A Straightforward and Efficiently Scaleable Synthesis of Novel Racemic 4-Substituted-2,8-diazaspiro[4.5]decan-1-one Derivatives
作者:Andrew W. Thomas、Eva A. Krafft、Anke Kurt、Axel Maier、Daniel Zimmerli
DOI:10.1055/s-2005-918454
日期:——
Novel and straightforward syntheses (3-5 steps, high yields) of racemic diazaspiropiperidine derivatives based on the Michael addition of pipecolate-derived enolates to a range of nitroalkenes have been developed. The reaction has been shown to have a general scope and can be conducted on a preparatively useful scale. Isolation and identification of diazaspiropiperidine enantiomers was efficiently achieved using normal phase chiral HPLC.
基于米氏加成反应,开发了新颖且直接的合成方法(3-5步,高产率),用于制备外消旋二氮杂螺环員啶衍生物,该方法涉及由哌可酸盐衍生的烯醇盐与一系列硝基烯烃的反应。实验证明该反应具有广泛的适用性,并可在有实际应用规模的条件下进行。通过常相手性高效液相色谱法,高效地分离和鉴定了二氮杂螺环哌啶的旋光异构体。