Hydrochloric Acid → 1-[(S)-1-Benzyl-2-(2-pyrrolidin-1-yl-ethylamino)-ethyl]-3-(4-phenoxy-phenyl)-urea

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반응 단계

(S)-2-[3-(4-Phenoxy-phenyl)-ureido]-3-phenyl-N-(2-pyrrolidin-1-yl-ethyl)-propionamide. To a solution of [(S)-2-phenyl-1-(2-pyrrolidin-1-yl-ethylcarbamoyl)-ethyl]-carbamic acid tert-butyl ester (Example 9, step A) (0.1 g, 0.28 mmol) in CH2Cl2 (3 mL), a 4 M solution of HCl in dioxane (2.5 mL, 10 mmol) was added, and the mixture was stirred for 4 h at rt. The solvents were removed, and the residue was treated with CH2Cl2. The solvents were removed again under reduced pressure. The residue was dissolved in CH2Cl2 (3 mL), and TEA (0.07 g, 0.69 mmol) was added at 0° C. followed by 4-phenoxyphenylisocyanate (0.07 g, 0.33 mmol). The mixture was warmed to rt over a period of 4 h and then diluted with EtOAc (75 mL). The organic layer was washed with saturated NaHCO3 (25 mL) and brine (25 mL), and dried (Na2SO4). The solvent was removed, and the residue was purified by flash column chromatography using 0–20% MeOH (1% NH4OH)/CH2Cl2 to afford 0.03 g (25%) of the desired product. MS (electrospray): mass calculated for C28H32N4O3, 472.25; m/z found, 473.2 [M+H]+, 495.2 [M+Na]+. 1H NMR (400 MHz, DMSO-d6): 8.68 (s, 1H), 8.04 (t, J=5.5 Hz, 1H), 7.36–6.89 (m, 14H), 6.30 (d, J=8.3 Hz, 1H), 4.46 (m, 1H), 3.15 (m, 2H), 2.96 (dd, J=13.6, 5.6 Hz, 1H), 2.82 (dd, J=13.6, 7.7 Hz, 1H), 2.42–2.37 (m, 6H), 1.67–1.63 (m, 4H).

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