Abstract
AbstractThe synthesis of crystalline 1‐(2‐pyrimidyl)‐4‐(3, 4‐methylenedioxybenzyl)‐piperazin methanesulfonate (ET 495) labelled with 14C fixed on the piperazine nitrogen N(4) has been realized in five steps from barium carbonate 14C; Specific activity of the final product: 32,8 mCi/mmol (110 m̈Ci/mg); radiochemical purity: around 99%. The mass spectrum of the labelled compound is in agreement with the chemical structure and the labelling position expected.
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