反应详情

A mixture of 3-methoxy-4-[N′-(2-methylphenyl)ureido]phenylacetic acid (1.45 g, 4.6 mmol), 2-(2-(4-ethoxycarbonylphenyl)ethynyl)pyrrolidine (1.12 g, 4.6 mmol), EDC 1.32 g (6.9 mmol), DMAP (562 mg, 4.6 mmol) in DMF (20 mL) was stirred overnight. The mixture was poured into 1 N HCl and the solid was collected with suction. The solid was dissolved in CHCl3 and died over MgSO4. After removal of the solvent, the residue was chromatographed on silica-gel with CHCl3—MeOH (100:1, v/v) as eluent to give 2.20 g (89%) ethyl 4-[2-[1-[3-methoxy-4-(N′-(2-methylphenyl)ureido]phenylacetyl]-2-pyrrolidinyl]ethynyl]benzoate as a white amorphous solid. 1H-NMR (CDCl3) δ1.37-1.41 (3 H, m), 1.94-2.22 (4 H, m), 2.29 (3 H, s), 3.41-3.89 (2 H, m), 3.62 (3 H, s), 3.69 (2 H, s), 4.34-4.40 (2 H, m), 4.72-5.01 (1 H, m), 6.33 (1 H, br s), 6.80-8.06 (12 H, m).

1. customthe solid was collected with suction
2. dissolutionThe solid was dissolved in CHCl3
3. customAfter removal of the solvent
4. customthe residue was chromatographed on silica-gel with CHCl3—MeOH (100:1