Stereoselective Radical Amination of Electron-Deficient C(sp<sup>3</sup>)–H Bonds by Co(II)-Based Metalloradical Catalysis: Direct Synthesis of α-Amino Acid Derivatives via α-C–H Amination
作者:Hongjian Lu、Yang Hu、Huiling Jiang、Lukasz Wojtas、X. Peter Zhang
DOI:10.1021/ol302511f
日期:2012.10.5
The cobalt(II) complex of 3,5-DitBu-IbuPhyrin, [Co(P1)], is an effective catalyst for intramolecular amination of electron-deficient C–H bonds, including those adjacent to electron-withdrawing CO2R, C(O)NR2, C(O)R, and CN groups, in excellent yields with high regio- and stereoselectivity. The [Co(P1)]-catalyzed amination system provides a direct method for the synthesis of α-amino acid derivatives
3,5-Di t Bu-IbuPhyrin的钴 (II) 配合物[Co( P1 )] 是缺电子 C-H 键的分子内胺化的有效催化剂,包括与吸电子 CO 2 R相邻的那些、C(O)NR 2、C(O)R 和 CN 基团,产率高,区域选择性和立体选择性高。[Co( P1 )]-催化的胺化系统为从相应的羧酸盐前体合成α-氨基酸衍生物提供了一种直接方法。