Sodium Hydroxide → 4-[3-(4-Cyclopropyl-piperazin-1-yl)-propoxy]-3-fluoro-benzoic Acid

Participants

Reaction Conditions

Reaction Steps

4-[3-(4-Cyclopropyl-piperazin-1-yl)-propoxy]-3-fluoro-benzoic acid ethyl ester from Example E48.2 (1.0 g, 2.9 mmol) was dissolved in dioxan (10 ml) and 2N NaOH solution (3 ml, 6.0 mmol) was added. The mixture was heated at 60° C. for 18 h then concentrated in vacuo. The residue was purified by flash chromatography on silica gel (eluant; 1% 35% ammonia:19% methanol:80% dichloro-methane) to yield the title compound (920 mg, 100%).

Provenance & Evidence