[Rh<sup>III</sup>(Cp*)]-Catalyzed<i>ortho</i>-Selective Direct C(sp<sup>2</sup>)H Bond Amidation/Amination of Benzoic Acids by<i>N</i>-Chlorocarbamates and<i>N</i>-Chloromorpholines. A Versatile Synthesis of Functionalized Anthranilic Acids
作者:Fo-Ning Ng、Zhongyuan Zhou、Wing-Yiu Yu
DOI:10.1002/chem.201304855
日期:2014.4.7
furnishing highly functionalized anthranilic acids. A stoichiometric reaction of a cyclometallated rhodium(III) complex of benzo[h]quinoline with a silver salt of N‐chlorocarbamate afforded an amido–rhodium(III) complex, which was isolated and structurally characterized by X‐ray crystallography. This finding confirmed that the CNbond formation results from the cross‐coupling of N‐chlorocarbamate with
ionic aziridination is a very convenient and risk-free procedure compared with the conventional method with azides as nitrogen sources, and gives aziridinofullerenes from various readily available amides (carbamates, ureas, carboxamides, and phosphamides). For example, benzyl carbamate was chlorinated by tert-butyl hypochlorite (tert-BuOCl) and then reacted with C60 in the presence of base to give
(NHC)Cu-Catalyzed Mild C–H Amidation of (Hetero)arenes with Deprotectable Carbamates: Scope and Mechanistic Studies
作者:Weilong Xie、Jung Hee Yoon、Sukbok Chang
DOI:10.1021/jacs.6b07486
日期:2016.9.28
mediates a direct C-H amidation of (hetero)arenes by using N-chlorocarbamates or their sodio derivatives as the practical amino sources. A facile stoichiometric reaction of reactive copper-aryl intermediates with the amidating reagent led us to isolate key copper arylcarbamate species with the formation of a C-N bond. The use of (t)BuONa base made this transformation catalytic under mild conditions. The
Synthesis of 8-Aminoquinolines by Using Carbamate Reagents: Facile Installation and Deprotection of Practical Amidating Groups
作者:Donghyeon Gwon、Heejun Hwang、Hye Kyung Kim、Seth R. Marder、Sukbok Chang
DOI:10.1002/chem.201503511
日期:2015.11.23
the development of practical routes to 8‐aminoquinolines by using readily installable and easily deprotectable amidatingreagents. Two scalable procedures were optimized under RhIII‐catalyzed conditions: i) the use of pre‐generated chlorocarbamates and ii) a two‐step one‐pot process that directly employs carbamates. Both approaches are highly convenient for the gram‐scale synthesis of 8‐aminoquinolines