Molecular Formula | C5HCl3N2O |
Molar Mass | 211.43 |
Density | 1.713±0.06 g/cm3(Predicted) |
Melting Point | 131-132℃ |
Boling Point | 278.6±35.0 °C(Predicted) |
Flash Point | 122.289°C |
Water Solubility | Slightly soluble in water. |
Vapor Presure | 0.004mmHg at 25°C |
Appearance | Solid |
Color | White to brown |
pKa | -8.75±0.39(Predicted) |
Storage Condition | Inert atmosphere,Store in freezer, under -20°C |
Refractive Index | 1.629 |
MDL | MFCD02257700 |
UN IDs | UN2811 |
Hazard Class | 6.1 |
Uses | 2,4, 6-dichloro-5-pyrimidine formaldehyde is an important pharmaceutical intermediate, 2,4, 6-dichloro-5-pyrimidine formaldehyde can react with hydrazine hydrate to produce 2-chloropyrazolopyrimidine, 2-chloropyrazolopyrimidine is an important new drug intermediate, 2,4, 6-dichloro-5-pyrimidine formaldehyde can continue to react to form 2-chloropyrazolopyrimidine, its aldehyde group can be oxidized to carboxylic acid, and the 2,4,6-position chlorine can undergo nucleophilic substitution reaction to form pyrimidine derivatives. |
Preparation | 2,4, 6-dichloro-5-pyrimidine formaldehyde is an important pharmaceutical intermediate. At present, it is reported that the synthesis methods of 2,4, 6-dichloro-5-pyrimidine formaldehyde are mainly divided into the following categories: 1. Using 2,4, 6-dichloro-5-bromo (iodopyrimidine) as the starting material, After reacting with Grignard reagent or butyl lithium, the target molecule is obtained by reacting with DMF, methyl formate or N-formylmorpholine, the reaction temperature in this synthesis method generally requires a low temperature of -78°C, and the yield is relatively low; 2. Using uracil as the starting material, it reacts with formaldehyde under the catalysis of barium hydroxide to generate 5-hydroxymethyluracil, and further The oxidation of the oxidant manganese dioxide obtains uracil-5-formaldehyde, and then the target molecule is obtained in three steps through the trichloromethane reaction. The molar yield of the three-step reaction is 45%, and the weight yield is 33.2%. |