General Method for the Suzuki–Miyaura Cross-Coupling of Primary Amide-Derived Electrophiles Enabled by [Pd(NHC)(cin)Cl] at Room Temperature
作者:Peng Lei、Guangrong Meng、Yun Ling、Jie An、Steven P. Nolan、Michal Szostak
DOI:10.1021/acs.orglett.7b03191
日期:2017.12.15
temperature Suzuki–Miyauracross-coupling of commonly encountered primary benzamides is reported. A combination of site-selective N,N-di-Boc-activation (tert-butoxycarbonyl activation) of the amide nitrogen with practical air- and moisture-stable, well-defined, and highly reactive [Pd(NHC)(cin)Cl] (NHC = N-heterocyclic carbene; cin = cinnamyl) provides a highly effective route to biarylketones from primary
Highly Selective and Divergent Acyl and Aryl Cross-Couplings of Amides via Ir-Catalyzed C–H Borylation/N–C(O) Activation
作者:Pengcheng Gao、Michal Szostak
DOI:10.1021/acs.orglett.0c02105
日期:2020.8.7
Herein, we demonstrate that amides can be readily coupled with nonactivated arenes via sequential Ir-catalyzed C–H borylation/N–C(O) activation. This methodology provides facile access to biaryl ketones and biaryls by the sterically controlled Ir-catalyzed C–H borylation and divergent acyl and decarbonylative amide N–C(O) and C–C activation. The methodology diverts the traditional acylation and arylation
Nickel-Catalyzed Esterification of Amides Under Mild Conditions
作者:Jun-Fei Li、Yao-Fang Wang、Yuan-Yuan Wu、Wen-Jing Liu、Jun-Wen Wang
DOI:10.1007/s10562-019-02966-6
日期:2020.3
Abstract The use of ligands to adjust the catalytic activity of the catalyst for esterification of amides is challenge in organic chemistry. In this paper, Nickel(II)-NHC-catalyzed the esterification reaction between N,N-di-Boc amide and alcohols at room temperature have been demonstrated. The imidazolium salt bearing a hydroxyl functionalized side arm showed high effective catalytic activity in the
Kinetically Controlled, Highly Chemoselective Acylation of Functionalized Grignard Reagents with Amides by N−C Cleavage
作者:Guangchen Li、Michal Szostak
DOI:10.1002/chem.201904678
日期:2020.1.13
(iPrMgCl⋅LiCl) permits excellent substrate scope with respect to both the amide and Grignard coupling partners. These reactions enable facile, operationally simple and chemoselective access to tetrahedral intermediates from amides under significantly milderconditions than chelation-controlled intermediates. This novel direct two-component coupling sets the stage for using amides as acylating reagents
Palladium-Catalyzed Suzuki–Miyaura Cross-Coupling of Amides via Site-Selective N–C Bond Cleavage by Cooperative Catalysis
作者:Guangrong Meng、Shicheng Shi、Michal Szostak
DOI:10.1021/acscatal.6b02323
日期:2016.11.4
Suzuki–Miyaura cross-coupling of primary benzamides enabled by a merger of site-selective N,N-di-Boc-activation and cooperative catalysis via N–C bond cleavage for the synthesis of biaryl ketones is reported. We present the synergistic combination of Lewis base and palladiumcatalysis as a concept to activate inert amide N–C bonds. The mild reaction conditions provide a direct route to structurally diverse