Asymmetric β-Boration of α,β-Unsaturated <i>N</i>-Acyloxazolidinones by [2.2]Paracyclophane-Based Bifunctional Catalyst
作者:Lei Zhao、Yudao Ma、Wenzeng Duan、Fuyan He、Jianqiang Chen、Chun Song
DOI:10.1021/ol302839d
日期:2012.11.16
An efficient copper-catalyzed asymmetric conjugate boration has been achieved by exploiting a new planar and central chiral bicyclic triazolium ligand. This protocol was highly efficient and gave a variety of chiral secondary alkylboronates in 97-99% ee. A preliminary mechanistic study supports the bifunctional nature of the catalyst.