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- W2004421577 abstract "1,4-Diphenyl-3-carbethoxy-5-aminopyrazole yielded 1,4-diphenyl-5-aminopyrazole by hydrolysis and decarboxylation. The phenylhydrazone of ethyl phenyloxalacetate gave a pyrazolone which was transformed into 1,4-diphenyl-3-amino-5-pyrazolone. The 2,4-diphenyl-3-amino-5-pyrazolone was obtained from ethyl phenylcyanoacetate and phenylhydrazine by heating in acetic acid. 4-Alkyl-3-hydroxy- and 3-amino-5-pyrazolones and 4,4-dialkyl-3-oxo- and 3-imino-5-pyrazolones, substituted in position 2 by carbanilino or α- or β-naphthyl groups, were prepared from ethyl mono- or disubstituted malonates and cyanoacetates, 4-phenylsemicarbazide, and α- and β-naphthylhydrazines. Ultraviolet absorption spectra were determined in neutral and acid solutions." @default.
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- W2004421577 date "1953-07-01" @default.
- W2004421577 modified "2023-10-18" @default.
- W2004421577 title "CONTRIBUTION TO THE STUDY OF PYRAZOLONES" @default.
- W2004421577 doi "https://doi.org/10.1139/v53-090" @default.
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