反应详情

Methyl 6-(2-(3-(4′-((4-methylpiperazin-1-yl)methyl)biphenyl-4-yl)propanoyl)oxazol-5-yl)pyridine-2-carboxylate (10 mg, 0.019 mmol) was dissolved in THF/H2O (3:2, 2 mL) and LiOH (1 mg, 0.06 mmol) was added. The reaction solution was stirred at room temperature under an atmosphere of Ar for 40 min before the addition of aqueous 1 N HCl to pH 4. The reaction solution was diluted with CH2Cl2 and the organic and aqueous layers were separated. The aqueous layer was made basic to pH 8 with the addition of saturated aqueous NaHCO3 and extracted with CH2Cl2. The organic phases were combined, dried over Na2SO4, and concentrated in vacuo. The crude product was purified by tritration in ether to provide 6-(2-(3-(4′-((4-methylpiperazin-1-yl)methyl)biphenyl-4-yl)propanoyl)oxazol-5-yl)pyridine-2-carboxylic acid as a white solid (2 mg, 21%): 1H NMR (CDCl3, 600 MHz) δ 8.17 (s, 1H), 7.93 (s, 3H), 7.48 (d, 2H, J=7.8 Hz), 7.44 (d, 2H, J=7.8 Hz), 7.31-7.27 (m, 4H), 3.68 (s, 2H), 3.47 (t, 2H, J=6.9 Hz), 3.15 (t, 2H, J=6.9 Hz), 2.82 (bs, 4H), 2.69 (s, 3H), 2.10-2.00 (m, 4H); HR ESI-TOF m/z 511.2334 (M+H+, C30H30N4O4, requires 511.2340).

1. customthe organic and aqueous layers were separated
2. additionThe aqueous layer was made basic to pH 8 with the addition of saturated aqueous NaHCO3
3. extractionextracted with CH2Cl2
4. dry with materialdried over Na2SO4
5. concentrationconcentrated in vacuo
6. customThe crude product was purified by tritration in ether