反应详情

Lithium hydroxide monohydrate (2.4 g, 56.7 mmol) was added to a solution of 4-{3-[4-(3,3-dimethyl-butyl)-piperazin-1-yl]-3-oxo-propyl}-3-methyl-benzoic acid methyl ester from Example E44.1 (8.5 g, 22.7 mmol) in THF (200 ml) and water (100 ml). The mixture was stirred for 24 h at room temperature then solvents were removed in vacuo. The residue was purified by flash chromatography on silica gel (eluant; 2% acetic acid:4% methanol:94% dichloromethane) to yield the title compound (8.1 g, 99%).

1. customsolvents were removed in vacuo
2. customThe residue was purified by flash chromatography on silica gel (eluant; 2% acetic acid:4% methanol:94% dichloromethane)