Dipeptide-Based Chiral Tertiary Amine-Catalyzed Asymmetric Conjugate Addition Reactions of 5<i>H</i>-Thiazol/Oxazol-4-Ones
作者:Jiangtao Li、Shuai Qiu、Xinyi Ye、Bo Zhu、Hongjun Liu、Zhiyong Jiang
DOI:10.1021/acs.joc.6b02384
日期:2016.12.2
Highly enantio- and chemo-selective 1,4-conjugate addition process of 5H-thiazol-4-ones with maleimides or 1,4-naphthoquinones, and 5H-oxazol-4-ones with maleimides were performed under a dipeptide-based tertiary amine (DP-UAA) catalyst. A series of valuable N,S- and N,O-containing heterocyclic compounds with excellent enantio- and disastereo-selectivities (up to >99% ee, > 20:1 dr) were attained.
在基于二肽的基础上,对5 H-噻唑-4-酮与马来酰亚胺或1,4-萘醌和5 H-恶唑-4-酮与马来酰亚胺进行高度对映和化学选择性的1,4-共轭加成过程叔胺(DP-UAA)催化剂。获得了一系列有价值的含N,S和N,O的杂环化合物,它们具有出色的对映选择性和灾难选择性(高达> 99%ee,> 20:1 dr)。