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Updated: Jun 16, 2026

Green Synthesis of Quinoline-Based Ionic Liquid
Published on: September 27, 2024
Electron ionisation mass spectral study of 2-(2-carboxy-4, 5-dimethoxyphenyl)-6,7-dimethoxyisoquinolinium inner salt
E Wyrzykiewicz1, A Czyrski, T Hermann
1Faculty of Chemistry, Adam Mickiewicz University, Poznań, Poland.
Abstract:
The electron ionization mass spectrum of 2-(2-carboxy-4,5-dimethoxyphenyl)-6,7-dimethoxyisoquinolinium inner salt 1 is discussed and general fragmentation routes of its molecular ion are proposed. Comparison of the data obtained for 1 with the EI-MS data of metameric protopine alkaloids (allocryptopine, argemexicaine A, argemexicaine B) and the pseudobenzyloisoquinoline alkaloid taxilamine allows a differentiation between these metamers. The data will be useful for the identification of metabolites of alkaloids of these types in biological matrices.
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