反应详情

Ethyl{(1S)-5-[2-(4-methyl-2-phenyl-1,3-oxazol-5-yl)ethoxy]-2,3-dihydro-1H-inden-1-yl}acetate (0.135 g, 0.33 mmol) was dissolved in EtOH (6 mL) and LiOH (0.024 g, 1.0 mmol) was added. Water (3 mL) was added and THF was added until the cloudy solution became clear. The resulting mixture was stirred overnight at rt. HCl (2 N) was added to adjust the pH to 2, then extracted three times with ethyl acetate. The organic layers were combined, dried, and concentrated to give {(1S)-5-[2-(4-methyl-2-phenyl-1,3-oxazol-5-yl)ethoxy]-2,3-dihydro-1H-inden-1-yl}acetic acid (0.039 g, 30.6% yield) as colorless oil. ES-MS m/z 378.2 ((MH)+); HPLC RT (min.) 3.22; 1H NMR (Acetone-d6) δ 8.1 (s br 1H) 8.0-7.95 (m, 2H), 7.52-7.43 (m, 3H), 7.15 (d, 1H), 6.81 (s, 1H), 6.73 (d, 1H), 4.27 (t, 2H) 3.47-3.40 (m, 1H), 3.18 (t, 2H), 2.90-2.68 (m, 3H), 2.41-2.29 (m, 2H), 2.18 (s, 3H), 1.77-1.68 (m, 1H).

1. extractionextracted three times with ethyl acetate
2. customdried
3. concentrationconcentrated