Development of the First Tritiated Tetrazine: Facilitating Tritiation of Proteins
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Tetrazine (Tz)-trans-cyclooctene (TCO) ligation is an ultra-fast and highly selective reaction and it is particularly suited to label biomolecules under physiological conditions. As such, a 3 H-Tz based synthon would have wide applications for in vitro/ex vivo assays. In this study, we developed a 3 H-labeled Tz and characterized its potential for application to pretargeted autoradiography. Several strategies were explored to synthesize such a Tz. However, classical approaches such as reductive halogenation failed. For this reason, we designed a Tz containing an aldehyde and explored the possibility of reducing this group with NaBT 4 . This approach was successful and resulted in [ 3 H]-(4-(6-(pyridin-2-yl)-1,2,4,5-tetrazin-3-yl)phenyl)methan-t-ol with a radiochemical yield of 22 %, a radiochemical purity of 96 % and a molar activity of 0.437 GBq/μmol (11.8 Ci/mmol). The compound was successfully applied to pretargeted autoradiography. Thus, we report the synthesis of the first 3 H-labeled Tz and its successful application as a labeling building block.
Original language | English |
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Article number | e202200539 |
Journal | ChemBioChem |
Volume | 23 |
Issue number | 23 |
Number of pages | 7 |
ISSN | 1439-4227 |
DOIs | |
Publication status | Published - 2022 |
Bibliographical note
© 2022 The Authors. ChemBioChem published by Wiley-VCH GmbH.
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