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Studies in organic mass spectrometry—X: The fragmentation of substituted 1,3‐cyclo‐pentanediones and 1,2,4‐cyclopentanetriones, related to hop bitter acids
Author(s) -
Cant E.,
Vandewalle M.
Publication year - 1972
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210060608
Subject(s) - alkyl , chemistry , mass spectrum , fragmentation (computing) , hop (telecommunications) , mass spectrometry , side chain , stereochemistry , organic chemistry , medicinal chemistry , chromatography , computer network , polymer , computer science , operating system
Abstract The Mass spectra of some 1,3‐cyclopentanediones and 1,2,4‐cyclopentanetriones, related to compounds encountered in the chemistry of hops bitter constituents have been determined. Methyl substituted compounds mostly show ring degradation, while for longer alkyl groups and acyl groups, fragmentations in the side chain carry most of the total ionization. When both alkyl (> 2C) and acyl substituents are present, fragmentations in the alkyl group always occur before those in the acyl side chain. The observed degradation processes are useful for the interpretation of the spectra of hop bitter acids and derived products.