| Identification | More | [Name]
2,3-DIFLUORO-5-(TRIFLUOROMETHYL)PYRIDINE | [CAS]
89402-42-6 | [Synonyms]
2,3-DIFLUORO-5-(TRIFLUOROMETHYL)PYRIDINE | [Molecular Formula]
C6H2F5N | [MDL Number]
MFCD04972837 | [Molecular Weight]
183.08 | [MOL File]
89402-42-6.mol |
| Questions And Answer | Back Directory | [Description]
2,3-Difluoro-5-(trifluoromethyl)pyridine is a useful research chemical. | [Uses]
2,3-Difluoro-5-(trifluoroMethyl)pyridine is a heterocyclic compound and can be used as a pharmaceutical intermediate. |
| Chemical Properties | Back Directory | [Melting point ]
-20°C | [Boiling point ]
104°C | [density ]
1,47 g/cm3 | [refractive index ]
1.3860-1.3900 | [Fp ]
28°C | [storage temp. ]
Inert atmosphere,2-8°C | [form ]
clear liquid | [pka]
-5.28±0.20(Predicted) | [color ]
Colorless to Light yellow to Light orange | [InChI]
InChI=1S/C6H2F5N/c7-4-1-3(6(9,10)11)2-12-5(4)8/h1-2H | [InChIKey]
XIFCGIKPAAZFFS-UHFFFAOYSA-N | [SMILES]
C1(F)=NC=C(C(F)(F)F)C=C1F | [CAS DataBase Reference]
89402-42-6(CAS DataBase Reference) |
| Safety Data | Back Directory | [Hazard Codes ]
Xi | [Risk Statements ]
R10:Flammable. | [Safety Statements ]
S16:Keep away from sources of ignition-No smoking . | [RIDADR ]
1993 | [Hazard Note ]
Harmful | [HazardClass ]
IRRITANT | [HS Code ]
2933399990 |
| Hazard Information | Back Directory | [Synthesis]
The general procedure for the synthesis of 2,3-dichloro-5-trifluoromethylpyridine from 2,3-dichloro-5-trifluoromethylpyridine is as follows: 1500 mL of DMSO, 363 g of cesium fluoride, and 8 g of potassium carbonate were added to a 5000 mL reaction flask and heated in an oil bath. Concentrate and cool 600 mL of DMSO under reduced pressure to below 80 °C. Under nitrogen protection, 318 g (1.58 mol) of 2,3-dichloro-5-trifluoromethylpyridine was added to the reaction system and the reaction was carried out at about 110 °C for 48 hours. After completion of the reaction, 600 mL of water was added to the yellow liquid for liquid-liquid separation. The organic phase was dried with anhydrous magnesium sulfate and filtered to give a crude product of 188 g. The 100-102 °C fractions were collected by distillation to give 139 g of 2,3-difluoro-5-trifluoromethylpyridine in 47.6% yield. | [References]
[1] Patent: CN104628679, 2018, B. Location in patent: Paragraph 0061; 0064; 0065
[2] Patent: US2008/221327, 2008, A1. Location in patent: Page/Page column 6; 9 |
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