Dynamic Kinetic Asymmetric Ring-Opening/Reductive Amination Sequence of Racemic Nitroepoxides with Chiral Amines: Enantioselective Synthesis of Chiral Vicinal Diamines
作者:Juan Agut、Andreu Vidal、Santiago Rodríguez、Florenci V. González
DOI:10.1021/jo400501k
日期:2013.6.7
We report a highly diastereoselective synthesis of vicinal diamines by the treatment of nitroepoxides with primary amines and then a reducing agent. When using a chiral primary amine, racemic nitroepoxides are transformed into chiral diamines as a single enantiomers (>95:5 er) through a dynamic kinetic asymmetric transformation (DYKAT). The overall process is a one-pot procedure combining the exposure
我们报道了通过用伯胺然后还原剂对硝基环氧化物进行处理,对邻二胺进行高度非对映选择性的合成。当使用手性伯胺时,外消旋硝基环氧化物通过动态动力学不对称转化(DYKAT)转变为手性二胺,成为单一对映异构体(> 95:5 er)。整个过程是一锅法,将硝基环氧化物暴露于手性胺,得到氨基亚胺的非对映异构体混合物,然后进行立体选择性亚胺还原。