DAG), a commercially available, sugar-derived secondary alcohol, was found to react with alkane- and arenesulfinyl chlorides in the presence of a tertiary amine in a very useful manner. When i-Pr2Net is used as the base, (-)-(S)-alkane- and arenesulfinates are obtained in 50-90% yield with 89-greater-than-or-equal-to 95% de. Simply changing the base from i-Pr2NEt to Py affords (+)-(R)-alkane- and arenesulfinates in 56-87% yield with 70-greater-than-or-equal-to 95% de. The de's were determined by H-1 NMR. Optically pure alkane- and arenesulfinates are obtained either by recrystallization or by column chromatography. These sulfinates were transformed into various enantiomerically pure sulfoxides (alkyl alkyl and alkyl aryl) by reaction with different Grignard reagents. This new methodology is cheap, quick, and very convenient when both enantiomers of a given sulfoxide are needed enantiomerically pure. The influence of the solvent, as well as the effect of other types of bases, on the stereochemical course of the reaction has been evaluated, and a possible origin of the diastereoselectivity is discussed. Other optically pure secondary alcohols are used m the same reaction, and the comparison of their behavior with that of DAG is also reported.
An efficient synthesis of both enantiomers of chiral non racemic methylsulfoxides from DAG
作者:José M. Llera、Inmaculada Fernández、Felipe Alcudia
DOI:10.1016/0040-4039(91)80503-x
日期:1991.12
Diacetone-D-Glucose is stereoselectively converted to its (S)- or (R)-methanesulfinates 1 and 2 in 90 and 87% yield by treatment with methylsulfinyl chloride in the presence of diisopropylethylamine or pyridine, respectively. After purification, sulfinates 1 and 2 were transformed into both epimers of enantiomerically pure methylsulfoxides by reaction with Grignard reagents.