Rapid Syntheses of [11C]Arylvinyltrifluoromethanes through Treatment of (E)-Arylvinyl(phenyl)iodonium Tosylates with [11C]Trifluoromethylcopper(I)
摘要:
We report a method for labeling arylvinyltrifluoromethanes with carbon-11 (t(1/2) = 20.4 min) as representatives of a new radiolabeled chemotype that has potential for developing radiotracers for biomedical imaging with positron emission tomography. Treatment of (E)-arylvinyl(phenyl)iodonium tosylates (1a - 1k) with [C-11]CuCF3 gave the corresponding [C-11]arylvinyltrifluoromethanes ([C-11]2a-[C-11]2k) in high radiochemical yields (90-97%) under rapid (2 min) and mild (60 degrees C) conditions.
A new method for the synthesis of vinyl trifluoromethyl compounds from α, β‐unsaturated carboxylic acids and CF3SO2Na has been developed. This electrochemical decarboxylative trifluoro‐methylation was found to be highly stereoselective and afforded products in good yields with wide substrate scope under metal‐free and external chemical oxidant‐free conditions.
已开发出一种由α,β-不饱和羧酸和CF 3 SO 2 Na合成乙烯基三氟甲基化合物的新方法。发现这种电化学脱羧三氟甲基化反应具有高度的立体选择性,并且在无金属和无外部化学氧化剂的条件下,可以提供高收率的产品,具有广泛的底物范围。
Palladium Catalyzed Vinyltrifluoromethylation of Aryl Halides through Decarboxylative Cross-Coupling with 2-(Trifluoromethyl)acrylic Acid
作者:Subban Kathiravan、Ian A. Nicholls
DOI:10.1021/acs.orglett.5b00551
日期:2015.4.17
An efficient Pd-catalyzed stereoselective vinyltrifluoromethylation of aryl halides, through decarboxylative cross-coupling with 2-(trifluoromethyl)acrylic acid is described. The ready availability of the starting materials, the high level of functional group tolerance, and excellent E/Z selectivity make this protocol a safe and operationally convenient strategy for efficient synthesis of vinyltrifluoromethyl
Highly Selective Activation of Vinyl C-S Bonds Over Aryl C-S Bonds in the Pd-Catalyzed Coupling of (E)-(β-Trifluoromethyl)vinyldiphenylsulfonium Salts: Preparation of Trifluoromethylated Alkenes and Dienes
作者:Hao Lin、Xicheng Dong、Yuxue Li、Qilong Shen、Long Lu
DOI:10.1002/ejoc.201200758
日期:2012.9
We describe the Suzuki coupling reaction of (E)-(beta-trifluoromethyl)vinyldiphenylsulfoniumsalts with arylboronic acid. The highly efficient and selective reaction provides a useful and mild method for the synthesis of trifluoromethylatedalkenes and dienes. Subsequent DFT studies showed that the oxidative addition transition state of the vinyl CS bond is much more favorable (11.7 kcal?mol1) than
Rapid Syntheses of [<sup>11</sup>C]Arylvinyltrifluoromethanes through Treatment of (<i>E</i>)-Arylvinyl(phenyl)iodonium Tosylates with [<sup>11</sup>C]Trifluoromethylcopper(I)
作者:Susovan Jana、Sanjay Telu、Bo Yeun Yang、Mohammad B. Haskali、Jimmy E. Jakobsson、Victor W. Pike
DOI:10.1021/acs.orglett.0c01705
日期:2020.6.5
We report a method for labeling arylvinyltrifluoromethanes with carbon-11 (t(1/2) = 20.4 min) as representatives of a new radiolabeled chemotype that has potential for developing radiotracers for biomedical imaging with positron emission tomography. Treatment of (E)-arylvinyl(phenyl)iodonium tosylates (1a - 1k) with [C-11]CuCF3 gave the corresponding [C-11]arylvinyltrifluoromethanes ([C-11]2a-[C-11]2k) in high radiochemical yields (90-97%) under rapid (2 min) and mild (60 degrees C) conditions.