Iodine → HCID 67060813, compound

Temperature

0 °C

A solution of n-BuLi (24.7 mL, 1.6 M in hexanes, 39.5 mmol, 1.4 equivalents) was added dropwise to a solution of 2-hexylfuran (4.3 g, 28.3 mmol) in dry tetrahydrofuran (THF, 50 mL) at −78° C. under N2. The reaction mixture was warmed to 0° C., stirred for 10 min and cooled again to −78° C. To this solution was added slowly iodine (9.3 g, 36.7 mmol) in 25 mL of THF, and the solution was warmed slowly to 0° C. and stirred for 2 h at 0° C. After addition of 100 mL of water, the solution was extracted with hexane. The organic layer was washed with aqueous Na2S2O3 solution (30 mL) and water, dried over MgSO4, filtered, and concentrated. The crude product was purified by silica gel column chromatography (elution with hexane) to afford 6 g of 2-hexyl-5-iodofuran (76%) as a pale brownish oil. 1H NMR (300 MHz, CDCl3): δ6.37 (d, J=3.14 Hz, 1H), 5.88 (d, J=3.16 Hz, 1H), 2.60 (t, J=7.56, 7.56 Hz, 2H), 1.58 (td, J=15.11, 7.66, 7.66 Hz, 2H), 1.24-1.39 (m, 6H), 0.86 (t, J=6.77, 6.77 Hz, 3H) ppm. 13C NMR (75 MHz, CDCl3): δ 162.3, 120.6, 108.0, 84.3, 31.6, 28.8, 28.3, 27.8, 22.6, 14.1 ppm. HRMS (FD): m/z calcd for C10H15IO: 278.0168. found 278.0172.

1. temperaturecooled again to −78° C
2. temperaturethe solution was warmed slowly to 0° C.
3. stirringstirred for 2 h at 0° C
4. extractionthe solution was extracted with hexane
5. washThe organic layer was washed with aqueous Na2S2O3 solution (30 mL) and water
6. dry with materialdried over MgSO4
7. filtrationfiltered
8. concentrationconcentrated
9. customThe crude product was purified by silica gel column chromatography (elution with hexane)

ORD record

ord-61590d455dc4467ab664dfc4ae7558ad

Source dataset

uspto-grants-2014_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08759550B2