Name | 4'-Bromoacetophenone |
Synonyms | 4'-Bromoacetophene 4-Bromoacetophenone p-Bromoacetophenone p-Bromo acetophenone 4'-Bromoacetophenone 1-Acetyl-4-bromobenzene 1-(4-Bromophenyl)ethanone |
CAS | 99-90-1 |
EINECS | 202-799-3 |
InChI | InChI=1/C8H7BrO/c1-6(10)7-2-4-8(9)5-3-7/h2-5H,1H3 |
Molecular Formula | C8H7BrO |
Molar Mass | 199.04 |
Density | 1.64 |
Melting Point | 48-52℃ |
Boling Point | 255℃ |
Flash Point | >230 °F |
Water Solubility | Soluble in Chloroform. Insoluble in water. |
Appearance | White crystal |
Storage Condition | Room Temprature |
Refractive Index | 1.5540 (estimate) |
MDL | MFCD00000105 |
Physical and Chemical Properties | Density 1.64 melting point 48-52°C boiling point 255°C |
Use | Used as a pharmaceutical Intermediate |
Hazard Symbols | Xi - Irritant |
Risk Codes | R36/38 - Irritating to eyes and skin. |
Safety Description | S22 - Do not breathe dust. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
UN IDs | UN 3261 8/PG 2 |
use
Preparation
At present, the preparation methods of p-bromoacetophenone mainly include Friedel-Crafts acylation method, 1-(4-bromophenyl) ethanol oxidation method and p-bromoethylbenzene oxidation method, etc. Among them, p-bromoethylbenzene oxidation method is divided into chemical oxidation method and molecular oxygen oxidation method. As an oxidant with low price, clean and pollution-free and good atomic economy, the method of preparing p-bro.
chemical properties
Color flake crystals. Melting point 51 ℃, boiling point 255.5 ℃(97.9kPa),130 ℃(1.46kPa),117 ℃(0.93kPa). Soluble in ethanol, ether, glacial acetic acid, benzene, carbon disulfide and petroleum ether, insoluble in water. Easy to volatilize with water vapor.
production method
Bromobenzene and acetic anhydride are obtained by reacting in the presence of aluminum trichloride. Add bromobenzene and dry carbon disulfide into the reactor, put into powdered anhydrous aluminum trichloride, heat until reflux starts, stop heating, add acetic anhydride dropwise, reflux for 1h after adding, evaporate carbon disulfide, pour the reactant into the mixture of hydrochloric acid and ice water while hot, filter dry, and distill under reduced pressure to obtain the finished product.
Melting point 108-110°C(lit.)
boiling point 255 c (lit.)
density 1.64
refractive index 1.5540 (estimate)
flash point> 230 f
storage conditions Store below 30 c.
solubility methanol: 0.1 g/mL, clear
morphological Crystals or Crystalline Flakes
color white to light yellow
water solubility Soluble in Chloroform. Insoluble in water.
Merck 14,1403
BRN 386015
InChIKey WYECURVXVYPVAT-UHFFFAOYSA-N
NIST chemical information
Ethanone, 1-(4-bromophenyl)-(99-90-1) |
EPA chemical information
Ethanone, 1-(4-bromophenyl)- (99-90-1) |