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- W2097500620 abstract "Compound 2 was obtained as a result of nucleophilic addition of thiosemicarbazide to the activated vinyl group of sulfone 1 and subsequent intramolecular substitutions of the fluorine atoms of the benzene ring in the ortho position with participation of the NH group, and in the meta position with participation of the second nucleophilic center of the thiosemicarbazide, the sulfur atom. We described examples of simultaneous participation of the NH2 group of amines in nucleophilic addition and substitution reactions [1,2]. The reaction proceeds with a four-fold molar excess of thiosemicarbazide in DMF at 70°C. The structure of compound 2 was proven by IR and NMR (H, C, F, and N) spectroscopy. The H, C, F, and N NMR spectra were recorded on a Bruker DPX 400. Operating frequencies: H 400.13 MHz, C 100.61 MHz, F 376.50 MHz, and N 40.54 MHz. The N NMR spectrum, obtained by the DEPT technique with N-H spin-spin coupling constants of 90 Hz, contains only the chemical shifts for the nitrogen atoms directly bonded to protons." @default.
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- W2097500620 date "2005-06-07" @default.
- W2097500620 modified "2023-10-16" @default.
- W2097500620 title "Unexpected Reaction of Thiosemicarbazide with 3,6-Bis(vinylsulfonyl)-1,2,4,5-tetrafluorobenzene." @default.
- W2097500620 cites W2950416928 @default.
- W2097500620 doi "https://doi.org/10.1002/chin.200523170" @default.
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