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A Mass Spectrometric Investigation of Some Tricyclic Antidepressants and Their Synthons
Author(s) -
Rubello Albion,
Volpe Giulio,
Favretto Donato,
Traldi Pietro
Publication year - 1996
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19960715)10:9<1097::aid-rcm580>3.0.co;2-0
Subject(s) - chemistry , synthon , mass spectrum , imipramine , clomipramine , protonation , electron ionization , tricyclic , desipramine , fast atom bombardment , mass spectrometry , deuterium , ion , ionization , analytical chemistry (journal) , organic chemistry , chromatography , medicine , physics , alternative medicine , pathology , quantum mechanics , neuroscience , biology , hippocampus , pharmacology , antidepressant
The electron impact and fast‐atom bombardment mass spectrometric behaviour of five tricyclic antidepressants (desipramine, imipramine, clomipramine, trimipramine and lofepramine) and of their synthons (iminodibenzyl and 3‐chloroiminodibenzyl) have been studied in detail with the aid of metastable‐ion studies, deuterium labelling experiments and accurate mass measurements. Electron ionization leads to spectra mainly comprising fragments related to the alkyl‐amino chain, when present. The two synthons exhibit molecular species in an isomeric form. The comparison of fast‐atom bombardment mass spectra of the free bases with those of their corresponding hydrochlorides reveals unusual differences indicating that the protonation mechanism occurring in the gas phase is somehow different from the one taking place in solution.