| Identification | Back Directory | [Name]
2-AMINO-4,6-DIFLUOROBENZOIC ACID | [CAS]
126674-77-9 | [Synonyms]
BUTTPARK 49\07-42
2-AMINO-4,6-DIFLUOROBENZOIC ACID
Benzoic acid, 2-aMino-4,6-difluoro-
2-AMino-4,6-difluorobenzoic acid 97%
2-Amino-4,6-difluorobenzoic acid ,97%
2-AMino-4,6-difluorobenzoic acid, 6-difluorobenzoic acid
2-Carboxy-3,5-difluoroaniline, 4,6-Difluoroanthranilic acid | [Molecular Formula]
C7H5F2NO2 | [MDL Number]
MFCD03618449 | [MOL File]
126674-77-9.mol | [Molecular Weight]
173.12 |
| Chemical Properties | Back Directory | [Boiling point ]
305.8±42.0 °C(Predicted) | [density ]
1.536 | [storage temp. ]
RT, protect from light | [form ]
wooly crystalline powder | [pka]
3.95±0.10(Predicted) | [color ]
Light yellow/gold | [Sensitive ]
Air Sensitive |
| Hazard Information | Back Directory | [Synthesis]
Stage 3: Synthesis of 2-amino-4,6-difluorobenzoic acid
A solution of sodium hydroxide (6.70 g, 167 mmol) and 30% hydrogen peroxide (6.7 mL) in water (60 mL) was added dropwise to a suspension of the stage 2 product (4.58 g, 25 mmol) in water (125 mL) and the reaction was carried out at 0 °C. Subsequently, the reaction mixture was stirred at room temperature for 20 hours. Upon completion of the reaction, the pH was adjusted to 3 with formic acid (~11 mL, taking care to control the rate of addition to prevent violent foaming), at which point the target compound began to precipitate. The precipitate was collected by filtration and dried in a desiccator using phosphorus pentoxide to give 3.72 g of white solid product (86% yield). The melting point of the product was 198-202 °C. | [References]
[1] Patent: US2008/293749, 2008, A1. Location in patent: Page/Page column 14
[2] Journal of Medicinal Chemistry, 2006, vol. 49, # 22, p. 6465 - 6488
[3] Organic Process Research and Development, 2010, vol. 14, # 5, p. 1078 - 1087 |
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