Water → 3-[4-[2-[(E)-2-phenylethenyl]-4-oxazolylmethylthio]phenyl]propionic acid

Beteiligte Stoffe

Reaktionsschritte

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.

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