2-Bromo-3,4-dioxymethylene-5-methoxymethyl benzoate
Cinnamyl bromide
CAS: 4392-24-9
Molecular Formula: C9H9Br
2-Bromo-3,4-dioxymethylene-5-methoxymethyl benzoate - Names and Identifiers
2-Bromo-3,4-dioxymethylene-5-methoxymethyl benzoate - Physico-chemical Properties
| Molecular Formula | C9H9Br |
| Molar Mass | 197.07 |
| Density | 1.332g/mLat 25°C(lit.) |
| Melting Point | 26-29°C(lit.) |
| Boling Point | 103°C22mm Hg(lit.) |
| Flash Point | 190°F |
| Water Solubility | Soluble in methanol. Insoluble in water. |
| Vapor Presure | 0.247mmHg at 25°C |
| Appearance | Crystallization |
| Color | White to slightly yellow-beige |
| BRN | 605833 |
| Storage Condition | 2-8°C |
| Sensitive | Light Sensitive |
| Refractive Index | n20/D 1.621(lit.) |
| MDL | MFCD00000245 |
| Physical and Chemical Properties | Needle-like crystals. Melting point 31-32 ℃, boiling point 130 ℃(1.33kPa),106-108 ℃(0.53kPa). |
2-Bromo-3,4-dioxymethylene-5-methoxymethyl benzoate - Risk and Safety
| Hazard Symbols | C - Corrosive |
| Risk Codes | 34 - Causes burns |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| UN IDs | UN 3261 8/PG 2 |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 8-19 |
| HS Code | 29039990 |
| Hazard Class | 8 |
| Packing Group | II |
2-Bromo-3,4-dioxymethylene-5-methoxymethyl benzoate - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| use | bromine cinnamate can be used as a pharmaceutical intermediate. Pharmaceutical intermediates. |
| production method | cinnamyl alcohol is obtained by bromination. Put cinnamyl alcohol, pyridine and gasoline into a dry reaction pot. Add phosphorus tribromide dropwise under stirring to keep the reaction temperature at about 20 ℃. After adding, raise the temperature to 60-70 ℃ and keep the temperature for 2 hours. Cool to below 30 ℃, drop an appropriate amount of ice water, and divide it into layers. The gasoline layer was washed with water and 5% sodium bicarbonate solution once respectively, and then washed with water until neutral. The solvent gasoline and pyridine were removed, namely cinnamyl bromide, with 95.3% yield. |
Last Update：2024-04-09 20:02:46
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