反应详情

3-(3-Biphenyl-4-yl-ureido)-N-(2-pyrrolidin-1-yl-ethyl)-3-tolyl-propionamide. To a solution of 3-(3-biphenyl-4-yl-ureido)-3-p-tolyl-propionic acid (0.15 g, 0.40 mmol), 2-pyrrolidin-1-yl-ethylamine (0.05 g, 0.40 mmol) and HOBt (0.081 g, 0.60 mmol) in DMF (4 mL), was added EDCl (0.12 g, 0.60 mmol). The resulting solution was stirred under N2 at rt for 20 h. The solution was diluted with H2O (20 mL) and extracted with EtOAc (3×30 mL). The combined extracts were washed with brine (40 mL), dried (Na2SO4), and filtered, and the solvent was removed. The crude product was purified by column chromatography on silica gel using a gradient of 0–20% (MeOH(1% NH4OH)/CH2Cl2) to afford 0.12 g (63%) of the desired product as a white solid. Racemic compound: Rf=0.11 (10% MeOH (1% NH4OH)/CH2Cl2). MS (electrospray): mass calculated for C29H34N4O2, 470.27; m/z found, 471.3 [M+H]+. 1H NMR (400 MHz, CD3OD): 7.57–7.50 (m, 4H), 7.43–7.37 (m, 4H), 7.29–7.25 (m, 3H), 7.16 (d, J=7.9 Hz, 2H), 5.22 (t, J=6.9 Hz, 1H), 3.28–3.23 (m, 2H), 2.68 (d, J=6.4 Hz, 2H), 2.52–2.48 (m, 6H), 2.31 (s, 3H), 1.77–1.75 (m, 4H).

1. extractionextracted with EtOAc (3×30 mL)
2. washThe combined extracts were washed with brine (40 mL)
3. dry with materialdried (Na2SO4)
4. filtrationfiltered
5. customthe solvent was removed
6. customThe crude product was purified by column chromatography on silica gel using a gradient of 0–20% (MeOH(1% NH4OH)/CH2Cl2)