反应详情

A mixture of ethyl (E)-4-[2-(2-pyrrolidinyl)ethenyl]benzoate (434 mg, 1.77 mmol), pentafluorophenyl 4-[N′-(2-methylphenyl)ureido]phenylacetate (797 mg, 1.77 mmol), Et3 N (0.37 mL, 2.66 mmol) in DMF (15 mL) was stirred for 15 hr. The mixture was diluted with EtOAc (300 mL). The solution was washed with brine (2×200 mL), dried over MgSO4, and evaporated off in vacuo. The residue was chromatographed on silica-gel with CHCl3-EtOAc (4:1) as eluent to give 906 mg (q.y.) ethyl (E)-4-[2-[1-[4-[N′-(2-methylphenyl)ureido]phenylacetyl]-2-pyrrolidinyl]ethenyl]benzoate as a brown oil. 1H-NMR (CDCl3) δ 1.39 (3 H, t, J=7.3 Hz), 1.83–2.20 (4 H, series of m), 2.24 (3 H, d, J=4.9 Hz), 3.63 (4 H, m), 4.36 (2 H, q, J=7.3 Hz), 4.62 and 4.84 (total 1 H, m), 6.18–6.47 (2 H, m), 7.03–8.02 (14 H, series of m).

1. washThe solution was washed with brine (2×200 mL)
2. dry with materialdried over MgSO4
3. customevaporated off in vacuo
4. customThe residue was chromatographed on silica-gel with CHCl3-EtOAc (4:1) as eluent