2-溴甲基苯甲酸甲酯 、
4-(4-氨基苯)丁酸乙酯 、
苯胺 在
4-[4-(1-oxo-1,3-dihydro-isoindol-2-yl)-phenyl]-butyric acid ethyl ester 作用下,
以to obtain 4-[4-(1-oxo-1,3-dihydro-isoindol-2-yl)-phenyl]-butyric acid ethyl ester (Compound 19) as a white powdery substance的产率得到4-[4-(1-oxo-1,3-dihydro-isoindol-2-yl)-phenyl]-butyric acid ethyl ester