(<i>S</i>
)-Selectivity in Phenylacetyl Carbinol Synthesis Using the Wild-Type Enzyme Acetoin:Dichlorophenolindophenol Oxidoreductase from <i>Bacillus licheniformis</i>
作者:Pier Paolo Giovannini、Lindomar Alberto Lerin、Michael Müller、Giovanni Bernacchia、Morena De Bastiani、Martina Catani、Graziano Di Carmine、Alessandro Massi
DOI:10.1002/adsc.201600359
日期:2016.9.1
well known biocatalysts for the asymmetric synthesis of α‐hydroxy ketones with preferential (R)‐selectivity. Pharmaceutically relevant phenylacetyl carbinol (PAC) has been prepared with absolute (S)‐configuration only on a few occasions using enzyme variants suitably designed through rational site‐directed mutagenesis approaches. Herein, we describe the synthesis of (S)‐phenylacetyl carbinol products with
tert alert! A thiamine diphosphate (ThDP)‐dependent enzyme catalyzing the cross‐condensation of a keto acid with several activated and nonactivated ketones gives chiral tertiary alcohols, products that are otherwise difficult to obtain in an enantioenriched form. To enable comparison of aldehyde‐/ketone‐accepting enzymes and to guide site‐directed mutagenesis studies, we solved the crystal structure
(S)-Phenylacetylcarbinol [(S)-PAC] and its derivatives are valuable intermediates for the synthesis of various APIs (active pharmaceutical ingredients), however their selective synthesis is challenging. As no highly selective enzymes or chemical...
(S)-苯基乙酰基甲醇[[ S ] -PAC ]及其衍生物是合成各种API(活性药物成分)的有价值的中间体,但是它们的选择性合成具有挑战性。由于没有高度选择性的酶或化学物质...
Benchtop NMR for Online Reaction Monitoring of the Biocatalytic Synthesis of Aromatic Amino Alcohols
作者:C. Claaßen、K. Mack、D. Rother
DOI:10.1002/cctc.201901910
日期:2020.2.20
Online analytics provides insights into the progress of an ongoing reaction without the need for extensive sampling and offline analysis. In this study, we investigated benchtop NMR as an onlinereactionmonitoring tool for complex enzyme cascade reactions. OnlineNMR was used to monitor a two‐step cascade beginning with an aromatic aldehyde and leading to an aromatic amino alcohol as the final product
在线分析可以深入了解正在进行的反应的进展情况,而无需进行大量采样和离线分析。在这项研究中,我们研究了台式核磁共振作为复杂酶级联反应的在线反应监测工具。在线核磁共振用于监测从芳香醛开始直至最终产物芳香氨基醇的两步级联,应用两种不同的酶和各种共底物和中间体。台式 NMR 能够在缓冲系统中检测单位数 mM 范围内的反应组分浓度,而无需使用氘代溶剂。通过 NMR 测定的浓度与通过 uHPLC 分析的离线样品相关,并显示两种方法之间具有良好的相关性。总之,台式核磁共振被证明是一种灵敏、选择性和可靠的在线反应监测(多步)生物合成方法。未来,在线分析系统(例如所描述的台式核磁共振设备)不仅可以直接监测反应,还可以形成生物催化反应自我调节的基础。