4,4'-Oxydiphthalic anhydride synthesis
- Product Name:4,4'-Oxydiphthalic anhydride
- CAS Number:1823-59-2
- Molecular formula:C16H6O7
- Molecular Weight:310.21
7717-76-2
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Yield:1823-59-2 90%
Reaction Conditions:
with bathophenanthroline in N,N-dimethyl acetamide;toluene; for 12 h;Reflux;
Steps:
30 Example 25:
General procedure: In a 25ml three-necked flask, add 4,7-diphenyl-1,10-phenanthroline (17mg, 2mol%), 4-methylphthalic acid (450mg, 2.5mmol), and finally add solvent toluene (9mL) ) and N,N-dimethylacetamide (1 ml) to help dissolve, the mixture was heated under azeotropic reflux conditions for 12 hours, and the reflux liquid was passed through molecular sieves to remove water. After the reaction was completed, the mixture was cooled and filtered to remove the solvent to obtain 4-methylphthalic anhydride in a yield of 97%.
References:
CN114213372,2022,A Location in patent:Paragraph 0045-0050
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