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Oxidative Kupplung CH-acider Verbindungen mit p-Phenylendiaminen. V. Massenspektrometrische Fragmentierung von 4-substituierten 3-Methyl-1-phenyl-pyrazolin-5-onen

✍ Scribed by Dr. H. Wilde; Doz. Dr. R. Herzschuh; Dipl.-Chem. P. Lepom; Prof. Dr. G. Mann

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
253 KB
Volume
323
Category
Article
ISSN
1615-4150

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✦ Synopsis

Oxidative Coupling of CH‐acid Compounds with p‐Phenylenediamines. V. Mass Spectrometric Fragmentation of 4‐Substituted 3‐Methyl‐1‐phenyl‐pyrazolin‐5‐ones

The mass spectra of 3‐methyl‐1‐phenyl‐pyrazolin‐5‐one 1 and 4‐substituted derivatives 2–18 have been studied and the fragmentation mechanisms are discussed. The major cleavages take place in three ways, whose significance is related to the properties of the substituents. The mass spectra permit the determination of the structure, purity and stability of the substituted colour couplers.

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