Asymmetric Stepwise Reductive Amination of Sulfonamides, Sulfamates, and a Phosphinamide by Nickel Catalysis
作者:Xiaohu Zhao、Haiyan Xu、Xiaolei Huang、Jianrong Steve Zhou
DOI:10.1002/anie.201809930
日期:2019.1.2
Asymmetric reductive amination of poorly nucleophilic sulfonamides was realized in the presence of nickel catalysts and titanium alkoxide. A wide range of ketones, including enolizable ketones and some biaryl ones, were converted into sulfonamides in excellent enantiomeric excess. The cyclization of sulfamates and intermolecular reductive amination of a diarylphosphinamide were also successful. Formic
在镍催化剂和烷氧基钛存在下,实现了亲核性磺酰胺不良的不对称还原胺化反应。大量的酮,包括可烯醇化的酮和一些联芳基的酮,都以极好的对映体过量转化为磺酰胺。氨基磺酸盐的环化和二芳基次膦酰胺的分子间还原胺化也成功。甲酸被用作安全,经济的高压氢气替代品。