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CAS No.: | 2991-28-8 |
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Name: | 2,5-Difluorobenzoic acid |
Article Data: | 9 |
Molecular Structure: | |
Formula: | C7H4F2O2 |
Molecular Weight: | 158.104 |
Synonyms: | 2,5-difluorobenzoate;2,5-Difluorobenzoicacid; |
EINECS: | 221-060-6 |
Density: | 1.432 g/cm3 |
Melting Point: | 132-134 °C(lit.) |
Boiling Point: | 244.7 °C at 760 mmHg |
Flash Point: | 101.8 °C |
Solubility: | Insoluble in water. |
Appearance: | white crystalline powder |
Hazard Symbols: | Xi |
Risk Codes: | 36/37/38 |
Safety: | 26-37/39 |
PSA: | 37.30000 |
LogP: | 1.66300 |
Conditions | Yield |
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With n-butyllithium 1) hexane, Et2O, 2 min, -78 deg C. 2) ether; Yield given. Multistep reaction; |
Conditions | Yield |
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With sec.-butyllithium 1.) THF, -78 deg C, 0.5 h, 2.) THF, a) -78 deg C, 15 min, b) from -78 deg C to RT; Yield given. Multistep reaction; |
2,3,6-trifluorobenzoic acid
A
3-fluorobenzoic acid
B
benzoic acid
C
2,5-difluorobenzoic acid
Conditions | Yield |
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With ammonia; sodium at -45℃; for 0.25h; Reduction; Hydrodefluorination; Title compound not separated from byproducts; | A 9 % Spectr. B 9 % Spectr. C 16 % Spectr. |
Conditions | Yield |
---|---|
With potassium permanganate Oxidation; |
Conditions | Yield |
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Multi-step reaction with 2 steps 2: KMnO4 View Scheme |
Conditions | Yield |
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Multi-step reaction with 3 steps 1.1: BuLi / tetrahydrofuran / -70 °C 1.2: tetrahydrofuran 2.1: 9 percent Spectr. / Zn; NH3 / -45 °C 3.1: 16 percent Spectr. / Na; NH3 / 0.25 h / -45 °C View Scheme | |
Multi-step reaction with 3 steps 1.1: BuLi / tetrahydrofuran / -70 °C 1.2: tetrahydrofuran 2.1: 12 percent Spectr. / Na; NH3 / 0.25 h / -45 °C 3.1: 16 percent Spectr. / Na; NH3 / 0.25 h / -45 °C View Scheme |
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1.1: BuLi / tetrahydrofuran / -70 °C 1.2: tetrahydrofuran 2.1: 16 percent Spectr. / Na; NH3 / 0.25 h / -45 °C View Scheme |
2,3,4,6-tetrafluorobenzoic acid
2,5-difluorobenzoic acid
Conditions | Yield |
---|---|
Multi-step reaction with 2 steps 1: 9 percent Spectr. / Zn; NH3 / -45 °C 2: 16 percent Spectr. / Na; NH3 / 0.25 h / -45 °C View Scheme | |
Multi-step reaction with 2 steps 1: 12 percent Spectr. / Na; NH3 / 0.25 h / -45 °C 2: 16 percent Spectr. / Na; NH3 / 0.25 h / -45 °C View Scheme |
Conditions | Yield |
---|---|
With hydrogenchloride In sodium hypobromide; water |
Conditions | Yield |
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With water In chlorobenzene at 28℃; Equilibrium constant; Further Variations:; Temperatures; |
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2,5-Difluorobenzoic acid(2991-28-8) is also named as Benzoic acid, 2,5-difluoro-;2,5-Difluorobenzic acid;2-chloro-6-flurobenzyl cyanide;2,5-Difluorobenzoic;2,5-Difluorobenzoic acid 98%;2,5-Difluorobenzoicacid98%,and so on.2,5-Difluorobenzoic acid(2991-28-8) is usually white powder.
CAS: 2991-28-8
Molecular Formula: C7H4F2O2
MW: 158.1
EINECS: 221-060-6
Molecular structure:
Melting point: 132-134 °C(lit.)
BRN: 973351