[C:1]([OH:12])(=[O:11])[C:2]1[CH:10]=[CH:9][CH:8]=[C:4]([C:5]([OH:7])=O)[CH:3]=1.[Cl:13][CH2:14]Cl.[C:16]([Cl:19])(Cl)=[O:17]>N1C=CC=CC=1>[C:5]([O:17][CH3:16])(=[O:7])[C:4]1[CH:8]=[CH:9][CH:10]=[C:2]([C:1]([O:12][CH3:14])=[O:11])[CH:3]=1.[C:16]([Cl:19])(=[O:17])[C:4]1[CH:8]=[CH:9][CH:10]=[C:2]([C:1]([Cl:13])=[O:12])[CH:3]=1Following the general procedure of Example 9, a slurry of 7.46 parts isophthalic acid in 80 parts dry dichloromethane was added to a mixture of 7.91 parts pyridine and 9.77 parts phosgene in 210 parts dry dichloromethane at 25° to 30° C. The ratio of equivalents of pyridine base/COOH acid group was 1.10. After carrying out the reaction and esterifying the resulting diacid chloride by the procedure described in Example 1 there was obtained a 100% yield of dimethyl isophthalate corresponding to a 100% yield of isophthaloyl chloride formed initially in the reaction.
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