Triethyl phosphonoacetate → HCID 86672773, Verbindung

Temperatur

0 °C

1,8-Diazabicyclo[5.4.0]undec-7-ene (436 μL, 2.92 mmol) was added to a solution of (diethoxy-phosphoryl)-acetic acid ethyl ester (633 μL, 2.43 mmol) and lithium chloride (144 mg, 3.41 mmol) in acetonitrile (20.0 mL) at 0° C., and the mixture was stirred at 0° C. for 10 minutes. A solution of 8,8,8-trifluoro-octanal (2.43 mmol) in acetonitrile (4.3 mL) was added dropwise to the reaction solution at 0° C., and the mixture was stirred for 10 minutes. Thereafter, the reaction mixture was stirred at room temperature for one hour and diluted with methyl tert-butyl ether (200 mL). The organic layer was sequentially washed with a saturated aqueous ammonium chloride solution (30 mL), H2O (30 mL) and saturated brine (30 mL), dried over sodium sulfate and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (hexane-ethyl acetate) to give (E)-10,10,10-trifluoro-dec-2-enoic acid ethyl ester as a colorless oily substance (426.6 mg, 70%).

1. stirringthe mixture was stirred for 10 minutes
2. stirringThereafter, the reaction mixture was stirred at room temperature for one hour
3. washThe organic layer was sequentially washed with a saturated aqueous ammonium chloride solution (30 mL), H2O (30 mL) and saturated brine (30 mL)
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated under reduced pressure
6. customThe resulting residue was purified by silica gel column chromatography (hexane-ethyl acetate)

ORD-Eintrag

ord-fd3788fed58743c587637d23b01399c9

Quelldatensatz

uspto-grants-2015_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09169254B2