Inverting the Regioselectivity of the Berberine Bridge Enzyme by Employing Customized Fluorine-Containing Substrates
作者:Verena Resch、Horst Lechner、Joerg H. Schrittwieser、Silvia Wallner、Karl Gruber、Peter Macheroux、Wolfgang Kroutil
DOI:10.1002/chem.201201895
日期:2012.10.8
pharmaceuticals to block the degradation of bioactive compounds at a specific site of the molecule. Blocking of the reaction center of the enzyme‐catalyzed ring closure of 1,2,3,4‐tetrahydrobenzylisoquinolines by a fluoro moiety allowed redirecting the berberinebridgeenzyme (BBE)‐catalyzed transformation of these compounds to give the formation of an alternative regioisomeric product namely 11‐hydroxy‐functionalized
Deracemization By Simultaneous Bio-oxidative Kinetic Resolution and Stereoinversion
作者:Joerg H. Schrittwieser、Bas Groenendaal、Verena Resch、Diego Ghislieri、Silvia Wallner、Eva-Maria Fischereder、Elisabeth Fuchs、Barbara Grischek、Johann H. Sattler、Peter Macheroux、Nicholas J. Turner、Wolfgang Kroutil
DOI:10.1002/anie.201400027
日期:2014.4.1
chemo‐enzymatic deracemization concept by a cascade is described: the pathway involves two enantioselective oxidation steps and one non‐stereoselective reduction step, enabling stereoinversion and a simultaneous kinetic resolution. The concept was exemplified for the transformation of rac‐benzylisoquinolines to opticallypure (S)‐berbines. The racemic substrates were transformed to opticallypure products
Deracemisation of benzylisoquinoline alkaloids employing monoamine oxidase variants
作者:Joerg H. Schrittwieser、Bas Groenendaal、Simon C. Willies、Diego Ghislieri、Ian Rowles、Verena Resch、Johann H. Sattler、Eva-Maria Fischereder、Barbara Grischek、Wolf-Dieter Lienhart、Nicholas J. Turner、Wolfgang Kroutil
DOI:10.1039/c4cy00642a
日期:——
Deracemisation of benzylisoquinoline alkaloids was performed employing a recently developed variant of monoamine oxidase from Aspergillus niger (MAO-N variant D11).
Biocatalytic Organic Synthesis of Optically Pure (<i>S</i>)-Scoulerine and Berbine and Benzylisoquinoline Alkaloids
作者:Joerg H. Schrittwieser、Verena Resch、Silvia Wallner、Wolf-Dieter Lienhart、Johann H. Sattler、Jasmin Resch、Peter Macheroux、Wolfgang Kroutil
DOI:10.1021/jo201056f
日期:2011.8.19
title compounds is described that employs an enantioselective oxidative C–C bond formation catalyzed by berberinebridgeenzyme (BBE) in the asymmetric key step. This unique reaction yielded enantiomerically pure (R)-benzylisoquinoline derivatives and (S)-berbines such as the natural product (S)-scoulerine, a sedative and muscle relaxing agent. The racemic substrates rac-1 required for the biotransformation
描述了一种用于标题化合物不对称全合成的化学酶促方法,该方法在不对称关键步骤中采用由小檗碱桥酶 (BBE) 催化的对映选择性氧化 C-C 键形成。这种独特的反应产生了对映体纯的 ( R )-苄基异喹啉衍生物和 ( S )-小檗碱,例如天然产物 ( S )-scoulerine,一种镇静和肌肉松弛剂。外消旋底物rac - 1使用 Bischler-Napieralski 环化或 C1-Cα 烷基化方法在 4-8 个线性步骤中制备生物转化所需的化合物。化学酶法合成用于制备 14 种对映异构纯生物碱,包括天然产物 ( S )-scoulerine 和 ( R ) -reticuline,在 5-9 个线性步骤中总产率高达 20%。