Helvetica chimica acta

Die massenspektrometrische Wasserabspaltung aus makrocyclischen Amino??ketonen

H Benz, M Hesse

Index: Benz, Herbert; Hesse, Manfred Helvetica Chimica Acta, 1993 , vol. 76, # 4 p. 1636 - 1648

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Citation Number: 2

Abstract

Macrocyclic 0x0-lactams containing an N-alkylamino side chain are stable natural products. Their electronimpact mass spectra are characterized by intensive [M-H20]+ signals, the molecular ion signal itself is missing. Under electrospray ionization conditions, on the other hand, the [M+ 1]+ ion is the only detected signal. The loss of water is explained in terms of an internal (thermal) Schtff-base formation, leading to a eg bicyclo [ll. 9.4]-system. The ...

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