344-72-9
Ethyl 2-amino-4-(trifluoromethyl)-1,3-thiazole-5-carboxylate
CAS: 344-72-9
Molecular Formula: C7H7F3N2O2S
344-72-9 - Names and Identifiers
344-72-9 - Physico-chemical Properties
| Molecular Formula | C7H7F3N2O2S |
| Molar Mass | 240.2 |
| Density | 1.479 |
| Melting Point | 170 °C |
| Boling Point | 81.4°C (rough estimate) |
| Flash Point | 153.2°C |
| Vapor Presure | 0.000174mmHg at 25°C |
| pKa | 0.08±0.10(Predicted) |
| Storage Condition | Room Temprature |
| Refractive Index | 1.507 |
| MDL | MFCD00153147 |
344-72-9 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| 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. |
| Hazard Class | IRRITANT |
| Toxicity | LDLo ivn-mus: 75 mg/kg CBCCT* 6,142,54 |
344-72-9 - Reference Information
| Introduction | 2-amino-4-(tribromomethyl)-5-thiazole ethyl carboxylate is an organic intermediate, which can be prepared from acetoethyl trifluoroacetate through a two-step reaction. |
| preparation method | 11.3 grams (84 millimoles) of sulfuryl chloride are added dropwise to a methylene chloride solution (100 ml) containing trifluoroacetate acetoethyl XXIII114.1 grams (76.9 millimoles), which is pre-cooled to 0 degrees Celsius within 30 minutes, and stirred at room temperature overnight, the reaction solution is washed with saturated sodium bicarbonate and saturated sodium chloride solution respectively, the organic layer is collected, the organic layer is collected, the anhydrous sodium sulfate is dried, and the pink oil is concentrated to obtain 3-chlorotrifluoroacetate acetoethyl XXIV7.84 g, The yield is 45.2%; in a 100 ml round bottom flask, add 40 ml of ethanol and 2.44g of thiourea (32.1 mmol), stir and heat to reflux until thiourea is dissolved, 7.0g (32.1 mmol) 3-chlorotrifluoroacetate acetoethyl XXIV was added and refluxed overnight. After completion, concentrate the ethanol to obtain a yellow solid crude product, wash with a saturated sodium carbonate solution, and filter to obtain 1.75 grams of yellow solid 2-amino -4-(tribromomethyl)-5-thiazole carboxylic acid ethyl ester. |
| category | toxic substances |
| toxicity classification | highly toxic |
| acute toxicity | vein-mouse LDL0:75 mg/kg |
| flammability hazard characteristics | flammability; toxic nitrogen oxides and sulfur oxide smoke generated at high temperature |
| storage and transportation characteristics | warehouse ventilation and low temperature drying |
| > extinguishing agent | dry powder, foam, sand, carbon dioxide, misty water |
| EPA chemical information | information provided by: ofmpub.epa.gov (external link) |
Last Update：2024-04-09 21:01:54
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