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CAS RN: 96-31-1 | 产品编码: D0289
1,3-Dimethylurea
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技术规格
| Appearance | White to Almost white powder to crystaline |
| Purity(GC) | min. 98.0 % |
| Melting point | 102.0 to 108.0 °C |
| Solubility in Water | almost transparency |
物性（参考值）
| 熔点 | 105 °C |
| 沸点 | 270 °C |
| 水溶性 | 可溶 |
| 溶解性（可溶于） | 醇 |
| 溶解性（不溶于） | 乙醚 |
GHS
| 象形图 |
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| 信号词 | Warning |
| 危险性说明 | H373 : May cause damage to organs through prolonged or repeated exposure. |
| 防范说明 | P501 : Dispose of contents/ container to an approved waste disposal plant. P260 : Do not breathe dust/ fume/ gas/ mist/ vapors/ spray. P314 : Get medical advice/ attention if you feel unwell. |
相关法规
| RTECS# | YS9868000 |
运输信息
| HS编码* | 2924.19-000 |
应用
Sodium- and Ammonia-Free Birch Reduction by Electroreduction
Experimental procedure: An electrochemical cell with magnesium as the anode and galvanized steel wire as the cathode is added to a substrate (0.1 mmol, 1.0 eq.), 1,3-dimethylurea (0.3 mmol, 3.0 eq), tripyrrolidinophosphine oxide (1.0 mmol, 10 eq.), and 1.5 mol/L THF solution of LiBr (500 µL). The reaction mixture is added to THF (3 mL) and is purged with argon. Electrolysis is initiated at a cell ampere of 10 mA at room temperature. After full consumption of substrate, the cell is washed with diethyl ether, and solvent is removed in vacuo. To residue solution is added diethyl ether and solution of Rochelle salt, and then is stirred until two clear layers formed. The organic layer is separated, and the aqueous layer is extracted twice with diethyl ether. The combined organic layers are dried over anhydrous MgSO4. After the organics removed in vacuo, the residue is purified by short silica colum (elution: ethyl acetate) to give product.
References
- Scalable and safe synthetic organic electroreduction inspired by Li-ion battery chemistry
应用
Sodium- and Ammonia-Free Birch Reduction by Electroreduction
Experimental procedure: An electrochemical cell with magnesium as the anode and galvanized steel wire as the cathode is added to a substrate (0.1 mmol, 1.0 eq.), 1,3-dimethylurea (0.3 mmol, 3.0 eq), tripyrrolidinophosphine oxide (1.0 mmol, 10 eq.), and 1.5 mol/L THF solution of LiBr (500 µL). The reaction mixture is added to THF (3 mL) and is purged with argon. Electrolysis is initiated at a cell ampere of 10 mA at room temperature. After full consumption of substrate, the cell is washed with diethyl ether, and solvent is removed in vacuo. To residue solution is added diethyl ether and solution of Rochelle salt, and then is stirred until two clear layers formed. The organic layer is separated, and the aqueous layer is extracted twice with diethyl ether. The combined organic layers are dried over anhydrous MgSO4. After the organics removed in vacuo, the residue is purified by short silica colum (elution: ethyl acetate) to give product.
References
- Scalable and safe synthetic organic electroreduction inspired by Li-ion battery chemistry
应用
Synthesis of Dihydropyrimidines via Biginelli Reaction (Three-component Reaction)
References
- Searching for a direct preparation of dihydropyrimidine-5-carboxamides under Biginelli reaction conditions
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