**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 me
Massenspektrometrische Fragmentierung von 4-substituierten 5-Hydroxynaphth[2,1-d]1,3-oxathiol-2-onen
✍ Scribed by Dr. P. Lepom; Dr. R. Herzschuh; Dr. H. Wilde; Prof. Dr. G. Mann
- Publisher
- John Wiley and Sons
- Year
- 1984
- Tongue
- English
- Weight
- 355 KB
- Volume
- 326
- Category
- Article
- ISSN
- 1615-4150
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**Oxidative Coupling of CH‐acid Compounds with p‐Phenylenediamines. VIII. Synthesis of 5H‐Benzo[a]phenothiazin‐5‐ones from Naphth[2,1‐d]1,3‐oxathiol‐2‐ones** Reaction of 5‐hydroxynaphth[2,1‐d]1,3‐oxathiol‐2‐ones with N,N‐diethyl‐quinone‐1,4‐diimine leads to 5H‐benzo[a]phenothiazin‐5‐ones **1**–**21
## Abstract 3‐Aryl‐7‐diethylamino‐6‐methyl‐2,2‐bis(trifluormethyl)‐2,3,4,5‐tetrahydro‐1,3‐oxazepin‐5‐one **1** isomerisieren beim mehrstündigen Erhitzen auf 140–160 °C zu 2‐[3‐Aryl‐2,2‐bis(trifluormethyl)‐1,3‐oxazolidin‐5‐yliden]‐__N,N__‐diethylpropionsäureamiden **2.** Dagegen unterliegen die 4‐Ar