反应详情

Ethyl 14-chloro-2-(1-methylethyl)-5,9,13-trimethyl-2,4,8,12-tetradecatetraenoate (670 mg, 1.81 mmol) was dissolved in dry toluene (20 ml) under argon atmosphere. To the solution cooled on an ethanol-dry ice bath was added with stirring 1M diisopropyl aluminium hydride in toluene (4 ml). After 30 minutes, disappearance of the starting material was confirmed. Water (1.5 ml) was added to the reaction mixture, the cooling bath was removed, and the stirring was continued. After further stirring with addition of MgSO4 as a drying agent, the mixture was filtered and condensed. The resulting residue was subjected to silica gel column chromatography (solvent: n-hexane/ethyl acetate (12:1)), and relevant fractions gave 14-chloro-2-(1-methylethyl)-5,9,13-trimethyl-2,4,8,12-tetradecatetraen-1-ol (492 mg, 79%).

1. temperatureTo the solution cooled on an ethanol-dry ice bath
2. additionwas added
3. customthe cooling bath was removed
4. filtrationthe mixture was filtered
5. customcondensed