The mass spectra of a number of syn- and anti-1-phenylpyrazol-4-yl oximes have been studied.
syn- and anti-Paris where available gave identical mass spectra; although no Beckmann rearrangement occurred, a transfer of the oximino-hydrogen to the pyrazole nucleus with concommittant fission of the side chain was shown to take place.
I. L. Finar and B. J. Millard, J. Chem. Soc. C, 1969, 2497 DOI: 10.1039/J39690002497
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