Chloroperoxidase-catalyzed asymmetric synthesis of series of aromatic cyclic sulfoxides
作者:Stig G Allenmark、Malin A Andersson
DOI:10.1016/0957-4166(96)00113-9
日期:1996.4
sulfoxidation. Enantioselectivity was lost for the symmetric disulfide, 1,3-benzodithiol, indicating an equal accessibility of the FeO complex towards both sulfur atoms and an active site centred above the heme-iron atom. In all cases with pronounced enantioselectivity the reaction gave the (R)-sulfoxide as observed previously with alkyl aryl sulfides. A change of oxygen source from hydrogen peroxide to t-butyl
Chemo- and Stereoselective Cytochrome P450-BM3-Catalyzed Sulfoxidation of 1-Thiochroman-4-ones Enabled by Directed Evolution
作者:Jian-bo Wang、Adriana Ilie、Manfred T. Reetz
DOI:10.1002/adsc.201700414
日期:2017.6.19
evolution utilizing an unconventional approach to saturation mutagenesis has been applied to cytochromeP450‐BM3 as a catalyst in the asymmetricsulfoxidation of 1‐thiochroman‐4‐one and two derivatives thereof with complete chemoselectivity as well as (S)‐ and (R)‐selectivity on an optional basis. Whereas wild‐type P450‐BM3 shows in the case of the parent compound poor enantioselectivity in slight favor of
P450-BM3-Catalyzed Sulfoxidation versus Hydroxylation: A Common or Two Different Catalytically Active Species?
作者:Jian-bo Wang、Qun Huang、Wei Peng、Peng Wu、Da Yu、Bo Chen、Binju Wang、Manfred T. Reetz
DOI:10.1021/jacs.9b13061
日期:2020.1.29
via sulfoxidation and oxidative hydroxylation, respectively, catalyzed by regio- and enantioselective mutants of P450-BM3 which were constructed by directed evolution. 1-Thiochromanone and 1-tetralone were used as the isosteric substrates because, unlike previous studies involving fully flexible compounds such as thia-fatty acids and fatty acids, respectively, these compounds are rigid and cannot occur
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。
Asymmetric Oxidation of Cyclic Sulfides Catalyzed by an Aluminum(salalen) Complex as the Catalyst