De Novo Synthesis of Troc-Protected Amines: Intermolecular Rhodium-Catalyzed C−H Amination with <i>N</i>-Tosyloxycarbamates
作者:Hélène Lebel、Kim Huard
DOI:10.1021/ol062953t
日期:2007.2.1
intermolecular C-H insertion of the nitrene derived from 2,2,2-trichloroethyl-N-tosyloxycarbamate proceeded in good to excellent yields to produce a variety of Troc-protected amines. With cyclic aliphatic alkanes, it is possible to use only 2 equiv of substrate, whereas the reaction with aromatic alkanes is run neat. Not only does the nitrene insertion proceed in benzylic, secondary, and tertiary C-H bonds
由2,2,2-三氯乙基-N-甲苯磺酰氧基氨基甲酸酯衍生的铑的铑催化的分子间CH插入反应良好,收率很高,可制得各种Troc保护的胺。对于环状脂肪族烷烃,仅使用2当量的底物是可能的,而与芳香族烷烃的反应则是纯净的。不仅氮烯以苄基,仲和叔CH键进行插入,而且以高收率获得伯CH插入产物。最后,讨论了使用手性铑催化剂来提供该方法的对映选择性形式。[反应:请参见文字]。