Methyl arachidonate → Arachidonyl alcohol

Participants

Reaction Steps

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).

Provenance & Evidence