1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride → methyl 4-[(2S,4S)-1-[4-[N'-(2-chlorophenyl)ureido]-3-methoxyphenylacetyl]-4-(2-naphthyloxy)-2-pyrrolidinyl]methoxybenzoate

Participants

Reaction Steps

A mixture of 4-[N′-(2-chlorophenyl)ureido]-3-methoxyphenylacetic acid (310 mg, 0.93 mmol), methyl 4-[(2S, 4S)-4-(2-naphthyloxy)-2-pyrrolidinyl]methoxybenzoate (350 mg, 0.93 mmol), EDC.HCl (267 mg, 1.40 mmol) and DMAP (171 mg, 1.40 mmol) in DMF (10 ml) was stirred at room temperature for 3 days. The mixture was poured into ice water and extracted with EtOAc. The combined extracts were washed with ice water and brine. After dried over Na2SO4, the extracts were concentrated in vacuo. The residue was chromatographed on silica gel [100 g, n-hexane/EtOAc(1/1)CHCl3/MeOH(50/1)], to give methyl 4-[(2S, 4S)-1-[4-[N′-(2-chlorophenyl) ureido]-3-methoxyphenylacetyl]-4-(2-naphthyloxy)-2-pyrrolidinyl]methoxybenzoate (450 mg, 68%) as a pale brown amorphous. 1H-NMR (CDCl3) δ 2.32 (m, 1H), 2.58 (d, J=14.5 Hz, 1H), 3.63 (d, J=2.7 Hz, 1H), 3.70 (s, 3H), 3.86 (s, 3H), 3.84–3.95 (m, 2H), 4.15–4.64 (m, 4H), 5.11 (br, 1H), 6.79–7.06 (m, 7H), 7.21–7.46 (m, 7H), 7.66–7.77 (m, 3H), 7.92 (d, J=8.8 Hz, 1H), 7.97 (m, 1H), 8.17 (d, J=8.4 Hz, 1H); MS (ESI) m/z 694 (M++1), 696 (M++3).

Provenance & Evidence