Chiral Brønsted acid catalyzed asymmetric oxidation of N‐acyl sulfenamide by H
<sub>2</sub>
O
<sub>2</sub>
: An efficient approach to obtaining chiral N‐acyl sulfinamide
作者:Longjun Ma、Lizhe Bai、Zixuan Yu、Qinxu Shen
DOI:10.1002/chir.23478
日期:2022.9
long been recognized, methods for their synthesis are still auxiliary-based approaches which possess the disadvantages of poor atom economy and limited substrate universality. Due to the weak nucleophilicity of amides, it is more difficult to prepare chiral N-acylsulfinamides by traditional methods. Herein, we describe an example of catalytic asymmetric synthesis of N-acyl sulfinamides. In this work,
尽管手性亚磺酰胺试剂在合成化学中的作用早已得到认可,但其合成方法仍以辅助方法为主,存在原子经济性差、底物通用性有限等缺点。由于酰胺的亲核性较弱,传统方法制备手性N-酰基亚磺酰胺的难度较大。在此,我们描述了一个催化不对称合成 N-酰基亚磺酰胺的例子。在这项工作中,N-酰基次磺酰胺作为有用的底物,因为不可或缺的 N-H 键可以与手性磷酸形成有效的氢键。H 2 O 2(35%) 被用作末端氧化剂,以高收率和对映选择性制备亚磺酰胺,它可以很容易地衍生为亚砜而不损失对映选择性。