反应详情

To a magnetically stirred solution of 0.5 ml (0.5 mmol) of LiAlH4 in Et2O, 100 mg (0.314 mmol) of arachidonic acid methyl ester in 2 mL of Et2O was added dropwise at 0° C. The reaction mixture was stirred for 1 h and then quenched by addition of 1 mL of EtOAC. 2 mL of saturated NH4Cl solution was added and the organic layer was separated, dried with MgSO4, filtered and evaporated. Chromatography on silica gel (eluents: CH2Cl2/petroleum ether up to 70% CH2Cl2), evaporation, followed by Millipore filtration of a CH2Cl2 solution of the product gave 99.3 mg (0.292 mmol, 93% yield) of arachidonyl alcohol as a colorless oil: TLC (CHCl3) Rf 0.28; 1H NMR (200 MHz, CDCl3) δ 5.37 (m, 8 H ), 3.61 (t, 2 H, J=6 Hz), 2.79 (m, 6H), 2.08 (m, 4 H), 1.66-1.17 (m, 8 H), 0.92 (t, 3 H, J=7 Hz).

1. customquenched by addition of 1 mL of EtOAC
2. addition2 mL of saturated NH4Cl solution was added
3. customthe organic layer was separated
4. dry with materialdried with MgSO4
5. filtrationfiltered
6. customevaporated
7. customChromatography on silica gel (eluents: CH2Cl2/petroleum ether up to 70% CH2Cl2), evaporation
8. filtrationfollowed by Millipore filtration of a CH2Cl2 solution of the product