MgCl 2 -catalyzed trifluoromethylation of carbonyl compounds using (trifluoromethyl)trimethylsilane as the trifluoromethylating agent
作者:Bin Cui、Hui Sun、Yibo Xu、Lili Duan、Yue-Ming Li
DOI:10.1016/j.tet.2017.10.021
日期:2017.11
Using (trifluoromethyl)trimethylsilane (TMSCF3) as the trifluoromethylating agent, MgCl2-catalyzed trifluoromethylation of carbonyl compounds proceeded readily at room temperature. In the presence of 10 mol% of MgCl2, a variety of carbonyl substrates such as aliphatic/aromatic aldehydes, acyclic/cyclic ketones and esters could be trifluoromethylated in DMF, giving the corresponding trimethylsilyl ethers
使用(三氟甲基)三甲基硅烷(TMSCF 3)作为三氟甲基化剂,MgCl 2催化的羰基化合物的三氟甲基化在室温下容易进行。在10 mol%的MgCl 2存在下,可以将各种羰基底物(例如脂族/芳族醛,无环/环酮和酯)在DMF中进行三氟甲基化,从而以高达93%的分离产率得到相应的三甲基甲硅烷基醚(缩酮) 。在三甲基甲硅烷基缩酮水解后,很容易获得三氟甲基酮。反应可以耐受空气和湿气,因此不需要使用氧气和无湿气的条件。