- Synthesis of condensed nitrofuroxanes using hydroxylamine
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The possibility of preparing condensed nitrofuroxanes using hydroxylamine was examined.
- Klyuchnikov,Starovoitov,Khairutdinov,Golovin
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p. 853 - 854
(2007/10/03)
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- The reactions of 4-nitrobenzofuroxan with amines in DMSO; kinetic and equilibrium studies
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Kinetic and equilibrium studies are reported for the reactions of six aliphatic amines with 4-nitrobenzofuroxan, 3, in dimethyl sulfoxide. Rapid reaction at the 5-position to yield σ-adducts is followed by slower formation of the thermodynamically more stable adducts at the 7-position. 1H NMR spectra are reported. The results are compared with those for reaction of the amines with 1,3,5-trinitrobenzene, 2. These reactions involve the initial formation of zwitterionic intermediates which transfer an amino proton to a second molecule of amine. It is found that the proton-transfer step is less likely to be rate determining in the reactions of 3 than of 2; this may be due to the lower steric requirements of 3.
- Crampton, Michael R.,Delaney, Jeannette,Rabbitt, Lynsey C.
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p. 2473 - 2480
(2007/10/03)
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- AMBIPHILIC FUROXAN RING. BENZOFUROXAN OXIDATION BY PERACID AND REDUCTION BY COPPER
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Monopersulfuric acid, trifluoroperacetic acid and hydrogen peroxide in polyphosphonic acid, or with selenium dioxide in t-butyl alcohol, or in tetramethylene sulfone have each oxidized benzofuroxan into o-dinitrobenzene.Monopersulfuric acid oxidized 4-nitrobenzofuroxan into 1,2,3-trinitrobenzene (80percent) and 4,6-dinitrobenzofuroxan into 1,2,3,5-tetranitrobenzene (99percent); hydrogen peroxide in polyphosphoric acid was moderately efficient for the latter oxidation.Copper in acidified ethanol transformed 4,6-dinitrobenzofuroxan into picramide quantitatively.
- Boyer, Joseph H.,Huang, Chrongbao
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p. 1233 - 1240
(2007/10/02)
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- Kinetic studies of the reactions of 4-nitrobenzofuroxan with cyanide ion and isopropoxide ion in isopropanol
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Kinetic studies of the reactions in isopropanol of 4-nitrobenzofuroxan with cyanide ion and isopropoxide ion have been carried out over the temperature range 15.0 to 35.0 deg C.For both bases, the first species identifiable using stopped-flow reaction techniques is postulated to be a C-7 ?-complex of 4-nitrobenzofuroxan and base.Specific rate constants and activation parameters for the formation of these ?-complexes are compared to corresponding data relating to the formation of cyanide ion and isopropoxide ion - ?-complexes of 1,3,5-trinitrobenzene in isopropanol.
- Moir, Michael E.,Norris, Albert R.
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p. 1691 - 1696
(2007/10/02)
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