1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride → methyl 2-[1-[4-[N'-(2-chlorophenyl)ureido]-3-methoxyphenyl acetyl]-2-pyrrolidinylmethoxy]pyridine-5-carboxylate

Participants

Reaction Steps

To a stirred mixture of methyl 2-(2-pyrrolidinyl)methoxypyridine-5-carboxylate (370 mg, 1.57 mmol), 4-[N′-(2-chlorophenyl)ureido]-3-methoxyphenylacetic acid (525 mg, 1.57 mmol), 4-DMAP (230 mg, 1.88 mmol) in DMF (10 ml) was added EDC.HCl (360 mg, 1.88 mmol) at room temperature. The resulting mixture was stirred at room temperature for 20 hr. The mixture was pored into ice-water. The solid was collected, washed with water and air-dried. The crude solid was purified by silica-gel (30 ml) column chromatography with CHCl3-EtOH (98:2, v/v) as eluent and crystallized with Et2O to give methyl 2-[1-[4-[N′-(2-chlorophenyl)ureido]-3-methoxyphenyl acetyl]-2-pyrrolidinylmethoxy]pyridine-5-carboxylate (600 mg, 69%) as an amorphous solid. 1H-NMR (CDCl3) δ 0.21 and 2.01 (each m, 4 H), 3.45–4.50 (series of s and m, 13 H which contains amide-isomers), 6.58–8.83 (series of s and m, 12 H which contains amide-isomers)

Provenance & Evidence