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CAS No. : | 38870-89-2 | MDL No. : | MFCD00000728 |
Formula : | C3H5ClO2 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | JJKWHOSQTYYFAE-UHFFFAOYSA-N |
M.W : | 108.52 | Pubchem ID : | 96623 |
Synonyms : |
|
Signal Word: | Danger | Class: | 8,3 |
Precautionary Statements: | P501-P240-P210-P233-P234-P243-P241-P242-P264-P280-P370+P378-P390-P303+P361+P353-P301+P330+P331-P363-P304+P340+P310-P305+P351+P338+P310-P403+P235-P406-P405 | UN#: | 2920 |
Hazard Statements: | H226-H314-H290 | Packing Group: | Ⅱ |
GHS Pictogram: |
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* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
88.2% | for 2.5 h; Reflux | In step S10, 300 kg of methanol and 190 kg of chloroacetic acid (2 kmol) are added to a reaction tank of 3000 L, stirring is started, and the mixture is heated until the material is substantially dissolved, and then 790 kg (4.1 kmol) of 28percent sodium methoxide is added, and the temperature is raised to 60 ° C, and the temperature is 1 After the reaction is completed, the methanol is recovered under reduced pressure at a temperature of 78 ° C and a vacuum of 0.098 MPa;Step S20, after the pressure is reduced, the temperature is lowered to 40 ° C, 1500 kg of toluene is added, 100 kg (0.72 kmol) of phosphorus trichloride is added dropwise at 45 ° C, and the dropwise addition is completed in 30 minutes, and the temperature is kept at 55 ° C for 1.0 hour;Step S30, 410kg (95percent, 1.88kmol), adding time for 30 minutes, adding reflux and holding for 2 hours, medium-controlled DN-(2,6-dimethylphenyl)alanine methyl ester ≤0.5percent, medium After the control is passed, the temperature is lowered to 40 ° C, water is added 800 kg of water to wash twice, layering, toluene is recovered under reduced pressure, the temperature is 109 ° C, and the degree of vacuum is 0.098 MPa;Step S40, after decompression is completed, the temperature is lowered to 60 ° C, 700 kg of water, 450 kg of ethylene glycol are added, the temperature is lowered to 0 ° C for 2 hours, filtered, the filtrate is desolvated, the temperature is 70 ° C, the degree of vacuum is 0.098 Mpa, and the like, no droplets flow out. The temperature is lowered to 70 ° C to obtain the product optically active metalaxyl. |