Rhodium(I)-Catalyzed Aryl C–H Carboxylation of 2-Arylanilines with CO<sub>2</sub>
作者:Yuzhen Gao、Zhihua Cai、Shangda Li、Gang Li
DOI:10.1021/acs.orglett.9b01105
日期:2019.5.17
An unprecedented Rh(I)-catalyzed, amino-group-assisted C–H carboxylation of 2-arylanilines with CO2 under redox-neutral conditions has been developed. This reaction was promoted by a phosphine ligand with t-BuOK as the base and did not require the use of additional strong organometallic reagent. It enabled an efficient direct conversion of a broad range of 2-(hetero)arylanilines including electron-deficient
An efficient synthesis of free (NH)-phenanthridinones through Pd-catalyzed C(sp(2))-H aminocarbonylation of unprotected o-arylanilines under an atmospheric pressure of CO has been developed. Some ortho heteroarene substituted anilines as well as N-alkyl protected o-arylanilines are also suitable substrates for this C-H aminocarbonylation reaction.
Nickel-Catalyzed Lactamization Reaction of 2-Arylanilines with CO2
作者:Lu Wang、Hanxuan Wu、Yucheng Zhao、Bin Li、Baiquan Wang
DOI:10.1021/acs.orglett.4c01156
日期:2024.5.10
Transition-metal-catalyzed lactamization and lactonization of C–H bonds with CO2 assisted by the chelation of amino or hydroxyl groups have been developed but limited to the use of precious metal catalysts such as palladium and rhodium. In this work, we report the nonprecious metal nickel-catalyzed lactamization reaction of 2-arylanilines with CO2 under redox-neutral conditions via C–H bond activation
A convenient one-step access to biologically important phenanthridinones 1 has been realized based upon Suzuki-Miyaura cross-coupling reaction. Reactions of 2-aminophenylboronic acid 2 with 2-halobenzoate 3 took place smoothly to afford substituted phenanthridinones 1 in excellent yields in the presence of palladium(II) acetate and 2-dicyclohexylphosphino-2',6'-dimethoxybiphenyl (SPhos) as precatalysts. A natural product phenaglydon lb was synthesized in one-pot manner from readily available starting materials in 95% yield. (C) 2013 Elsevier Ltd. All rights reserved.