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CAS No. : | 367-25-9 | MDL No. : | MFCD00007648 |
Formula : | C6H5F2N | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | CEPCPXLLFXPZGW-UHFFFAOYSA-N |
M.W : | 129.11 | Pubchem ID : | 9709 |
Synonyms : |
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Signal Word: | Danger | Class: | 6.1 |
Precautionary Statements: | P261-P280-P305+P351+P338-P311 | UN#: | 2810 |
Hazard Statements: | H227-H302+H312-H315-H319-H331-H335 | Packing Group: | Ⅲ |
GHS Pictogram: |
* 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 |
---|---|---|
0.44 mol | With N-chloro-succinimide In dichloromethane at 10℃; for 2 h; Reflux | 0.5 mol (1.0 eq) of 2,4-difluoroaniline and 200 ml of dichloromethane were charged into a reaction flask,Stir to dissolve all,Control the internal temperature of 10 ~ 15 in 5 batches into 0.55mol (1.1eq) NCS,Feeding finished,Heated to reflux 2h,In the control,Raw material reaction is complete,Add 10percent dilute hydrochloric acid to the bottle to adjust the pH to 6-7,The organic phase is separated,Washed,Rotate to dryness to give 0.44 mol (0.88 eq) of 2,4-difluoro-5-chloroaniline.0.44 mol of 2,4-difluoro-5-chloroaniline was charged into 1.5 mol (3 eq) of 25percent dilute sulfuric acid,Stirring 0.5h,And then into which 0.75mol (1.5eq) times of sodium phosphite,Control the internal temperature of 30 ~ 35 drop 0.5mol (1eq) sodium nitrite aqueous solution,Dripping finished control kettle temperature rise per hour 4 ~ 5 ,The program temperature,Kettle temperature rose to 60 ,Insulation stirring 2h,Static stratification,The organic phase is washed with water again,For steam distillation,The distilled product was separated from the distillation column by distillation of 3,5-difluorochlorobenzene 0.41 mol (0.82 eq)Purity 99.8percent. |