Water → Phytanyl Bromide
反応式
[Br-:1].[Mg+2].[Br-].S(O[CH2:9][CH2:10][CH:11]([CH2:13][CH2:14][CH2:15][CH:16]([CH2:18][CH2:19][CH2:20][CH:21]([CH2:23][CH2:24][CH2:25][CH:26]([CH3:28])[CH3:27])[CH3:22])[CH3:17])[CH3:12])(=O)(=O)C.O>CCOCC>[CH2:9]([Br:1])[CH2:10][CH:11]([CH2:13][CH2:14][CH2:15][CH:16]([CH2:18][CH2:19][CH2:20][CH:21]([CH2:23][CH2:24][CH2:25][CH:26]([CH3:28])[CH3:27])[CH3:22])[CH3:17])[CH3:12]参加物
5
実験手順
Magnesium bromide etherate (17 g, 55 mmol) and a stir bar were added to a 500 mL round bottom flask. The flask was sealed and flushed with nitrogen and anhydrous diethyl ether (200 mL) added via cannula. A solution of phytanyl mesylate (23) (10.9 g, 28.9 mmol (FW=377)) in anhydrous ether (50 mL) was also added via canulla, and the suspension stirred overnight. The following morning a precipitate had formed on the side of the flask. Chilled water (200 mL) was added (ppte dissolved) and the mixture transferred to a 1000-mL separating funnel. After shaking, the organic phase was separated. The aqueous phase was then extracted with ether (2×150 mL) and all ether phases combined. The ether phase was washed with water (2×150 mL), brine (150 mL) and dried over anhydrous Mg2SO4. The solution was filtered, concentrated, and purified by flash chromatography. Final yield 9.5 g (26.3 mmol, 91.1%).