反应详情

A 100 mL round bottom flask was charged with magnesium turnings (0.6 g, 25.7 mmol) and a stir bar. The flask was dried with a heat gun for 5 minutes. The flask was charged with THF (5 mL) and a single grain on iodine. A solution of (Z)-1-bromonon-3-ene (4.5 g, 22.0 mmol) in THF (5 mL) was added slowly to the mixture and reaction was refluxed for 30 minutes under nitrogen. The solution was cooled to room temperature and a solution of (Z)-2-((Z)-dec-4-enyl)dodec-6-enal 7 (4.7 g, 14.7 mmol) in THF (5 mL) was added. The solution was stirred overnight at room temperature and upon completion the mixture was poured into 5% HCl (50 mL) and ice (100 mL). The solution was extracted with ether (2×150 mL) and the combined ether extracts were dried on magnesium sulfate, filtered and concentrated in vacuo to dryness. The residue was purified by column chromatography (column: 2″ W×8″ L; eluted with 100% Hexanes to 5% ethyl acetate in hexanes) to afford (6Z,15Z)-11-((Z)-dec-4-enyl)henicosa-6,15-dien-10-ol 17 as a colorless oil (5.4 g, 82%). Rf 0.5 (10% EtOAc-Hexanes).

1. customThe flask was dried with a heat gun for 5 minutes
2. additionThe flask was charged with THF (5 mL)
3. temperaturewas refluxed for 30 minutes under nitrogen
4. extractionThe solution was extracted with ether (2×150 mL)
5. dry with materialthe combined ether extracts were dried on magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated in vacuo to dryness
8. customThe residue was purified by column chromatography (column
9. washeluted with 100% Hexanes to 5% ethyl acetate in hexanes)