Iridium-catalyzed direct C–H amidation of anilines with sulfonyl azides: easy access to 1,2-diaminobenzenes
作者:Lianhui Wang、Zi Yang、Mengqi Yang、Rongyi Zhang、Changsheng Kuai、Xiuling Cui
DOI:10.1039/c7ob01899a
日期:——
An Ir(III)-catalyzed regioselective C–H amidation of anilines with sulfonyl azides is described. The developed protocol has good compatibility with diverse functional groups, efficiently providing the monoamidated products with good to excellent yields under mild reaction conditions. Furthermore, the 2-pyrimidyl and sulfonyl moieties in the amidated products can readily be removed, offering the synthetically
The Direct Rh(III)-Catalyzed C–H Amidation of Aniline Derivatives Using a Pyrimidine Directing Group: The Selective Solvent Controlled Synthesis of 1,2-Diaminobenzenes and Benzimidazoles
作者:Shrikant M. Khake、Naoto Chatani
DOI:10.1021/acs.orglett.0c01126
日期:2020.5.1
The regioselective Rh(III)-catalyzed C-Hamidation of aniline derivatives with dioxazolones as an amidating reagent with a pyrimidine as a directing group leading to the production of 1,2-diaminobenzene derivatives or benzimidazole derivatives is described. The product distribution is controlled by the nature of solvent used. The reaction provides a broad substrate scope for aniline derivatives with
C−H Cyanation of 6-Ring N-Containing Heteroaromatics
作者:Bryony L. Elbert、Alistair J. M. Farley、Timothy W. Gorman、Tarn C. Johnson、Christophe Genicot、Bénédicte Lallemand、Patrick Pasau、Jakub Flasz、José L. Castro、Malcolm MacCoss、Robert S. Paton、Christopher J. Schofield、Martin D. Smith、Michael C. Willis、Darren J. Dixon
DOI:10.1002/chem.201703931
日期:2017.10.20
them have the potential for far‐reaching impact across synthetic chemistry and the biomedical sciences. Herein, we report an approach to heteroaromatic C−H cyanation through triflic anhydrideactivation, nucleophilicaddition of cyanide, followed by elimination of trifluoromethanesulfinate to regenerate the cyanated heteroaromatic ring. This one‐pot protocol is simple to perform, is applicable to a broad
A copper-mediated multi-component reaction was developed through isocyanide insertion into N–H bonds of less active secondary arylamines. This approach leads to an efficient synthesis of unsymmetrical tetrasubstituted ureas in one pot.
Cp*Ir<sup>III</sup>
-Catalyzed [3+2] Annulations of <i>N</i>
-Aryl-2-aminopyrimidines with Sulfoxonium Ylides to Access 2-Alkyl Indoles Through C-H Bond Activation
A novel synthesis of 2‐alkyl indoles that uses N‐aryl‐2‐aminopyrimidines and sulfoxonium ylides was developed. It is an efficient and mild method for the synthesis of 2‐alkyl indoles. environmentally friendly solvents, efficient alternative carbenoid precursors, and novel catalyst system were used to complete this reaction. Many different directing groups can be used in this process, and the reaction