Asymmetric synthesis of diverse α,α-diarylmethylamines via aryl Grignard additions to chiral N-2,4,6-triisopropylbenzenesulfinylimines
作者:Zhengxu Han、Robert Busch、Keith R. Fandrick、Angelica Meyer、Yibo Xu、Dhileep K. Krishnamurthy、Chris H. Senanayake
DOI:10.1016/j.tet.2011.07.019
日期:2011.9
A mild method has been developed for the asymmetric synthesis of a variety of chiral diarylmethylamines via the addition of aryl Grignard reagents to chiral N-2,4,6-triisopropylbenzenesulfinylimines in high yields and high diastereoselectivities. Higher stereoselectivity was obtained for most of the examples studied when the reactions are performed at ambient temperature as compared to cryogenic conditions
已经开发了一种温和的方法,用于以高收率和高非对映选择性将芳基格氏试剂添加到手性N -2,4,6-三异丙基苯亚磺酰亚胺中,从而不对称合成多种手性二芳基甲胺。与低温条件相比,当反应在环境温度下进行时,对于大多数研究的实施例而言,获得了更高的立体选择性。N -2,4,6-三异丙基苯亚磺酰胺被证明是最佳的手性助剂,因为与更常用的叔丁烷亚磺酰胺或p相比,它提供了更高的非对映选择性。-甲苯亚磺酰胺在二芳基甲胺合成子的合成中。提出了从三异丙基苄基助剂得到的改进的选择性的基本原理。