Horikawa M, Joy ST, Sharninghausen LS, Shao X, Mapp AK, Scott PJH, Sanford MS. C-H radiocyanation of bioactive molecules
via sequential iodination/copper-mediated cross-coupling.
Chem Sci 2023;
14:12068-12072. [PMID:
37969612 PMCID:
PMC10631240 DOI:
10.1039/d3sc03948j]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Accepted: 10/20/2023] [Indexed: 11/17/2023] Open
Abstract
This report describes a net C-H radiocyanation reaction for the transformation of electron rich (hetero)aromatic substrates into 11CN-labeled products. Electrophilic C(sp2)-H iodination of the (hetero)arene with N-iodosuccinimide is followed by Cu-mediated radiocyanation with K11CN. This sequence is applied to a variety of substrates, including the nucleobases uracil and cytosine, the amino acids tyrosine and tryptophan, and the peptide LYRAGWRAFS, which undergoes selective C-H radiocyanation at the tryptophan (W) residue.
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