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Massenspektren neuer Phloroglucide, insbesondere solcher mit Valerylseitenketten
Author(s) -
Lounasmaa M.,
Widén C.J.,
Reichstein T.
Publication year - 1973
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19730560337
Subject(s) - chemistry , side chain , mass spectrum , phloroglucinol , stereochemistry , computational chemistry , mass spectrometry , organic chemistry , chromatography , polymer
Mass spectra of phloroglucinol derivatives recently isolated from African Dryopteris species are presented. Phloroglucides with n ‐valeryl side chain were found in these ferns for the first time. In the mass spectra they show strong peaks corresponding to loss of propene (C 3 H 6 ) produced by McLafferty rearrangement, as shown in model compounds. Aside of the rottleron change (discussed formerly) this must be considered in order to avoid wrong interpretation, particularly when mass spectra are used to analyse mixtures of homologues, as usually present in the plants. If valeryl side chains are present other methods must be used therefore to measure the amount or show the absence of lower homologues with acetyl side chains.