Cyclobutanone → HCID 86698600, Verbindung

Temperatur

-40 °C

To 1-bromo-2-fluoro-4-iodobenzene (2390 mg, 7.90 mmol) in tetrahydrofuran (20 mL) at −40° C. was added isopropyl magnesium chloride.lithium chloride (1.3M in THF, 6.4 mL, 5.1 mmol) dropwise. The reaction mixture was stirred at −40° C. for 10 minutes, and treated with additional isopropyl magnesium chloride.lithium chloride (1.3M in THF, 1 mL, 1.3 mmol). The reaction mixture was stirred at −40° C. for an additional 20 minutes and then treated with cyclobutanone (624 mg, 8.72 mmol) dropwise at −40° C. The reaction mixture was warmed to room temperature, and stirred at room temperature for 16 hours. The reaction mixture was quenched with water and extracted with ethyl acetate (3×240 mL). The combined organic layers were dried over sodium sulfate, filtered and concentrated in vacuo to afford the title compound (1.7 g, 91%) as an oil.

1. stirringThe reaction mixture was stirred at −40° C. for an additional 20 minutes
2. temperatureThe reaction mixture was warmed to room temperature
3. stirringstirred at room temperature for 16 hours
4. customThe reaction mixture was quenched with water
5. extractionextracted with ethyl acetate (3×240 mL)
6. dry with materialThe combined organic layers were dried over sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated in vacuo

ORD-Eintrag

ord-1c1a93f7db1241e9a7e46fefedb231b0

Quelldatensatz

uspto-grants-2014_11

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08889730B2