Preparation of 3H‐labelled apomorphine, N‐n‐propylnorapomorphine, and O, O‐dipivaloylapomorphine

Abstract
Apomorphine and N‐n‐propylnorapomorphine were tritiated using trifluoroacetic acid‐ tritiated water mixtures. This provides a route to the synthesis of tritiated O,O‐dipivaloylapomorphine. Deuterium exchange and NMR studies indicate that exchange only involves protons at the C‐8 and C‐9 positions.