Chiral silicon groups as auxiliaries for enantioselective synthesis: access to optically active silanes by biotransformation and the enantiospecific preparation of (R)-(+)-1-phenylethanol
作者:Priska Huber、Svetoslav Bratovanov、Stefan Bienz、Christoph Syldatk、Markus Pietzsch
DOI:10.1016/0957-4166(95)00422-x
日期:1996.1
The synthesis of the optically active alkoxymethyl-substituted acetylsilanes (+)-3 and (−)-b was achieved by the bioreduction of (±)-3 with resting cells of Trigonopsis variabilis to the diastereoisomeric alcohols (+)-4 and (+)-5. These two compounds were separated by chromatography and separately reoxidized to the desired optically active silyl ketones. As a simple example of the use of chiral al
-光学活性烷氧基甲基取代的acetylsilanes的合成(+)3和( - ) - b用的(±)生物还原实现- 3与静息的细胞变异三角酵母的非对映异构的醇(+) - 4和(+ )-5。通过色谱法分离这两种化合物,并分别再氧化为所需的旋光性甲硅烷基酮。作为使用手性烷氧基甲基取代的甲硅烷基作为合成对映异构体富集的无硅化合物的助剂的简单例子,螯合物控制了苯基锂向(-)- 3的1,2-加成反应并给出了相应的主要加成产物向(R)-(+)-1-苯基乙醇(+)- 10的立体定向转化。