Abstract
AbstractSelectively ring‐labelled terodilines (N‐tert‐butyl‐1‐methyl‐3,3‐diphenylpropylamine; 1) were prepared by homogeneous catalytic exchange of aromatic hydrogens for 3H and 2H. In addition, terodilines specifically labelled with 14C, 3H or 2H were prepared from the appropriate 1‐methyl labelled 4,4‐diphenylbutan‐2‐ol, by treating the corresponding tosylates with tert‐butylamine.Emepronium bromide (N‐ethyl‐N,N,1‐trimethyl‐3,3‐diphenylpropylammonium bromide; 2) specifically labelled with 14C or 2H were similarly prepared by treating the labelled tosylates with N‐ethylmethylamine or dimethylamine, followed by quaternization with methyl bromide or ethyl bromide, respectively.
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