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
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%。
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).