作者:Vojtěch Dočekal、Simona Petrželová、Ivana Císařová、Jan Veselý
DOI:10.1002/adsc.202000231
日期:2020.7.16
The present study reports an asymmetric organocatalytic cascade reaction of 4‐nitroisoxazole derivative with α ,β‐unsaturated aldehydes catalysed by chiral secondary amine. Using this approach, 1,2,3‐trisubstituted cyclopropane products were obtained in isolated yields up to 98% with moderate diastereoselectivities, and enantiopurity up to 99% ee . Moreover, this synthetic protocol can be used for
本研究报道了4-硝基异恶唑衍生物与手性仲胺催化的α,β-不饱和醛类的不对称有机催化级联反应。使用这种方法,可以得到1,2,3-三取代的环丙烷产物,分离产率高达98%,具有中等非对映选择性,对映体纯度高达99%ee。此外,该合成方案可用于进一步的应用,如相应环丙烷的一组额外转化以及GABA配体的正式合成所示。