반응 #42572

반응 방정식

methyl 3-[(dipropylamino)carbonyl]-5-(1,3-oxazol-2-yl)benzoate

→

3-[(dipropylamino)carbonyl]-5-(1,3-oxazol-2-yl)benzoic acid

수율 88.2%

용매

methanol

potassium hydroxide

water

반응 조건

후처리

1. 1
   기타The solvent was removed under reduced pressure
2. 2
   workup.DISSOLUTIONthe residue was dissolved in water
3. 3
   추출extracted with ethyl acetate
4. 4
   추출extracted with chloroform (3×100 mL)
5. 5
   농축the combined organic layers were concentrated under reduced pressure

실험 절차

A solution of methyl 3-[(dipropylamino)carbonyl]-5-(1,3-oxazol-2-yl)benzoate (315 mg, 0.95 mmol) in methanol (3 mL) and potassium hydroxide (3 mL of a 1.0 M solution in water, 3 mmol) was stirred at room temperature for 30 min. The solvent was removed under reduced pressure, the residue was dissolved in water, and extracted with ethyl acetate. The aqueous layer was acidified to pH 3 with 1 M hydrochloric acid, extracted with chloroform (3×100 mL), and the combined organic layers were concentrated under reduced pressure to afford 3-[(dipropylamino)carbonyl]-5-(1,3-oxazol-2-yl)benzoic acid (265 mg): 1H NMR (300 MHz, CD3OD) δ 8.71 (s, 1H), 8.08 (s, 2H), 8.05 (s, 1H), 7.34 (s, 1H), 3.52 (t, J=8 Hz, 2H), 3.26 (t, J=8 Hz, 2H), 1.75 (q, J=8 Hz, 2H), 1.59 (q, J=8 Hz, 2H), 1.02 (t, J=8 Hz, 3H), 0.74 (t, J=8 Hz, 3H).

출처