| Identification | More | [Name]
2-Amino-4,5-difluorobenzoic acid | [CAS]
83506-93-8 | [Synonyms]
2-AMINO-4,5-DIFLUOROBENZOIC ACID
4,5-DIFLUOROANTHRANILIC ACID
BUTTPARK 49\07-41
4,5-difluoroanthranilic acid (2-amino-4,5-difluorobenzoic acid) | [EINECS(EC#)]
627-164-1 | [Molecular Formula]
C7H5F2NO2 | [MDL Number]
MFCD00077509 | [Molecular Weight]
173.12 | [MOL File]
83506-93-8.mol |
| Chemical Properties | Back Directory | [Melting point ]
181-185 °C
| [Boiling point ]
326.8±42.0 °C(Predicted) | [density ]
1.536±0.06 g/cm3(Predicted) | [storage temp. ]
Keep in dark place,Inert atmosphere,Room temperature | [form ]
Liquid | [pka]
4.54±0.10(Predicted) | [color ]
Clear colorless to straw | [BRN ]
2834162 | [CAS DataBase Reference]
83506-93-8(CAS DataBase Reference) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing . | [WGK Germany ]
3
| [Hazard Note ]
Irritant | [HazardClass ]
IRRITANT | [HS Code ]
29224999 |
| Hazard Information | Back Directory | [Chemical Properties]
Beige solid | [Uses]
2-Amino-4,5-difluorobenzoic acid is a benzoic acid derivative used as an intermediate in icotinib. icotinib is an effective and highly selective oral epidermal growth factor receptor tyrosine kinase inhibitor (EGFR-TKI) for the treatment of patients with advanced non-small-cell lung cancer (NSCLC) who have failed prior chemotherapy. | [reaction suitability]
reaction type: solution phase peptide synthesis | [Synthesis]
General procedure for the synthesis of 2-amino-4,5-difluorobenzoic acid from 4,5-difluoro-2-nitrobenzoic acid: 4,5-difluoro-2-nitrobenzoic acid (447 mg, 2.2 mmol) was added to a suspension of methanol (10 mL) containing 20% palladium/carbon hydroxide [50% (w/w) wet type, 40 mg]. The reaction mixture was stirred at room temperature for 2 hours under hydrogen atmosphere. Upon completion of the reaction, the catalyst was removed by diatomaceous earth filtration and the filtrate was concentrated to afford 2-amino-4,5-difluorobenzoic acid (380 mg, yield: 100%). | [References]
[1] Patent: WO2003/106435, 2003, A1. Location in patent: Page 290; 291; 332 |
|
|