Water → Diethyl 2-(4,4,5,5,5-pentafluoropentyl)malonate
Reaction equation
[H-].[Na+].[C:3]([O:11][CH2:12][CH3:13])(=[O:10])[CH2:4][C:5]([O:7][CH2:8][CH3:9])=[O:6].I[CH2:15][CH2:16][CH2:17][C:18]([F:24])([F:23])[C:19]([F:22])([F:21])[F:20].O>O1CCCC1>[F:23][C:18]([F:24])([C:19]([F:22])([F:21])[F:20])[CH2:17][CH2:16][CH2:15][CH:4]([C:5]([O:7][CH2:8][CH3:9])=[O:6])[C:3]([O:11][CH2:12][CH3:13])=[O:10]Participants
Conditions
- Temperature
- 0 °C
Procedure
Sodium hydride (60%, 2.87 g, 71.87 mmol) was added to anhydrous tetrahydrofuran (250 ml) and cooled to 0° C. To this mixture, diethyl malonate (12.12 ml, 79.86 mmol) was slowly added dropwise, followed by stirring for 1 hour at room temperature. 1-Iodo-4,4,5,5,5-pentafluoropentane (11.5 g, 39.93 mmol) dissolved in anhydrous tetrahydrofuran (50 ml) was then slowly added dropwise to the reaction mixture, followed by stirring for 12 hours at room temperature. Water was added to the reaction mixture, which was then extracted twice with ethyl acetate. The combined organic layers were washed with water and saturated aqueous sodium chloride, and then dried over anhydrous magnesium sulfate. After distilling off the solvent, the residue was purified by silica gel column chromatography (eluent: ethyl acetate/hexane=1/40) to give diethyl 2-(4,4,5,5,5-pentafluoropentyl)malonate (11.2 g, Yield 88%).
Workup
- additionwas then slowly added dropwise to the reaction mixture
- stirringby stirring for 12 hours at room temperature
- extractionwas then extracted twice with ethyl acetate
- washThe combined organic layers were washed with water and saturated aqueous sodium chloride
- dry with materialdried over anhydrous magnesium sulfate
- distillationAfter distilling off the solvent
- customthe residue was purified by silica gel column chromatography (eluent: ethyl acetate/hexane=1/40)
Sources & evidence
- ORD record
- ord-b005966e182e437f849ab359ff6e044c
- Source dataset
- uspto-grants-2003_04
- Patent number
- US06552068B1
Reaction notes
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