Nickel-Catalyzed Cross-Coupling of Ammonia or Primary Alkylamines with (Hetero)aryl Sulfamates, Carbamates, or Pivalates
作者:Mark Stradiotto、Preston MacQueen
DOI:10.1055/s-0036-1590819
日期:2017.8
A catalyst system capable of effecting the cross-coupling of ammonia or primary alkylamines with (hetero)arylsulfamates, carbamates, or pivalates is reported for the first time. The air-stable nickel(II) pre-catalyst C1 tolerates a broad spectrum of heterocyclic functionality within both reaction partners, as well as ether, nitrile, pyrrole, trifluoromethyl, and boronate ester substituents. In the
首次报道了能够实现氨或伯烷基胺与(杂)芳基氨基磺酸酯、氨基甲酸酯或新戊酸酯交叉偶联的催化剂体系。空气稳定的镍 (II) 预催化剂 C1 可耐受两种反应伙伴以及醚、腈、吡咯、三氟甲基和硼酸酯取代基中的广谱杂环官能团。在涉及伯烷基胺和(杂)芳基氨基磺酸酯和氨基甲酸酯的反应的情况下,实现了室温交叉偶联。
Iron-Catalyzed Oxidative Amination of Benzylic C(sp<sup>3</sup>)–H Bonds with Anilines
作者:Yan-Ling Song、Bei Li、Zhen-Biao Xie、Dan Wang、Hong-Mei Sun
DOI:10.1021/acs.joc.1c02311
日期:2021.12.17
Iron-catalyzed oxidative amination of benzylic C(sp3)–H bonds with anilines bearing electron-withdrawing groups (EWGs) or electron-donating groups (EDGs) is realized based on simple variations of N-substituents on imidazolium cations in novel ionic Fe(III) complexes. The structural modification of the imidazolium cation resulted in regulation of the redox potential and the catalytic performance of
基于新型离子 Fe 中咪唑鎓阳离子上 N 取代基的简单变化,实现了苄基 C(sp 3 )-H 键与带有吸电子基团 (EWG) 或供电子基团 (EDG) 的苯胺的铁催化氧化胺化(三)配合物。咪唑鎓阳离子的结构改性导致氧化还原电位和铁金属中心催化性能的调节。使用DTBP作为氧化剂,[HI t Bu][FeBr 4 ]对带有EWG的苯胺表现出最高的催化活性,而[HIPym][FeBr 4 ]对EDG取代的苯胺更有效。这项工作为苄胺提供了替代途径,同时具有广泛的底物范围和铁催化的优点。
Disclosed is a method for preparing a benzyl amine compound, i.e., synthesizing a benzyl amine compound by means of an oxidation reaction between a methylbenzene/ethylbenzene compound and arylamine by using an ionic iron (III) complex containing 1,3-di-tert-butylimidazolium cation and having a molecular formula of [(RNCHCHNR)CH][FeBr
4
] (R being tert-butyl) and di-t-butyl peroxide as an oxidant. The present invention is not only applicable to a methylbenzene compound containing a benzylic primary carbon-hydrogen bond but also applicable to an ethylbenzene compound containing a benzylic secondary carbon-hydrogen bond, and therefore is widely applicable. This is the first case where the preparation of a benzyl amine compound by means of an oxidation reaction between a methylbenzene/ethylbenzene compound and arylamine is implemented by an iron catalyst.