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(TME
DA)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。