The Use of Lithium Amides in the Palladium-Mediated Synthesis of [Carbonyl-11C]Amides

• Weakly nucleophilic amines were converted into the corresponding lithium amides and used in either one- or two-pot palladium mediated-reactions with [11C]carbon monoxide and aryl iodides. It was found that palladium acyl complexes may be prepared in a separate step and have sufficient lifetime to be used in a subsequent reaction with a nucleophile. This two-pot procedure was used for the labelling synthesis of eleven amides (nine of which are analogues of WAY-100635, a 5-HT1A radioligand) from weakly nucleophilic amines. The results were compared to a direct one-pot procedure using lithium amides. Both approaches extend the scope of palladium-mediated carbonylation using [11C]carbon monoxide and aryl iodides allowing use of weakly nucleophilic amines.

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper -- Andra medicinska och farmaceutiska grundvetenskaper (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Basic Medicine -- Other Basic Medicine (hsv//eng)

Nyckelord

Carbon monoxide

carbonylation

palladium

lithium

amides

Chemistry

Kemi

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