作者:Masanori Shigeno、Akihisa Kajima、Eito Toyama、Toshinobu Korenaga、Hiroyuki Yamakoshi、Kanako Nozawa‐Kumada、Yoshinori Kondo
DOI:10.1002/chem.202203549
日期:2023.3.13
effective base for deprotonative coupling reactions of toluenes with ketones. Various functionalities are allowed on the toluenes. Notably, this system proved successful with low-reactive toluenes bearing a large pKa value compared to that of the conjugate acid of LiHMDS (hexamethyldisilazane, 25.8, THF), as demonstrated by 4-phenyltoluene (38.57, THF) and toluene itself (∼43, DMSO).
六甲基二硅基氨基锂 (LiHMDS) 可作为甲苯与酮的去质子偶联反应的有效碱。甲苯上允许有各种官能团。值得注意的是,与 LiHMDS 的共轭酸(六甲基二硅氮烷,25.8,THF)相比,该系统被证明具有较大 pKa 值的低反应性甲苯是成功的,如 4-苯基甲苯(38.57,THF)和甲苯本身(~43 , 二甲基亚砜)。