Copper(ii)-catalyzed C–H (sp3) oxidation and C–N cleavage: synthesis of methylene-bridged compounds using TMEDA as a carbon source in water
作者:Dan Zhao、Yue Wang、Min-Xue Zhu、Qi Shen、Lei Zhang、Yun Du、Jian-Xin Li
DOI:10.1039/c3ra40695d
日期:——
A green, simple, and efficient protocol for the selective methylenation via CuCl2/oxygen-mediated CâH (sp3) oxidation and CâN cleavage using tetramethylethylenediamine (TMEDA) as a carbon source has been developed. The reactions were achieved in green solvent water under atmospheric conditions. The protocol exhibited a broad substrate scope including indoles, anilines, pyrroles and 1,3-dicarbonyls. Furthermore, two key intermediates of the reaction were successfully identified and the mechanism was explored.
以四甲基乙二胺(TMEDA)为碳源,通过 CuCl2/氧气介导的 CâH (sp3) 氧化和 CâN 裂解进行选择性亚甲基化的绿色、简单而高效的方案已经开发出来。反应在大气条件下的绿色溶剂水中进行。该方案的底物范围很广,包括吲哚、苯胺、吡咯和 1,3-二羰基。此外,还成功鉴定了反应的两个关键中间体,并探索了反应机理。