反应详情

A mixture of 8.14 g (0.455 mol) of 4-(p-aminophenyl)butyric acid, 34.1 ml of benzyl alcohol and 8.65 g (0.455 mol) of p-toluene sulfonic acid hydrate in 115 ml of carbon tetrachloride is heated overnight at reflux with the solvent return through a tower of Drierite (ca. 30 ml of partially powdered indicating Drierite). The partially cooled mixture is diluted to 600 ml with ethyl ether to give a precipitate which is collected to give 4-(4-aminophenyl)butyric acid benzyl ester, p-toluenesulfonate; m.p. 114°-115° C. This is used in the next reaction without further purification.

1. temperatureis heated overnight
2. customto give a precipitate which
3. customis collected