Bromoacetic Acid → 4-(2-Furyl)-3-oxaoctanoic acid

Temperatur

0 °C

NaH (16.3 g, 680.9 mmol) and freshly distilled THF (170 mL) were stirred at room temperature as (S)-1-(2-furyl)-1-pentanol ([α]25D -17.2°, 30.0 g, 46.0 mmol) in THF (170 mL) was added dropwise. After the addition was complete, the mixture was stirred for 15 m before cautiously heating to reflux for 1 h. The mixture was cooled to 0° C. before adding dropwise a solution of bromoacetic acid (27.3 g, 196.5 mmol) in THF (40 mL). The mixture was refluxed 2 days before cooling and carefully pouring into 600 mL ice water. The aqueous was washed with ether and acidified with HCl to pH 4, and extracted with ether. The combined organic extracts were washed with brine, dried over MgSO4, and evaporated to give a quantitative yield of crude product which was used in the next step without further purification.

1. additionwas added dropwise
2. additionAfter the addition
3. temperaturebefore cautiously heating
4. temperatureto reflux for 1 h
5. temperatureThe mixture was refluxed 2 days
6. temperaturebefore cooling
7. washThe aqueous was washed with ether
8. extractionextracted with ether
9. washThe combined organic extracts were washed with brine
10. dry with materialdried over MgSO4
11. customevaporated

ORD-Eintrag

ord-09a34f56bee543a6ba1ae309abfdb22d

Quelldatensatz

uspto-grants-1995_02

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US05389647