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Mass spectral fragmentation pattern of 5-methyl-4-[(phenylamino)methylene]-2,4-dihydro-3h-pyrazol-3-one and its 2-methyl and 2-phenyl derivatives

โœ Scribed by Neil G. Keats; Jean E. Rockley; Lindsay A. Summers

Book ID
112126639
Publisher
Journal of Heterocyclic Chemistry
Year
1982
Tongue
English
Weight
239 KB
Volume
19
Category
Article
ISSN
0022-152X

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The title compound 3 was obtained during the rearrangement of isoxazol-5-yl hydrazine 1 to 1 -aminopyrazolone 2 at \(115^{\circ}\). X-ray analysis of the corresponding benzylidene derivative allowed us to achieve the structure assignment.