반응 #657795

반응 방정식

4-Bromo-N-butyl-2-fluorobenzamide

2-aminoisobutyric acid

K2CO3

2-Acetylcyclohexanone

citric acid

→

2-(4-(butylcarbamoyl)-3-fluorophenylamino)-2-methylpropanoic acid

수율 94.3%

용매

DMF

water

반응 조건

후처리

1. 1
   추출extracted with ethyl acetate (50 mL, 2 times)
2. 2
   건조The combined organic layer was dried over Na2SO4
3. 3
   농축concentrated

실험 절차

The title compound, made in accordance with General Method 3, may be used to prepare compound 4 in accordance with General Method 1. 4-Bromo-N-butyl-2-fluorobenzamide (950 mg, 3.22 mmol), 2-aminoisobutyric acid (450 mg, 4.36 mmol), CuI (100 mg, 0.5 mmol), TEA (0.1 mL) and K2CO3 (1.0 g, 7.2 mmol) were charged in DMF (8 mL) and water (2 mL) and stirred at RT for 5 min. 2-Acetylcyclohexanone (100 mg, 0.7 mmol) was added and the reaction mixture was heated at 100° C. for 18 h. The reaction mixture was acidified with 1 M citric acid (pH 4) and extracted with ethyl acetate (50 mL, 2 times). The combined organic layer was dried over Na2SO4 and concentrated to obtain 900 mg of 2-(4-(butylcarbamoyl)-3-fluorophenylamino)-2-methylpropanoic acid.

출처