反应详情

A solution of 1,1-dimethyleth-1-yl (3R,5S,E)-7-[4,5-bis(4-fluorophenyl)-2-(1-methylethyl)-1H-imidazol-1-yl]-3,5-dihydroxy-6-heptenoate (51 mg) in ethanol (5 ml) was treated with aqueous sodium hydroxide solution (0.1M, 1 ml) and the clear solution was stirred at room temperature. After 18 h the solution was concentrated to ca 1 ml and then diluted with water (20 ml) and the solution washed with ether (2×7 ml). The solution was briefly evaporated and then freeze dried to give the title compound (52 mg), as a white fluffy solid, [α]D20 +19.5° (c 0.41, H2O); δ(D2O) 1.20-1.55, 1.55-1.82 (m, 2H, CH(OH)CH2CH(OH)), 1.34 (d, J 7 Hz, 6H, CH(CH3)2), 2.26 (d, J 7 Hz, 2H, CH2CO2Na), 3.28 (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-fluorophenyl), 6.91-7.41 (m, 6H, aromatics).

1. concentrationAfter 18 h the solution was concentrated to ca 1 ml
2. additiondiluted with water (20 ml)
3. washthe solution washed with ether (2×7 ml)
4. customThe solution was briefly evaporated
5. customfreeze dried