Hydrochloric Acid → HCID 23512371, compound

Participants

Reaction Steps

To a stirred solution of pentafluorophenyl ester of 3-methoxy-4-[N′-(2-methylphenyl)ureido]phenylacetic acid (1.86 g, 3.87 mmol) and methyl 3-nitro-4-(2-aminoethoxy)benzoic acid (0.93 g, 3.87 mmol) in DMF (27 mL) was added Et3N (0.90 mL, 6.46 mmol), and the resulting mixture was stirred overnight. The mixture was poured into 0.5 N HCl and the resulting solid was collected. The crude solid was dissolved in THF-0.25 N NaOH (1/1, 20 mL) and the resulting mixture was heated under reflux overnight. The mixture was extracted with EtOAc, washed with brine, dried over Na2SO4, and evaporated. The crude solid was recrystallized from CHCl3—EtOH to give 60 mg (3% for 2 steps) 3-nitro-4-[2-[3-methoxy-4-[N′-(2-methylphenyl)ureido]phenylacetyl]aminoethoxy]benzoic acid 257 as a yellow crystalline solid. mp 112-115° C.; 1H-NMR (DMSO-d6) d 2.24 (s, 3 H), 3.37-3.66 (m, 7 H), 3.84 (s, 3 H), 4.27-4.30 (m, 1 H), 6.74-8.56 (series of m, total 12 H); MS (FAB) m/z 523 (M++1); Anal. Calcd. for C26H26N4O8.3/2H2O: C, 56.83; H, 5.32; N, 10.20. Found: C, 56.66; H, 4.90; N, 9.33.

Provenance & Evidence