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• W1920512272 abstract "Palladium(II)-mediated oxidative carbonylation reactions have been used to synthesize (11) C-radiolabelled ureas via the coupling of amines with [(11) C]carbon monoxide, in a one-pot process. Following trapping of (11) CO in a solution of copper(I) tris(3,5-dimethylpyrazolyl)borate, homocoupling reactions of primary aliphatic amines proceed in the presence of Pd(PPh3 )2 Cl2 to give the corresponding N,N-disubstituted [(11) C]ureas. Secondary amines do not produce the corresponding N,N,N,N-tetrasubsituted [(11) C]ureas under these conditions. This difference in reactivity allows for the formation of unsymmetrical N,N',N'-trisubstituted [(11) C]ureas using a mixture of a primary amine and a reactive secondary amine. The potential use of this method in positron emission tomography (PET) was demonstrated by the synthesis of the M1 muscarinic acetylcholine receptor radiotracer, [(11) C-carbonyl]GSK1034702." @default.
• W1920512272 created "2016-06-24" @default.
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• W1920512272 date "2013-12-11" @default.
• W1920512272 modified "2023-09-25" @default.
• W1920512272 title "Palladium-mediated oxidative carbonylation reactions for the synthesis of¹¹C-radiolabelled ureas" @default.
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• W1920512272 doi "https://doi.org/10.1002/jlcr.3151" @default.
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