Caractérisation de nouveaux dérivés et analogues de la nétropsine et identification de leurs intermédiaires de synthèse par spectrométrie de masse FAB

The fast‐atom bombardment (FAB) mass spectra of a series of netropsin derivatives and analogues were examined in positive‐ion and when necessary negative‐ion modes. Behaviour of these derivatives was related to that of oligopeptides. Some compounds protected by t ‐butoxycarbonyl groups were also investigated using this technique and showed characteristic fragmentations.