Nonheme Iron-Mediated Amination of C(sp<sup>3</sup>)–H Bonds. Quinquepyridine-Supported Iron-Imide/Nitrene Intermediates by Experimental Studies and DFT Calculations
作者:Yungen Liu、Xiangguo Guan、Ella Lai-Ming Wong、Peng Liu、Jie-Sheng Huang、Chi-Ming Che
DOI:10.1021/ja3122526
日期:2013.5.15
(1, qpy = 2,2':6',2″:6″,2''':6''',2''''-quinquepyridine) is a highly active nonheme iron catalyst for intra- and intermolecular amination of C(sp(3))-H bonds. This complex effectively catalyzes the amination of limiting amounts of not only benzylic and allylic C(sp(3))-H bonds of hydrocarbons but also the C(sp(3))-H bonds of cyclic alkanes and cycloalkane/linear alkane moieties in sulfamate esters,
7配位络合物[Fe(qpy)(MeCN)2](ClO4)2 (1, qpy = 2,2':6',2″:6″,2''':6''',2' '''-quinquepyridine) 是一种高活性的非血红素铁催化剂,用于 C(sp(3))-H 键的分子内和分子间胺化。该复合物不仅有效地催化有限量的烃的苄基和烯丙基 C(sp(3))-H 键的胺化,而且还催化环烷烃和环烷烃/线性烷烃部分的 C(sp(3))-H 键的胺化。氨基磺酸酯,例如衍生自薄荷烷和甾体胆烷和雄甾烷的那些,使用PhI=NR或“PhI(OAc)2+H2NR”[R=Ts(对甲苯磺酰基),Ns(对硝基苯磺酰基)]作为氮源,胺化产物的分离率高达 93%。亚铁酰亚胺/氮烯中间体 [Fe(qpy)(NR)(X)](n+) (CX, X = NR, 溶剂, 或阴离子)在实验研究的基础上提出,包括 ESI-MS 分析、交叉实验、哈米特图以及与 CH