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- W2012188194 abstract "The reaction between aryl or heteroarylhydrazines with fluorinated β-diketones (CF 3 COCH 2 COR) yields a variety of 3-, 5-, and 3,5-trifluoromethylpyrazoles and 5-trifluoromethyl-5-hydroxy-Δ 2 -pyrazolines. Twenty-one of such compounds have been isolated and identified by 13 C and 19 F NMR. Together with the results from the literature they provide a comprehensive overview of the reaction. Semi-empirical calculations at the PM3 level have been used to rationalize these results. The outcome that emerges seems to be that the dehydration of a pair of 3,5-dihydroxypyrazolidines kinetically controls the isomer formed.Key words: hydrazines, 1,3-diketones, pyrazolines, pyrazoles, PM3 calculations." @default.
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- W2012188194 date "2000-08-01" @default.
- W2012188194 modified "2023-09-27" @default.
- W2012188194 title "The reaction between hydrazines and β-dicarbonyl compounds: proposal for a mechanism" @default.
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- W2012188194 doi "https://doi.org/10.1139/v00-104" @default.
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