反应详情

The free acid compound of Example 4 was suspended in 100 ml of ethanol and placed in a 300 ml round-bottomed flask equipped with magnetic stirrer and condenser. Twenty ml of dimethoxyethane were added to make the compound go into solution. After most of the solid had gone into solution, NH4OH was added. There was no discernible heat evolution. Solvents were evaporated. The resulting solid (title product) was refluxed in a mixture of hexane and ethanol and was then recovered by filtration. Yield 4.3 g (m.p. 165°-166°)

1. customplaced in a 300 ml round-bottomed flask
2. customequipped with magnetic stirrer and condenser
3. additionwas added
4. customSolvents were evaporated
5. temperatureThe resulting solid (title product) was refluxed in a mixture of hexane and ethanol
6. filtrationwas then recovered by filtration