- Synthesis of mesoionic 3-aryl(hetaryl)-1,2,3,4-oxatriazol-5-ones based on N-aryl-and N-hetarylhydrazones of bromonitroformaldehyde
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Dehydrobromination of N-arylhydrazones of bromonitroformaldehyde (at 20°C) in the presence of alkali and ammonium salts of strong mineral acids, HNO3, silica gel, and Al2O3 forms mesoionic 3-aryl-1,2,3,4-oxatriazol-5-ones
- Shevelev,Dalinger,Gulevskaya,Cherkasova,Vinogradov,Ugrak,Starosotnikov
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p. 363 - 373
(2007/10/03)
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- CONVERSION OF ARYLHYDRAZONES OF BROMONITROFORMALDEHYDE AND ARYLAZATRINITROMETHANES TO 3-ARYL-1,2,3,4-OXATRIAZOLIUM-5-ONES
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Mesoionic 3-aryl-1,2,3,4-oxatriazolium-5-ones rather than 1,4-diaryl-dihydro-3,6-dinitro-1,2,3,4-tetrazines, as previously assumed, are formed when arylhydrazones of bromonitroformaldehyde and arylazotrinitromethanes are heated in acetic acid.
- Martynova, M. N.,Pevzner, M. S.,Smorygo, N. A.,Serebryakova, N. M.
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p. 1238 - 1240
(2007/10/02)
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