反应详情

To a solution of 3-(4-mercaptophenyl)propionic acid (2.0 g) and triethylamine (2.23 g) in N,N-dimethylformamide (50 ml) was added dropwise a solution of 4-chloromethyl-2-[(E)-2-phenyl ethenyl]oxazole (2.20 g) in N,N-dimethylformamide (10 ml) at 0° C. and then stirred for 2.5 hours. To the reaction mixture was added water, and extracted with diethyl ether. The water layer was made acidic with concentrated hydrochloric acid, and extracted with ethyl acetate. The ethyl acetate layer was washed with water, dried (MgSO4), and concentrated under reduced pressure to give crystals of 3-[4-[2-[(E)-2-phenyl ethenyl]-4-oxazolylmethylthio]phenyl]propionic acid (3.05 g, 84%). Recrystallization from ethyl acetate-hexane gave colorless prisms, mp 120-121° C.

1. extractionextracted with diethyl ether
2. extractionextracted with ethyl acetate
3. washThe ethyl acetate layer was washed with water
4. dry with materialdried (MgSO4)
5. concentrationconcentrated under reduced pressure