Abstract The behavior of a series of 2-(alkylamino) benzoic acid derivatives and related heterocylic systems has been investigated using electron impact mass spectrometry and fragmentation pathways have been formulated. Deuterium-labeled and 13 C-labeled compounds were used in this study. An interesting rearrangement of the alkylamino compounds, in which the alkyl substituent is incorporated into a fulvene ion, was observed ...
