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CAS No. : | 1122-17-4 | MDL No. : | MFCD00005520 |
Formula : | C4Cl2O3 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | AGULWIQIYWWFBJ-UHFFFAOYSA-N |
M.W : | 166.95 | Pubchem ID : | 70728 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
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 |
---|---|---|
With ammonia; In acetic acid; at 108℃; for 1.5h; | General procedure: To suspension of 16.7 g (0.1 mol) of dichloromaleic anhydride in 60 g of glacial acetic acid was added dropwise 0.1 mol of the corresponding amine. The mixture was stirred for 30 min at 85 and for 90 min at 108. Then the mixture was cooled while stirred to 10, the precipitate was filtered off, washed with water, and dried in a vacuum at 60. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
99.2% | In water; | EXAMPLE 4 10g (0.06 mol) of 2,3-dichloromaleic anhydride was dissolved in 200 ml of water. Then to the resulting solution 5.55g (0.05 mol) of 4-fluoroaniline was added dropwise over a period of 5 min. at room temperature under agitation. The mixture was then allowed to react for 2 hours at reflux temperatures. Upon cooling the reaction mixture, precipitated crystal was separated by filtration to obtain 12.9g of N-(4-fluorophenyl)-2,3-dichloromaleimide melting at 240-243 C (not corrected) at a yield of 99.2%. An anaylsis by gas chromatography showed the product had a purity of 99.3%. |
99.1% | In water; | EXAMPLE 5 5.55g (0.05 mol) of 4-fluoroaniline was emulsified in 150 ml of water. Then to the resulting emulsion 10g (0.06 mol) of 2,3-dichloromaleic anhydride in 50 ml of water was added dropwise over a period of 30 min. at room temperatures under agitation. The mixture was then allowed to react at reflux temperatures. Upon cooling the reaction mixture, a crystal was removed out, which was separated by filtration to obtain 12.9g of N-(4-fluorophenyl)-2,3-dichloromaleimide melting at 240-243 C (not corrected) at a yield of 99.1%. An analysis by gas chromatography showed the product had a purity of 98.6%. |
98.4% | In water; | EXAMPLE 2 10g (0.06 mol) of 2,3-dichloromaleic anhydride was dissolved in 100 ml of water. Then, to the resulting solution 5.55g (0.05mol) of 4-fluoroaniline was added dropwise over a period of 5 min. at room temperatures under agitation. The mixture was allowed to react for 2 hours at 80 C. Upon cooling the reaction mixture, a crystal was separated out, which was then separated by filtration to obtain 12.8g of N-(4-fluorophenyl)-2,3-dichloromaleimide melting at 239-242 C (not corrected) at a yield of 98.4%. An analysis by gas chromatography showed the product had a purity of 98.7%. |
91.5% | In water; | EXAMPLE 3 10g (0.06 mol) of 2,3-dichloromaleic anhydride was dissolved in 100 ml of water. Then to the resulting solution 5.55g (0.05 mol) of 4-fluoroaniline was added dropwise over a period of 5 min. at room temperatures under agitation. The mixture was then allowed to react for 15 hours at 60 C. Upon cooling the reaction mixture, precipitated crystal was separated by filtration to obtain 11.9g of N-(4-fluorophenyl)-2,3-dichloromaleimide melting at 239-242 C (not corrected) at a yield of 91.5%. An analysis by gas chromatography showed the product had a purity of 97.9%. |
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