4,6-二甲氧基-2-甲磺酰基嘧啶
4,6-Dimethoxy-2-(methylsulfonyl)pyrimidine
CAS: 113583-35-0
Molecular Formula: C7H10N2O4S
4,6-二甲氧基-2-甲磺酰基嘧啶 - Names and Identifiers
4,6-二甲氧基-2-甲磺酰基嘧啶 - Physico-chemical Properties
| Molecular Formula | C7H10N2O4S |
| Molar Mass | 218.23 |
| Density | 1.317±0.06 g/cm3(Predicted) |
| Melting Point | 129-133°C(lit.) |
| Boling Point | 412.6±48.0 °C(Predicted) |
| Flash Point | 203.3°C |
| Vapor Presure | 1.23E-06mmHg at 25°C |
| Appearance | White to off-white powder |
| pKa | -3.39±0.30(Predicted) |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.497 |
| MDL | MFCD00672151 |
| Physical and Chemical Properties | This product is white powder Crystal, m.p.116 ~ 118 ℃, insoluble in water, soluble in toluene, xylene and other solvents. |
| Use | As a pesticide intermediate, used in the synthesis of salicylic acid pyrimidine series herbicides |
4,6-二甲氧基-2-甲磺酰基嘧啶 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S37/39 - Wear suitable gloves and eye/face protection S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S24/25 - Avoid contact with skin and eyes. |
| WGK Germany | 3 |
| HS Code | 29335990 |
| Hazard Class | IRRITANT |
4,6-二甲氧基-2-甲磺酰基嘧啶 - Reference Information
| use | 4, 6-dimethoxy-2-methylsulfonyl pyrimidine is an intermediate of herbicides sulfuryl, dioxalone, dioxalone, etc. As a pesticide intermediate, used in the synthesis of salicylic acid pyrimidine series herbicides |
| Production method | The preparation method is to add 4, 6-dihydroxy-2-thiomethylpyrimidine and phosphorus oxychloride to the reaction bottle, and react under nitrogen protection For several hours, the amount of phosphorus oxychloride is evaporated under reduced pressure, and the crude product is washed with water to obtain a brown solid of 4, 6-dichloro-2-thiomethylpyrimidine. Then put the pyrimidine in a three-mouth bottle, add sodium methoxide methanol solution, react for several hours, cool and filter, desolve, and recrystallize to obtain a white solid of 4, 6-dimethoxy-2-thiomethylpyrimidine. In another three-mouth bottle, 4, 6-dimethoxy-2-thiomethylpyrimidine was added, a small amount of catalyst was added, and then 30% hydrogen peroxide solution was added. The reaction was carried out at 50 ℃ for several hours. The reactants were extracted with ethyl acetate and desolated to obtain the finished product. |
Last Update：2024-04-09 15:16:47
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