I. Fellows et al., Simple methods for the labelling of N-methyl amines using isotopically labelled methyl iodide., J LABEL C R, 41(12), 1998, pp. 1127-1143
Methods for the synthesis of isotopically labelled N-methyl amines using th
e target amine and isotopically labelled methyl iodide in a quaternisation/
dequaternisation strategy are described. The method has been further refine
d to allow the synthesis of such amines without any isotopic dilution.