Ammonium Chloride → 2-(4-Amino-3-methylphenoxy)-5-fluorobenzonitrile

Participants

Reaction Steps

Intermediate (24t) (14.3 g, mmol) and zinc dust (17.2 g, 263 mmol) were suspended in mixed solvent of MeOH/THF (1:1, 125 mL) and saturated NH4Cl (125 mL) was added. The reaction mixture became warm. There was an obvious change in the zinc suspension. The reaction was finished in 10 minutes. The reaction mixture was filtered through a silica plug and diluted with EtOAc and saturated NaHCO3. The layers were separated and the combined organics dried over MgSO4 and concentrated under reduced pressure. The crude residue (25t) was pure enough on NMR spectra. 1H NMR (400 MHz, d6-DMSO) δ 7.83 (dd, J=8.5, 3.1 Hz, 1H), 7.47 (td, J=8.9, 3.1 Hz, 1H), 6.83-6.77 (m, 2H), 6.74 (dd, J=8.6, 2.3 Hz, 1H), 6.66 (d, J=8.6 Hz, 1H), 4.88 (s, 1H), 2.06 (s, 3H) ppm.

Provenance & Evidence