N.m.r. and i.r. spectroscopy, acetylation, benzoylation, and oxidation with periodate confirmed that the rearrangement product of dehydro-L-ascorbic acid phenylosazone is 1-phenyl-4-phenylazo-3-(L-threo-1,2,3-trihydroxypropyl)pyrazolin-5-one. A number of p-substituted derivatives of this compound and their acylation products have also been prepared.
H. E. Khadem and S. H. E. Ashry, J. Chem. Soc. C, 1968, 2248 DOI: 10.1039/J39680002248
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