反应详情

A 100 mL round bottom flask charged with magnesium turnings (250 mg) and a stir bar was dried with a heat gun for 5 minutes then cooled under nitrogen. The flask was charged with dry THF (10 mL) and a small grain of iodine. A solution of linoleyl bromide (3 g, 9.1 mmol) in diethyl ether was added slowly and the mixture was stirred at room temperature. The Grignard did not initiate so the solution was concentrated to ˜5 mL then stirred for 2 minutes until the solution turned opaque and the iodine color disappeared. After 20 minutes, a colorless solid precipitated so the reaction was diluted with THF (15 mL) and stirred overnight. The next day 3-((9Z,12Z)-octadeca-9,12-dienyloxy)dihydrofuran-2(3H)-one (1.3 g, 3.6 mmol) was added and the solution was stirred for 3 hours. The reaction was diluted with ether (100 mL) and washed with 5% HCl (50 mL). The ether layer was dried on magnesium sulfate, filtered and concentrated in vacuo to dryness. The residue was purified by column chromatography on silica gel 60 (eluted with 10% ether in hexanes) to afford (14Z,17Z)-4-((9Z,12Z)-octadeca-9,12-dienyl)-3-((9Z,12Z)-octadeca-9,12-dienyloxy)tricosa-14,17-diene-1,4-diol as a colorless oil (1.75 g, 56%).

1. customwas dried with a heat gun for 5 minutes
2. temperaturethen cooled under nitrogen
3. additionThe flask was charged with dry THF (10 mL)
4. concentrationwas concentrated to ˜5 mL
5. stirringthen stirred for 2 minutes until the solution
6. customa colorless solid precipitated so the reaction
7. additionwas diluted with THF (15 mL)
8. stirringstirred overnight
9. stirringthe solution was stirred for 3 hours
10. washwashed with 5% HCl (50 mL)
11. dry with materialThe ether layer was dried on magnesium sulfate
12. filtrationfiltered
13. concentrationconcentrated in vacuo to dryness
14. customThe residue was purified by column chromatography on silica gel 60 (eluted with 10% ether in hexanes)