The Ruppert–Prakash reagent is the most powerful and well-documented reagent for trifluoromethylation. Despite its versatility, no general method exists for its use in a flow system. Here we report the first flow trifluoromethylation of carbonylcompounds and its utility for drug synthesis of efavirenz and HSD-016, including preliminary results of enantioselective variants.
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 carbonylcompounds 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
N-Heterocyclic Carbene Catalyzed Trifluoromethylation of Carbonyl Compounds
作者:Jinhua J. Song、Zhulin Tan、Jonathan T. Reeves、Fabrice Gallou、Nathan K. Yee、Chris H. Senanayake
DOI:10.1021/ol050568i
日期:2005.5.1
carbene (NHC) catalyzed trifluoromethylation reaction of carbonylcompounds was discovered. Both enolizable and nonenolizable aldehydes and alpha-keto esters undergo facile trifluoromethylation with TMSCF3 at room temperature in the presence of only 0.5-1 mol % of the commercially available NHC (1), providing CF3-substituted alcohols in good yields. Selective trifluoromethylation of aldehydes over ketones
Fe-Catalyzed Nucleophilic Activation of C–Si versus Allylic C–O Bonds: Catalytic Trifluoromethylation of Carbonyl Groups versus Tandem Trifluormethylation–Allylation of Olefins
作者:Johannes E. M. N. Klein、Susanne Rommel、Bernd Plietker
DOI:10.1021/om5005012
日期:2014.10.27
The nucleophilic ferrate salt Bu4N[Fe(CO)3(NO)] (TBA[Fe]) is able to catalyze the direct trifluoromethylation of aldehydes and ketones using Me3SiCF3 as a trifluoromethylating agent. Interception of the C–Si σ-bond activation using allylic acetates allows for a tandem trifluoromethylation–allylation of electron-deficient olefins. The higher activity of acetate in the C–Si bond activation and the selective
亲核高铁酸盐Bu 4 N [Fe(CO)3(NO)](TBA [Fe])能够使用Me 3 SiCF 3作为三氟甲基化剂催化醛和酮的直接三氟甲基化。使用烯丙基乙酸酯拦截C-Siσ键活化可实现电子不足的烯烃的串联三氟甲基化-烯丙基化。乙酸盐在C-Si键活化中的较高活性以及对烯丙基乙酸盐的选择性铁催化活化是这种空前的三组分偶联反应的先决条件。
Oxidation of α-trifluoromethyl and non-fluorinated alcohols<i>via</i>the merger of oxoammonium cations and photoredox catalysis
作者:Vincent A. Pistritto、Joshua M. Paolillo、Kathryn A. Bisset、Nicholas E. Leadbeater
DOI:10.1039/c8ob01063c
日期:——
present an alcoholoxidation strategy to access α-trifluoromethyl ketones (TFMKs) merging catalytic oxoammonium cation oxidation with visible-light photoredox catalysis. This work uses 4-acetamido-(2,2,6,6-tetramethyl-piperidin-1-yl)oxyl as an organic oxidant capable of generating TFMKs in good yields. The methodology serves as an improvement over previous reports of an analogous oxidation strategy requiring