Ruthenium-catalyzed meta/ortho-selective C-H alkylation of azoarenes using alkyl bromides. 2017

Gang Li, and Xingxing Ma, and Chunqi Jia, and Qingqing Han, and Ya Wang, and Junjie Wang, and Liuyang Yu, and Suling Yang
College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455002, P. R. China. lgorgchem@126.com yang_suling@163.com and Henan Province Key Laboratory of New Optoelectronic Functional Materials, Anyang Normal University, Anyang 455002, P. R. China.

meta/ortho-Selective CAr-H (di)alkylation reactions of azoarenes have been achieved via [Ru(p-cymene)Cl2]2 catalyzed ortho-metalation using various types of alkyl bromides. Particularly, dual meta-alkylation of azoarene and reduction offer an attractive strategy for the synthesis of meta-alkylanilines, which are difficult to access via traditional aniline functionalization methods.

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