反应详情

3-[4-(tert-Butyl-dimethyl-silanyloxymethyl)-phenyl]-2-[2-(4-fluoro-phenyl)-ethylsulfanyl]-propionic acid methyl ester (4.93 g, 10.66 mmol) was dissolved in THF (100 mL) and water (50 mL) and cooled down to 0° C. NaOH (6.39 g, 159.88 mmol) was added and the resulting suspension was stirred stirring for 1 h without removing the cooling bath and another 28 h at ambient temperature. 2N HCl was added until pH 2 was reached and the mixture was extracted with EtOAc (3×100 mL). The combined organic layers were dried (MgSO4) and evaporated under reduced pressure to afford the crude product which was directly proceeded to the next step (4.79 g, 95.3%). 1H NMR (400 MHz, CDCl3): δ 7.16 (d, 2H), 7.06 (d, 2H), 6.99 (m, 2H), 6.85 (t, 2H), 4.62 (s, 2H), 3.38 (t, 1H), 3.09 (dd, 1H), 2.71-2.82 (m, 5H), 0.844 (s, 9H), 0.00 (s, 6H). Mass Spectrum: M−H+ 447.10.

1. stirringstirring for 1 h
2. customwithout removing the cooling bath
3. customanother 28 h
4. customat ambient temperature
5. addition2N HCl was added until pH 2
6. extractionthe mixture was extracted with EtOAc (3×100 mL)
7. dry with materialThe combined organic layers were dried (MgSO4)
8. customevaporated under reduced pressure