反应详情

A solution of 4-{3-[3-[2-(1-Cyclohexenyl)ethyl]-4-oxo-2-thiazolidinyl]propyl}benzoic acid (3.7 g., 0.01 mole) in trifluoroacetic acid (20 ml.) is allowed to stand at 25° C. for 4 hours. Excess trifluoroacetic acid is then removed by evaporation at reduced pressure. The oily residue is dissolved in a solution of sodium hydroxide (2.0 g., 0.05 mole) in water (40 ml.). The basic solution is acidified with 2 N hydrochloric acid. The title compound precipitates as a solid. Recrystallization from acetonitrile-water yields the purified title compound, m.p. 147°-148° C.

1. customExcess trifluoroacetic acid is then removed by evaporation at reduced pressure
2. customThe title compound precipitates as a solid
3. customRecrystallization from acetonitrile-water
4. customyields the
5. custompurified title compound, m.p. 147°-148° C.