Reacción #94162

Ecuación de reacción

dimethylaniline

dimethyl terephthalate

terephthalic acid

N,N-dimethyl aniline

phosgene

dichloromethane

→

terephthaloyl chloride

Rendimiento 90.2%

Condiciones de reacción

Tratamiento posterior

1. 1
   Otrothe reaction

Procedimiento

Following the general procedure in Example 1 for the preparation of the diacid chloride, 8.93 parts of terephthalic acid were added to a mixture of 16.47 parts of N,N-dimethyl aniline and 12.8 parts phosgene in 200 parts dry dichloromethane at 25° to 30° C. The ratio of equivalents of dimethylaniline base/COOH acid group was 1.26. After carrying out the reaction and esterifying the resulting diacid chloride by the procedure described in Example 1, 9.87 parts of a solid containing 95.4% dimethyl terephthalate was obtained corresponding to a 90.2% yield of theory of terephthaloyl chloride formed initially in the reaction.

Fuente