Cyclohexanone → 1-(4-Bromophenyl)cyclohexanol

4-Bromo-1-iodobenzene (5 g, 17.7 mmol) in tetrahydrofuran (20 mL) at −40° C. was treated dropwise with isopropyl magnesium chloride (2 M solution in tetrahydrofuran, 23 mmol, 11.5 mL) and following addition was stirred 1 hour. Cyclohexanone (1.5 mL, 14.75 mmol) in tetrahydrofuran (5 mL) was added and the solution was allowed to slowly warm to room temperature over 3 hours. Saturated aqueous ammonium chloride solution was added and the mixture was then diluted with ethyl acetate. The aqueous and organic layers were separated and the organic layer was washed with water (1×) and brine (1×). The combined aqueous layers were extracted with ethyl acetate (3×10 mL), the combined organic layers were dried over magnesium sulfate, were filtered, and the solvent was removed in vacuo. The residue was purified by silica gel chromatography (20:1 hexanes-ethyl acetate) to afford 3 g (67% yield) of 1-(4-bromo-phenyl)-cyclohexanol. 13C NMR (100 MHz, CDCl3) □ 148.8, 131.4, 126.8, 120.8, 73.2, 38.9, 25.6, 22.3.

1. additionaddition
2. customThe aqueous and organic layers were separated
3. washthe organic layer was washed with water (1×) and brine (1×)
4. extractionThe combined aqueous layers were extracted with ethyl acetate (3×10 mL)
5. dry with materialthe combined organic layers were dried over magnesium sulfate
6. filtrationwere filtered
7. customthe solvent was removed in vacuo
8. customThe residue was purified by silica gel chromatography (20:1 hexanes-ethyl acetate)

ORD record

ord-9bffe55bfcab483c8a0f68d28662746a

Source dataset

uspto-grants-2009_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07479559B2