reagents (trifluoromethyl)(4-nitrophenyl)bis(carbomethoxy)methylide (1g) and (trifluoromethyl)(3-chlorophenyl)bis(carbomethoxy)methylide (1j) through structure-activity study was described. Under mild conditions, reagent 1g reacted with β-ketoesters and silyl enol ethers to give α-trifluoromethylated-β-ketoesters or α-trifluoromethylated ketones in high yields. In addition, reagent 1g could serve as
Phosphovanadomolybdic acid catalyzed direct C–H trifluoromethylation of (hetero)arenes using NaSO<sub>2</sub>CF<sub>3</sub> as the CF<sub>3</sub> source and O<sub>2</sub> as the terminal oxidant
A direct C–H trifluoromethylation of (hetero)arenesusing NaSO2CF3 (Langlois' reagent) as the CF3 source and O2 as the terminal oxidant has been developed. In the presence of catalytic amounts of phosphovanadomolybdic acids, such as H6PV3Mo9O40, various kinds of substituted benzenes and heteroaromatic compounds could be converted into the corresponding trifluoromethylated products.
已经开发了使用NaSO 2 CF 3(Langlois试剂)作为CF 3源和O 2作为末端氧化剂对(杂)芳烃进行直接C–H三氟甲基化。在催化量的磷钒钼酸如H 6 PV 3 Mo 9 O 40的存在下,各种取代的苯和杂芳族化合物可以转化为相应的三氟甲基化产物。
Copper-Catalyzed Trifluoromethylation of (Hetero)aryl Boronic Acid Pinacol Esters with YlideFluor
作者:Jing Liu、Yisa Xiao、Jian Hao、Qilong Shen
DOI:10.1021/acs.orglett.3c00206
日期:2023.2.24
A copper-catalyzed trifluoromethylation of (hetero)arylboronic acidpinacolesters with YlideFluor for the preparation of trifluoromethylated (hetero)arenes was described. The reaction conditions are mild and compatible with a broad range of functional groups. Heteroaryl boronic acidpinacolesters could also be trifluoromethylated in high yields. Application of this protocol for trifluoromethylation
Direct C–H Trifluoromethylation of Glycals by Photoredox Catalysis
作者:Bang Wang、De-Cai Xiong、Xin-Shan Ye
DOI:10.1021/acs.orglett.5b03016
日期:2015.11.20
A Mild, efficient, and practical transformation for the direct C-H,trifluotoni-ethylation:of glycals under visible light has been reported for the first time This reaction employed fac-Ir3+ (ppy)(3) as the photocatalyst) Urnemo's reagent as the CF3 source, and a household blue Letp or sunlight as the light source. Glycals bearing both withdrawing and -donating protective groups performed this reaction smoothly: This visible ligilit-mediated trifluomethylation reaction was highlighted by the trifluoromethlyation of the biologically important Neu2en moiety.