反应详情

温度

125 °C

5 g. 4-cyano-4'-n-pentylbiphenyl in a mixture of 90 ml. ethylene glycol, 18 ml. water and 3.2 g. sodium hydroxide are heated while stirring to 125° C. for 8 hours. After cooling, the reaction mixture is filtered, the residue suspended in 50 ml. ethanol and acidified with 5% hydrochloric acid to a pH of about 2. The reaction mixture is further stirred for 4 hours at room temperature, then filtered and the residue washed with ethanol. The 4-(4-n-pentylphenyl)-benzoic acid obtained is recrystallized from chloroform; m.p. 174° C., S/N 200° C., K. 254° C.

1. temperatureAfter cooling
2. filtrationthe reaction mixture is filtered
3. stirringThe reaction mixture is further stirred for 4 hours at room temperature
4. filtrationfiltered
5. washthe residue washed with ethanol