Pyrazole-4,5-dione oximes

Benzyl or n-propyl)-5-methyl-3W-pyrazole-3,4-dione 4-oximes 31a,b were prepared by two routes. Thus, efliyl 3-oxobutanoate 27 was eiflier heated wifli... 

C9H7N3O2 3-Phenyl-1 /f-pyrazole-4,5-dione 4-oxime Gravimetric Cu 3... 

C10H9N3O2 3- Methy I-1 -phenyl- H-pyrazole-4,5-dione 4- oxime Gravimetric Precipitation Cu Bi, Co, Cu, Fe, Sb 3... 

Lanovaya et al. (87JOU1773) (Scheme 17) presented the only example of a benzoylation of an oxime group of a pyrazol-3-one. Thus, pyrazol-4,5-dione 4-oximes 69a,b were treated with benzoyl chloride in pyridine to give the benzoyloxy derivatives 70a,b in good yields. 

Phenylphosphinic acid, P-00163 3-Phenyl-1 -pyrazole-4,5-dione 4-Oxime, in P-00173... 

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