M. Derosa et al., DETECTION OF ELECTROPHILIC AROMATIC-SUBSTITUTION BY ADDITION-ELIMINATION USING NATURAL-ABUNDANCE DEUTERIUM NMR - A PYRROLE EXAMPLE, Journal of the Chemical Society, Chemical Communications, (23), 1993, pp. 1757-1758
Natural abundance H-2 NMR has been used to demonstrate that the reacti
on of 1-methylpyrrole with N-chloroimides occurs by addition-eliminati
on and this method can be applied to other reactions.