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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

✍ Scribed by E. Cant; M. Vandewalle

Publisher: John Wiley and Sons
Year: 1972
Tongue: English
Weight: 487 KB
Volume: 6
Category: Article
ISSN: 1076-5174
DOI: 10.1002/oms.1210060608

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✦ Synopsis

The mass spectra of some 1,3-~yclopentanediones and 1,2,4-~ycIopentanetriones, 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.

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Studies in organic mass spectrometry—XI.

Studies in organic mass spectrometry—XI. The fragmentation of hop bitter acids derivatives having a five membered ring structure

✍ E. Cant; M. Vandewalle; M. Verzele 📂 Article 📅 1972 🏛 John Wiley and Sons 🌐 English ⚖ 584 KB

## Abstract The mass spectra of the hops derived humulinic acids, isohumulones and hulupones are discussed. The fragmentations are in accordance with those found for model compounds.