反应详情

A solution of methyl (3R,5S,E)-7-[4,5-bis(4-fluorophenyl)-2-(1-methylethyl)-1H-imidazol-1-yl]-3,5-dihydroxy-6-heptenoate (34.4 mg) in dry THF (2 ml) was treated with aqueous sodium hydroxide solution (0.1M 0.660 ml). After 5 minutes, the solution was concentrated and the aqueous residue was diluted with water (9 ml) and the solution washed with ethyl acetate (4×). The solution was briefly evaporated and then freeze-dried to give the title compound (29.2 mg) as a white fluffy solid, [α]20 +16.7° (c 0.4, H2O); δ(D2O) 1.20-1.55, 1.55-1.85 (m, 2H, CH(OH)CH2CH(OH)), 1.34 (d, J 7 Hz, 6H, CH(CH3)2), 2.26 (d, J 7 Hz, 2H, CH2CO2Na), 3.30 (septet, J 7 Hz, 1H, CH(CH3)2), 3.67 (m, 1H, =CHCH(OH)CH2CH(OH)), 4.35 (m, 1H, CH=CHCH(OH)), 5.61 (dd, J 14 and 7 Hz, 1H, NCH=CH), 6.75 (d, J 14 Hz, 1H, NCH=CH), 7.01 (t, J 9 Hz, 2H, C-3 and C-5 protons of 4-(4-fluorophenyl)), 7.1-7.4 (m, 6H, aromatics).

1. concentrationthe solution was concentrated
2. additionthe aqueous residue was diluted with water (9 ml)
3. washthe solution washed with ethyl acetate (4×)
4. customThe solution was briefly evaporated
5. customfreeze-dried