反应详情

温度

0 °C

A mixture of 4.7 g (9.7 mmols) of ethyl 2-ethoxy-4-[N-{1-(2-piperidino-phenyl)-3-methyl-1-butyl)-aminocarbonylmethyl]-benzoate and 14.7 ml of 1N sodium hydroxide was stirred in 47 ml of ethanol for 2 hours at 60° C., then neutralized with 14.7 ml of 1N hydrochloric acid and cooled to 0° C. The mixture was filtered to remove the precipitated colorless crystals, and the crystals were washed with ice water and with a little ice cold ethanol and then dried at 100° C./1 Torr.

1. filtrationThe mixture was filtered
2. customto remove the precipitated colorless crystals
3. washthe crystals were washed with ice water and with a little ice cold ethanol
4. customdried at 100° C./1 Torr