Vp. Shevchenko et al., Synthesis of regiospecifically labeled physiologically active compounds with a high molar radioactivity using gaseous tritium, RADIOCHEMIS, 42(2), 2000, pp. 191-195
Conditions of synthesis of tritium-labeled 16 alpha,17 alpha-cyclopentanopr
ogesterone and isobutyric and palmitic acids with a high molar radioactivit
y were examined. The degree of labeling was studied as influenced by the re
action rime and temperature. Isotope exchange, as compared to hydrogenation
, ensures several times higher molar radioactivity of the resulting organic
acids.