反应详情

In a manner analogous to that described in Examples 8 and 9, starting from 3-[3-(4-acetyl-3-hydroxy-2-n-propylphenoxy)-propoxy]-2-cyanoaniline, by reaction with chloro-oxalic acid ethyl ester there is obtained N-{3-[3-(4-acetyl-3-hydroxy-2-n-propylphenoxy)-propoxy]-2-cyanophenyl}-oxamic acid ethyl ester having a melting point of 158°-159°, and, by hydrolysis of that compound, N-{3-[3-(4-acetyl-3-hydroxy-2-n-propylphenoxy)-propoxy]-2-cyanophenyl}-oxamic acid is obtained in the form of the triethanolammonium salt having a melting point of 79°-81°.