反应详情

To a solution of ethyl 14-hydroxy-2-(1-methylethyl)-5,9,13-trimethyl-2,4,8,12-tetradecatetraenoate (713 mg, 2.03 mmol) in dry carbon tetrachloride (2 ml) was added triphenylphosphine (787 mg, 3.00 mmol), and the mixture was heated under reflux with stirring for 2 hours. After confirmation of disappearance of the starting material, the mixture was cooled to room temperature, and n-hexane was added thereto. Insoluble triphenylphosphine oxide was filtered and washed with n-hexane. The liltrate and the washing were combined and condensed. The resultant residue was added to a small amount of n-hexane, filtered, and washed to remove the residual triphenylphosphine oxide. The filtrate and the washing were combined and condensed to give as a residue the aimed ethyl 14-chloro-2-(1-methylethyl)-5,9,13-trimethyl-2,4,8,12-tetradecatetraenoate. The product was used in the subsequent reaction without purification.

1. temperaturethe mixture was heated
2. temperatureunder reflux
3. filtrationInsoluble triphenylphosphine oxide was filtered
4. washwashed with n-hexane
5. customcondensed
6. filtrationfiltered
7. washwashed
8. customto remove the residual triphenylphosphine oxide
9. customcondensed