反应详情

To a stirring solution of 26B (22 mg, 0.09 mmol) in THF (1 mL) at ambient temperature was added LiOH monohydrate (11 mg, 0.26 mmol) as a slurry in H2O (0.500 mL). The reaction was left to stir for 14 h, acidified to pH 4 via 1N HCl(aq), and then extracted with EtOAc (3×10 mL). The organic layers were combined, dried over MgSO4, filtered, and concentrated under reduced pressure to give 16 mg 26C (79% yield). m/z (ES+) M+1=232.0; HPLC tR=1.86 min. 1H NMR (500 MHz, MeOH-d4) δ 8.56 (d, J=2.1 Hz, 1H), 7.78-7.65 (m, 2H), 2.62-2.47 (m, 1H), 1.97 (ddd, J=9.0, 4.7, 4.6 Hz, 1H), 1.63 (ddd, J=9.4, 5.0, 4.8 Hz, 1H), 1.49-1.39 (m, 1H).

1. waitThe reaction was left
2. extractionextracted with EtOAc (3×10 mL)
3. dry with materialdried over MgSO4
4. filtrationfiltered
5. concentrationconcentrated under reduced pressure