Thermal cyclization of 4-azido-3-nitropyridines to furoxanes†
作者： Wolfgang Stadlbauer , Werner Fiala , Michaela Fischer , Gerhard Hojas
关键词: Organic chemistry 、 Thermal decomposition 、 Furoxan 、 Nitration 、 Calorimetry 、 Sodium azide 、 Furazan 、 Azide 、 Thermal 、 Chemistry
摘要: 4-Chloro-3-nitro-2-pyridines 3 and 10, obtained from 4-hydroxy-2-pyridones 1 8 after nitration chlorination, gave with sodium azide 4-azido-3-nitropyridines 4 11, which cyclized on thermolysis to furoxans 6 12. Desoxygenation of the furoxan triphenylphosphane furazan 7. Thermal decomposition conditions desoxygenation reaction 7 were studied by differ ential scanning calorimetry (DSC).
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