Practical Singly and Doubly Electrophilic Aminating Agents: A New, More Sustainable Platform for Carbon–Nitrogen Bond Formation
作者:Padmanabha V. Kattamuri、Jun Yin、Surached Siriwongsup、Doo-Hyun Kwon、Daniel H. Ess、Qun Li、Guigen Li、Muhammed Yousufuddin、Paul F. Richardson、Scott C. Sutton、László Kürti
DOI:10.1021/jacs.7b05279
日期:2017.8.16
symmetrical and unsymmetrical diaryl-, arylalkyl-, and dialkylamines that relies on the facile single or double addition of readily available C-nucleophiles to the nitrogen atom of bench-stable electrophilic aminating agents. Practical single and double polarity reversal (i.e., umpolung) of the nitrogen atom is achieved using sterically and electronically tunable ketomalonate-derived imines and oximes.
Sulfonato-imino copper(<scp>ii</scp>) complexes: fast and general Chan–Evans–Lam coupling of amines and anilines
作者:V. Hardouin Duparc、F. Schaper
DOI:10.1039/c7dt02260c
日期:——
Sulfonato-imine coppercomplexes with either chloride or triflate counteranions were prepared in a one-step reaction followed by anion-exchange. They are highly active in Chan-Evans-Lam couplings under mild conditions with a variety of amines or anilines, in particular with sterically hindered substrates. No optimization of reaction conditions other than time and/or temperature is required.
Chan–Evans–Lam Couplings with Copper Iminoarylsulfonate Complexes: Scope and Mechanism
作者:Valérie Hardouin Duparc、Guillaume L. Bano、Frank Schaper
DOI:10.1021/acscatal.8b01881
日期:2018.8.3
Copper(II) pyridyliminoarylsulfonate complexes with chloride or triflate counteranions were employed in Chan–Evans–Lam (CEL) couplings of N-nucleophiles and arylboronic acids. The complexes avoided typical side reactions in CEL couplings, and an excess of boronic acid was not required. Water was tolerated, and addition of neither base nor other additives was necessary. Primary amines, acyclic and cyclic
Copper-catalyzed, ceric ammonium nitrate mediated <i>N</i>-arylation of amines
作者:Uma Maheshwar Gonela、Seth Y. Ablordeppey
DOI:10.1039/c8nj06145a
日期:——
reported. This 'Chan-Evans-Lam' reaction has revealed that at room temperature, catalytic copper(II) acetate and cericammoniumnitrate (CAN) as an oxidant, N-arylation can result in an effective C-N bond formation. This air stable, practical, robust protocol enables a variety of functional group tolerance on both boronic acid and amine partners.
Nickel Dual Photoredox Catalysis for the Synthesis of Aryl Amines
作者:Ryan J. Key、Aaron K. Vannucci
DOI:10.1021/acs.organomet.8b00121
日期:2018.5.14
of coupling amines with aryl halides in good to excellent yields. Furthermore, it was found that these reactions are functional under ambient conditions with catalyst loadings of 1 mol %. Spectroscopic studies provide support that this amination mechanism proceeds via a nitrogen-based radical intermediate. This N-radical mechanism offers direct synthetic access to di- and triaryl amines from nickel