反应详情

To a solution of (6Z,15Z)-11-((Z)-dec-4-enyl)henicosa-6,15-dien-10-ol 17 (0.5 g, 1.1 mmol), 4-(dimethylamino)butanoic acid hydrochloride (0.3 g, 1.7 mmol), EDCI hydrochloride (0.3 g, 1.7 mmol), DIPEA (0.4 g, 3.4 mmol) in anhydrous dichloromethane (10 mL) was added DMAP (5 mg). The solution was stirred at room temperature overnight under a nitrogen atmosphere. The mixture is concentrated in vacuo to dryness then taken up in DCM (150 mL) and extracted with saturated sodium bicarbonate. The reaction mixture was purified by column chromatography on silica gel 60 (1:1 ethyl acetate/hexanes) to afford (6Z,15Z)-11-((Z)-dec-4-enyl)henicosa-6,15-dien-10-yl 4-(dimethylamino)butanoate 22 as a colorless oil (0.4 g, 67%). 1H NMR (400 MHz, CDCl3) δ 5.40-5.28 (m, 6H), 4.97-4.90 (m, 1H), 2.36-2.25 (m, 4H), 2.25-2.19 (m, 6H), 2.07-1.95 (m, 12H), 1.85-1.73 (m, 2H), 1.58-1.45 (m, 3H), 1.45-1.10 (m, 24H), 0.93-0.85 (m, 9H). Rf 0.4 (10% MeOH—CH2Cl2).

1. concentrationThe mixture is concentrated in vacuo to dryness
2. extractionextracted with saturated sodium bicarbonate
3. customThe reaction mixture was purified by column chromatography on silica gel 60 (1:1 ethyl acetate/hexanes)