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Thermal isomerization of the isoxazole ring and rearrangement processes in the mass spectra of 3-aryl-5-methylisoxazole-4-carboxylic acids

โœ Scribed by K. K. Zhigulev; R. A. Khmel'nitskii; M. A. Panina


Book ID
112441756
Publisher
Springer US
Year
1974
Tongue
English
Weight
239 KB
Volume
10
Category
Article
ISSN
0009-3122

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โœ Kalevi Pihlaja; Hikmet Agirbas; Pauliina Valtamo ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 134 KB

The fragmentation behaviour of ten 3,4-disubstituted 1,2,4-oxadiazole-5(4H)-thiones and seven 3,4-disubstituted 1,2,4-thiadiazole-5(4H)-ones studied here confirmed the earlier observations about the partial rearrangement of the former after ionization into the latter before further fragmentation. In