反应详情

温度

50 °C

684 mg (17.1 mmol, 10 eq) of sodium hydroxide are added to a solution of 750 mg (1.71 mmol, 1 eq) of ethyl 3-[3′-(3-octyl-1-methylureido)biphenyl-4-yl]propanoate in 15 mL of ethanol. The reaction mixture is heated at 50° C. for 6 hours. The reaction medium is evaporated to dryness, taken up in water, acidified with 1N hydrochloric acid solution and extracted with ethyl acetate. The organic phases are combined, washed with water and dried over sodium sulfate. The solvent is evaporated off and the orange oil obtained is chromatographed on silica gel (30 g FlashSmart Pack column) eluted with 30/70 heptane/ethyl acetate and then crystallized from ethyl ether, filtered and dried. 500 mg of 3-[3′-(3-octyl-1-methylureido)biphenyl-4-yl]propanoic acid are obtained in the form of a white powder (m.p.=86-88° C.). Yield=71%

1. customThe reaction medium is evaporated to dryness
2. extractionextracted with ethyl acetate
3. washwashed with water
4. dry with materialdried over sodium sulfate
5. customThe solvent is evaporated off
6. customthe orange oil obtained
7. customis chromatographed on silica gel (30 g FlashSmart Pack column)
8. washeluted with 30/70 heptane/ethyl acetate
9. customcrystallized from ethyl ether
10. filtrationfiltered
11. customdried