| Identification | Back Directory | [Name]
5-CHLORO-3,1-BENZOXAZIN-2,4-DIONE | [CAS]
20829-96-3 | [Synonyms]
LAQU-005
5-CHLORO-3,1-BENZOXAZIN-2,4-DIONE
5-chloro-1H-3,1-benzoxazine-2,4-dione
5-chloro-2H-3,1-benzoxazine-2,4(1H)-dione
5-CHLORO-1H-BENZO[D][1,3]OXAZINE-2,4-DIONE
2H-3,1-Benzoxazine-2,4(1H)-dione, 5-chloro- | [Molecular Formula]
C8H4ClNO3 | [MDL Number]
MFCD09032504 | [MOL File]
20829-96-3.mol | [Molecular Weight]
197.58 |
| Chemical Properties | Back Directory | [Melting point ]
272.5-272.9 °C | [density ]
1.540±0.06 g/cm3(Predicted) | [storage temp. ]
under inert gas (nitrogen or Argon) at 2-8°C | [form ]
lumpy powder | [pka]
10.27±0.20(Predicted) | [color ]
Faint pink |
| Hazard Information | Back Directory | [Synthesis]
In a 250 mL round-bottomed flask under nitrogen protection, 2-amino-6-chlorobenzoic acid (11.69 g, 68 mmol) was dissolved in 100 mL of 1,4-dioxane. After cooling the reaction system to 0°C, phosgene (36 mL, 68 mmol) was slowly added through a dropping funnel. The reaction mixture was stirred at 0°C for 24 h, followed by natural warming to 23°C (room temperature). Upon completion of the reaction, the resulting white solid product was collected by filtration and washed sequentially with 1,4-dioxane and ether to afford 5-chloro-1H-benzo[d][1,3]oxazine-2,4-dione (12.5 g, 93% yield). | [References]
[1] Organic Process Research and Development, 2007, vol. 11, # 4, p. 674 - 680
[2] Patent: US2007/249605, 2007, A1. Location in patent: Page/Page column 8
[3] Patent: US2004/162285, 2004, A1
[4] Patent: US2004/87577, 2004, A1. Location in patent: Page 65
[5] Patent: US2004/167123, 2004, A1. Location in patent: Page/Page column 98 |
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