Boron trifluoride etherate → HCID 17789168, compound

Participants

Reaction Steps

Ethyl 4-hydroxybenzoate (1.0 g, 6.02 mmol) and cyclohexene (6.0 mL) were mixed together and boron trifluoride diethyl etherate (0.38 mL, 3.01 mmol) was then added. The mixture was heated under reflux for 2 h and then cooled to rt. EtOAc (20 mL) was added and the solution washed with 5% NaOH solution (3×40 mL) and with H2O (50 mL). The organic layer was dried over Na2SO4 and the solvent was evaporated. The crude product was absorbed over silica gel and purified by column chromatography using a Teledyne ISCO apparatus, eluting with Cy:EtOAc (from 100:0 to 90:10) to afford the title compound (1.17 g, 78%), as white solid. MS (ESI) m/z: 249 [M−H]+; 1H NMR (DMSO-d6): δ 1.29 (t, J=7.1 Hz, 3H), 1.33-1.49 (m, 5H), 1.50-1.59 (m, 1H), 1.63-1.79 (m, 2H), 1.89-1.98 (m, 2H), 4.26 (q, J=7.1 Hz, 2H), 4.41-4.49 (m, 1H), 7.02 (d, J=8.8 Hz, 2H), 7.87 (d, J=8.8 Hz, 2H).

Provenance & Evidence