[<sup>11</sup>C]CO<sub>2</sub> to [<sup>11</sup>C]CO conversion mediated by [<sup>11</sup>C]silanes: a novel route for [<sup>11</sup>C]carbonylation reactions
作者:Carlotta Taddei、Salvatore Bongarzone、Abdul Karim Haji Dheere、Antony D. Gee
DOI:10.1039/c5cc02095f
日期:——
A novel chemical methodology is described for the conversion of [11C]CO2 to [11C]CO via silane derivatives. The released [11C]CO is used for radiosynthetic applications.
further applied to label [11C]benzoic acid (RCP≥99%, TE>91%), [11C]methyl benzoate (RCP≥99%, TE>93%) and [11C]phthalide (RCP≥99%, TE>88%). A set of pharmaceuticals was finally radiolabelled using non‐optimized conditions. Excellent yields were obtained for the histamine‐3 receptor radioligand [11C]AZ13198083, the oncology drug [11C]olaparib and the dopamine D2 receptor radioligand [11C]raclopride, whereas
synthesizer prototype. All measured radiochemicalyields exceeded 37%, and the 11CO trapping efficiency was generally above 90%, except for the Suzukicoupling where the trapping efficiency was 80%. This high‐pressure synthesizer using [11C]carbon monoxide as the labeling precursor is easy to operate allowing for 11C‐carbonylation reactions to be performed in a high yield and in a routinely fashion.
Microwave heating technology was applied for the palladium-mediated 11C-carbonylation of aryl halides and triflates at ambient pressure using xantphos as supporting ligand. Improvedyields were observed for the 11C-aminocarbonylation of electron-deficient aryl halides in comparison to thermal heating and the approach even allowed the use of an aryl chloride as substrate. The scope of this reaction
Rapid Carbon‐11 Radiolabelling for PET Using Microfluidics
作者:Philip W. Miller、Hélène Audrain、Dirk Bender、Andrew J. deMello、Antony D. Gee、Nicholas J. Long、Ramon Vilar
DOI:10.1002/chem.201002644
日期:2011.1.10
Labels all around: A gas–liquid microfluidic reactor is used for the first time to efficiently perform [11C]carbon monoxide carbonylation reactions for the preparation of 11C‐radiolabelled amide molecules within a short timeframe (<15 min; see scheme).