反应详情

温度

60 °C

A solution of the ester (7.87 g, 25 mole) in water (70 g) containing methanol (40 g) was treated with 50% sodium hydroxide (10 g) and heated to 60° C. for 30 minutes. The mixture was neutralized with 3N HCl solution until a precipitate formed (pH~3). The solid was filtered, washed with water, air dried, and recrystallized from 2-propanol to afford (2 crops) 5.12 g (68%) of the title compound as fine colorless needles; mp 186.5°-188.0° C.

1. customformed (pH~3)
2. filtrationThe solid was filtered
3. washwashed with water, air
4. customdried
5. customrecrystallized from 2-propanol