反应详情

To a stirred solution of the product of Example 300 (140 mg, 0.29 mmol) in THF (6 mL) was added a solution of LiOH.H2O (37 mg, 88 mmol) in H2O (1 mL) and the resulting solution stirred for 2 hours at ambient temperature. The reaction was concentrated in vacuo and 1 N HCl was added to the residue. The resulting precipitate was filtered and washed with H2O. Lyopholization gave the title compound (87 mg, 59%) as a white powder. 1H NMR (300 MHz, DMSO-d6, 90° C.) δ 9.12 (d, 1H, J=2.4 Hz), 8.74 (dd, 1H, J=4.9, 1.9 Hz), 8.31 (dt, 1H, J=7.9, 1.8 Hz), 7.84 (dd, 1H, J=7.9, 1.8 Hz), 7.63 (s, 1H), 7.61 (d, 1H, J=2.4 Hz), 7.54 (dd, 1H, J=7.9, 4.9 Hz), 7.45 (d, 1H, J=7.9 Hz), 7.23-7.21 (m, 2H), 7.19-7.15 (m, 2H), 4.30-4.26 (m, 1H), 2.28-2.22 (m, 1H), 2.20-2.14 (m, 1H), 2.11 (s, 3H), 1.98 (s, 3H), 1.88-1.81 (m, 1H), 1.75-1.68 (m, 1H), MS m/z 464 (M+1)+, 446. Anal calcd for C25H25N3O4S.HCl.0.5 H2O (509.01): C, 58.99; H, 5.35; N, 8.26. Found: C, 59.38; H, 5.49; N, 7.89.

1. concentrationThe reaction was concentrated in vacuo and 1 N HCl
2. additionwas added to the residue
3. filtrationThe resulting precipitate was filtered
4. washwashed with H2O