反应详情

A mixture of pentafluorophenyl 3-methoxy-4-[N′-(2-methylphenyl)ureido]phenylacetate (591 mg, 1.23 mmol), methyl (S)-3-nitro-4-(2-amino-1-propoxy)benzoate (313 mg, 1.23 mmol), and Et3N (257 mL, 1.84 mmol) in DMF (5 mL) was stirred at room temp for 2 days. The mixture was diluted with EtOAc, washed with 0.5 N HCl, brine, dried over Na2SO4, and evaporated. The residue was purified by column chromatography on silica-gel with 5% MeOH in CHCl3 as eluent to give 310 mg (46%) methyl (S)-3-nitro-4-[2-[3-methoxy-4-[N′-(2-methylphenyl)ureido]phenylacetylamino]-1-propoxy]benzoate as a gum. 1H-NMR (CDCl3) δ1.28 (d, 3H, J=6.8 Hz), 2.31 (s, 3 H), 3.49 (s, 2 H, 3.71 (s, 3 H), 3.92 (s, 3 H), 4.14-4.16 (m, 2 H), 4.38-4.41 (m, 1 H), 5.88-5.90 (m, 1 H), 6.49 (s, 1 H), 6.70-6.71 (m, 1 H), 6.77-6.79 (m, 1 H), 7.05-7.30 (m, 4 H), 7.55-7.57 (m, 1 H), 8.02-8.06 (m, 2 H), 8.16-8.19 (m, 1 H), 8.51-8.52 (m, 1 H); MS (FAB) m/z 551 (M++1).

1. washwashed with 0.5 N HCl, brine
2. dry with materialdried over Na2SO4
3. customevaporated
4. customThe residue was purified by column chromatography on silica-gel with 5% MeOH in CHCl3 as eluent