Other grades of this product :
| 2,5-OXAZOLIDINEDIONE Basic information |
| 2,5-OXAZOLIDINEDIONE Chemical Properties |
| Melting point | 120 °C (dec.) (lit.) | | density | 1.469±0.06 g/cm3(Predicted) | | storage temp. | -20°C | | pka | 9.32±0.20(Predicted) | | CAS DataBase Reference | 2185-00-4 |
| 2,5-OXAZOLIDINEDIONE Usage And Synthesis |
| Preparation | Into a suspension of finely ground glycine (15 g) in dry dioxane (750 mL), phosgene was introduced in a fine stream at 45–50 °C with efficient agitation. A clear solution was obtained after 5 h. This solution was filtered to remove unreacted glycine (1.7 g), and the dioxane was then removed under reduced pressure at a temperature below 40 °C with protection from moisture. The residue was treated with dry diethyl ether (100 mL), and the crystals of 2,5-oxazolidinedione were collected by filtration and dried over P2O5 in a vacuum desiccator. The crude product so obtained, 16 g (89%), was recrystallized from ethyl acetate/petroleum ether to yield 14.3 g (77.2%) of pure material, which showed no melting point because of polymerization. | | Preparation | Phosgene was passed in a fine stream into a suspension of finely ground glycine (15 g) in dry dioxane (750 mL) at 45–50 ℃ with efficient agitation. A clear solution was obtained after 5 h. This solution was filtered to remove unreacted glycine (1.7 g), and the dioxane was then removed under reduced pressure at a temperature below 40 ℃ under exclusion of moisture. The residue was treated with dry diethyl ether (100 mL), and the crystals of 2,5-oxazolidinedione were collected by filtration and dried over P2O5 in a vacuum desiccator. The crude product thus obtained, 16 g (89%), was recrystallized from ethyl acetate/petroleum ether to yield 14.3 g (77.2%) of pure material, which showed no melting point because of polymerization. |
| 2,5-OXAZOLIDINEDIONE Preparation Products And Raw materials |
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