1,4-Dimethyl-2-fluorobenzene
2-Fluoro-p-Xylene
CAS: 696-01-5
Molecular Formula: C8H9F
1,4-Dimethyl-2-fluorobenzene - Names and Identifiers
| Name | 2-Fluoro-p-Xylene |
| Synonyms | 2-Fluoro-p-Xylene 1,4-Dimethyl-2-fluorobenzene Benzene, 2-fluoro-1,4-dimethyl- |
| CAS | 696-01-5 |
1,4-Dimethyl-2-fluorobenzene - Physico-chemical Properties
| Molecular Formula | C8H9F |
| Molar Mass | 124.16 |
| Density | 0.983 |
| Melting Point | -6℃ |
| Boling Point | 144.7℃ |
| Flash Point | 30.9℃ |
| Storage Condition | Sealed in dry,Room Temperature |
| Physical and Chemical Properties | Chemical liquid. Boiling point 137-138 ℃. |
| Use | Uses for organic synthesis, can be used to prepare phase transfer catalyst 2-fluoro-4-methylbenzyltrimethylammonium bromide. |
1,4-Dimethyl-2-fluorobenzene - Upstream Downstream Industry
1,4-Dimethyl-2-fluorobenzene - Production method
It is obtained from 2, 5-dimethylaniline [95-78-3] via the Siman (Schiemann) reaction. Add 400g of 40% fluoroboric acid into 50ml of water, cool, control the temperature at about 0 ℃, slowly add 72.5g,2, 5-dimethylaniline under stirring, then add sodium nitrite solution (40g of sodium nitrite dissolved in 120ml of ice water), let stand and filter. Wash with a small amount of methanol-ether (1:1) and ether once each, drain, and decompose at room temperature (not higher than 30 ℃). The decomposition products were distilled by steam to separate the oil layer, dried with anhydrous calcium chloride and fractionated, and the fraction at 145-147 ℃ was collected to obtain 59g of 2-fluoro-1, 4-xylene with a yield of 80%.
Last Update：2024-04-10 22:29:15
1,4-Dimethyl-2-fluorobenzene - Reference Information
| chemical properties | liquid. Boiling point 137-138 ℃. |
| Use | For organic synthesis, it can be used to prepare phase transfer catalyst 2-fluoro-4-methylbenzyltrimethylammonium bromide. |
| production method | from 2, 5-dimethylaniline [95-78-3] via Siman (Schiemann) reaction. Add 400g of 40% fluoroboric acid into 50ml of water, cool, control the temperature at about 0 ℃, slowly add 72.5g,2, 5-dimethylaniline under stirring, then add sodium nitrite solution (40g of sodium nitrite dissolved in 120ml of ice water), let stand and filter. Wash with a small amount of methanol-ether (1:1) and ether once each, drain, and decompose at room temperature (not higher than 30 ℃). The decomposition products were distilled by steam to separate the oil layer, dried with anhydrous calcium chloride and fractionated, and the fraction at 145-147 ℃ was collected to obtain 59g of 2-fluoro-1, 4-xylene with a yield of 80%. |
Last Update：2024-04-09 15:16:37
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View History
1,4-Dimethyl-2-fluorobenzene
Zinc(II) octaethylporphine
(5-methoxy-2-methyl-1H-indol-3-yl)acetate
trimethyl(trimethylsilylmethylsulfanylmethyl)silane
Bromo(2-naphthalenyl)magnesium
1-甲基-1H-吡唑-3-甲醛
Zinc(II) octaethylporphine
(5-methoxy-2-methyl-1H-indol-3-yl)acetate
trimethyl(trimethylsilylmethylsulfanylmethyl)silane
Bromo(2-naphthalenyl)magnesium
1-甲基-1H-吡唑-3-甲醛
Raw Materials for 1,4-Dimethyl-2-fluorobenzene
Downstream Products for 1,4-Dimethyl-2-fluorobenzene
Benzene, 1-(fluoromethyl)-4-methyl-
3-Fluoro-4-methylbenzoic acid
2-Chloro-1,4-dimethylbenzene
p-Fluorotoluene
P-XYLENE
2,5-Dimethylphenol
3-Fluoro-4-methylbenzoic acid
2-Chloro-1,4-dimethylbenzene
p-Fluorotoluene
P-XYLENE
2,5-Dimethylphenol