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- W1968676311 abstract "The title hept-1-enitol (2) reacted with aldehyde methyl(or phenyl)hydrazones in refluxing methanol or butyl acetate to give 1-methyl(or phenyl)-5-(penta-O-acetyl-d-galacto-pentitol-1-yl)pyrazoles in good (for 1-methylpyrazoles) or moderate yields (for 1-phenylpyrazoles). The O-deacetylated products were obtained in high yields. A Michael-type adduct was obtained for the reactions of 2 with p-tolualdehyde and p-nitrobenzaldehyde methylhydrazones, and its role as an intermediate was proved by conversion into the pyrazole derivative under the conditions of the above reactions. Only for the reaction with formaldehyde phenylhydrazone was the observed regioselectivity abnormal. The structures proposed were confirmed by spectral data." @default.
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- W1968676311 date "1991-03-01" @default.
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- W1968676311 title "1-Methyl(or phenyl)-5-(penta-O-acetyl-d-galacto-pentitol-1-yl)pyrazoles from the reactions of 3,4,5,6,7-penta-O-acetyl-1,2-dideoxy-1-nitro-d-galacto-hept-1-enitol with aldehyde methyl(or phenyl)hydrazones" @default.
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- W1968676311 doi "https://doi.org/10.1016/0008-6215(91)80121-3" @default.
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