4-Fluorothiophenol → HCID 21099426, compound

Participants

Reaction Steps

Butyllithium (1.6M in hexanes, 0.35 mL, 0.57 mmol) was added dropwise to a cooled (0° C.) suspension of (2,4-difluorobenzyl)triphenylphosphonium bromide (266 mg, 0.57 mmol) in tetrahydrofuran (2.5 mL). The orange suspension was allowed to warm to room temperature for 1 hour. A solution of 4-[(4-fluorophenyl)sulfonyl]benzaldehyde (prepared according to the method of Example 46 Steps 1-4 using 4-fluorobenzenethiol in Step 1, 150 mg, 0.57 mmol) in tetrahydrofuran (0.5 mL) was added and the reaction was stirred overnight at room temperature. Water and ethyl acetate were added and the organic layer was dried over MgSO4 and evaporated in vacuo. The residue was purified by flash column chromatography on silica, eluting with 30% ethyl acetate/isohexane, followed by preparative HPLC to give the title compound (46 mg, 22%). 1H NMR δ (ppm)(DMSO): 8.01-7.99 (2H, m), 7.83 (2H, d, J=8.5 Hz), 7.47-7.42 (2H, m), 7.37 (2H, d, J=8.4 Hz), 7.27-7.17 (2H, m), 6.99 (1H, td, J=2.2, 8.6 Hz), 6.82 (1H, d, J=12.3 Hz), 6.70 (1H, d, J=12.0 Hz).

Provenance & Evidence