Resolution of Racemic 2-Aminocyclohexanol Derivatives and Their Application as Ligands in Asymmetric Catalysis
作者:Ingo Schiffers、Toni Rantanen、Frank Schmidt、Werner Bergmans、Lorenzo Zani、Carsten Bolm
DOI:10.1021/jo052433w
日期:2006.3.1
trans-2-(N-benzyl)amino-1-cyclohexanol by hydrogenation and subsequent derivatization give access to a broad variety of diversely substituted derivatives. Furthermore, the corresponding cis isomers are readily available. Applications of these optically active aminocyclohexanols in catalyzed asymmetric phenyl transfer reactions to benzaldehydes and transfer hydrogenations of aryl ketones lead to products with
描述了用于拆分外消旋2-氨基环己醇衍生物的制备上容易且有效的方案,通过顺序使用(R)-和(S)-扁桃酸递送两种对映体,其对映体过量(ee)均大于99%。简单的水后处理程序可分离出分析纯形式的氨基醇,并几乎定量回收扁桃酸。对映体反式-2-(N的脱苄基作用-苄基)氨基-1-环己醇通过氢化和随后的衍生作用获得了各种各样的不同取代的衍生物。此外,相应的顺式异构体是容易获得的。这些光学活性氨基环己醇在催化的不对称苯基转移反应中转化为苯甲醛和转移芳基酮的氢化反应,可产生ee高达96%的产物。