Dichloromethane → Dimethyl terephthalate

反応式

[C:1]([OH:12])(=[O:11])[C:2]1[CH:10]=[CH:9][C:5]([C:6]([OH:8])=O)=[CH:4][CH:3]=1.[C:13](Cl)(Cl)=[O:14].Cl[CH2:18]Cl>C(N(CC)CC)C>[C:6]([O:14][CH3:13])(=[O:8])[C:5]1[CH:4]=[CH:3][C:2]([C:1]([O:12][CH3:18])=[O:11])=[CH:10][CH:9]=1

参加物

実験手順

Following the general procedure in Example 1 for the preparation of the diacid chloride, 10.13 parts of terephthalic acid were added to a mixture of 14.7 parts triethylamine and 14.4 parts phosgene in 200 parts dry dichloromethane at 25° to 30° C. The ratio of equivalents of triethylamine base/COOH acid group was 1.19. After carrying out the reaction and esterifying the resulting diacid chloride by the procedure described in Example 1, no dimethyl terephthalate was isolated. Instead, 100% recovery of unreacted terephthalic acid was obtained.