反应详情

Sodium hydride (60% in oil, 0.32 g) was added, at 0° C., to a solution of 5-[3-(4-hydroxy-3-methoxyphenyl]propyl]-2,4-oxazolidinedione (1.0 g) in N,N-dimethylformamide (DMF) (20 ml). The mixture was stirred for one hour at room temperature. To the reaction mixture was then added 4-chloromethyl-2-[(E)-styryl]oxazole (0.87 g), which was stirred for 3.5 hours at 90° C. The reaction mixture was poured into water, which was acidified with 2N HCl, followed by extraction with ethyl acetate. The ethyl acetate layer was washed with water, dried (MgSO4) and concentrated under reduced pressure to yield 5-[3-[3-methoxy-4-[2-[(E)-styryl]-4-oxazolylmethoxy]phenyl]propyl]-2,4-oxazolidinedione (1.1 g, 66%). The product was recrystallized from ethyl acetate-hexane to give colorless prisms, m.p.178-179° C.

1. extractionfollowed by extraction with ethyl acetate
2. washThe ethyl acetate layer was washed with water
3. dry with materialdried (MgSO4)
4. concentrationconcentrated under reduced pressure