Benzyl Bromide → 1-[2-(Benzyloxy)ethyl]-4-iodobenzene

Into a 50-mL 3-necked round-bottom flask under N2 was placed a solution of 2-(4-iodophenyl)ethanol (470 mg, 1.90 mmol) in tetrahydrofuran (10 mL). Sodium hydride (91 mg, 3.8 mmol, 1.2 equiv.) was added at 0° C. The mixture was warmed to room temperature and stirred at room temperature for 2 h. Benzyl bromide (272 μL, 3.9 mmol, 1.2 equiv.) and tetra-n-butylammonium bromide (61 mg, 0.19 mmol, 0.10 equiv.) were added at room temperature. The resulting solution was stirred for 20 h at room temperature. The reaction was then quenched by the addition of 10 mL of aqueous NH4CI. The solution was extracted with 3×60 mL of EtOAc, and the organic layers were combined and washed with 50 mL of brine. After evaporation, the residue was applied onto a silica gel column, and the product was eluted with EtOAc/petroleum ether 1:20 to furnish 600 mg (94%) of 1-[2-(benzyloxy)ethyl]-4-iodobenzene as a white solid.

1. customInto a 50-mL 3-necked round-bottom flask under N2 was placed
2. stirringThe resulting solution was stirred for 20 h at room temperature
3. customThe reaction was then quenched by the addition of 10 mL of aqueous NH4CI
4. extractionThe solution was extracted with 3×60 mL of EtOAc
5. washwashed with 50 mL of brine
6. customAfter evaporation
7. washthe product was eluted with EtOAc/petroleum ether 1:20

ORDレコード

ord-a4bf37a67c9e4afd8179621452339d91

出典データセット

uspto-grants-2013_05

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08445684B2