Synthesis of [Ring‐3H] Dopamine and Fluoro Analogues at High Specific Activity
摘要:
Dopamine and several fluoro analogues were labeled with tritium at high specific activity by a catalytic tritium dehalogenation of polybromo precursors.
Solid-phase synthesis of deuterium- and tritium-labeled dopamine using carbon nanomaterials
作者:V. P. Shevchenko、I. Yu. Nagaev、K. V. Shevchenko、M. G. Chernysheva、G. A. Badun、V. M. Fedoseev、N. F. Myasoedov
DOI:10.1134/s1066362211030192
日期:2011.6
Various procedures for preparing dopamine labeled with deuterium (H-2) and tritium (H-3) were considered. The labeled dopamine into which the hydrogen isotopes were introduced by solid-phase halogenation contained, on the average, 2.8 H-2 (H-3) atoms. The labeled dopamine prepared by solid-phase isotope exchange using nanodiamonds as support contained, on the average, 4.8 H-2 (H-3) atoms. The process was accompanied by the substrate deamination; as a result, the yield of the labeled analog was low (7-10%). Mass spectrometric analysis shows that the phenolic fragments formed by the dopamine deamination undergo dimerization.