2-Methylbenzenesulfonic acid hydrate → 2-hydroxy-1-{2-[2-(4-trifluoromethyl-phenoxymethyl)-1H-benzoimidazol-5-yl]-phenyl}-ethanone

Participants

Reaction Conditions

Reaction Steps

A reaction mixture of 5-{2-[2-(tert-butyl-dimethyl-silanyloxy)-oxiranyl]-phenyl}-2-(4-trifluoromethyl-phenoxymethyl)-1H-benzoimidazole (0.072 g, 0.134 mmol) and toluenesulfonic acid monohydrate (0.031 g, 0.161 mmol) in THF (2 mL) was heated to 80° C. and stirred for 2 hours. The reaction mixture was concentrated and the residue was purified by chromatography (silica, hexanes: EtOAc, 1:2) to afford the title compound as a brown oil (0.053 g, 92%). 1H NMR (400 MHz, CD3OD) δ (ppm): 7.64 (d, 2H, J=9.2 Hz), 7.62-7.56 (m, 2H), 7.54-7.46 (m, 4H), 7.26-7.23 (m, 3H), 5.45 (s, 2H), 4.06 (s, 2H). Mass Spectrum (LCMS, ESI pos.) Calcd. For C23H18F3N2O3: 427.4 (M+H), Found 427.0.

Provenance & Evidence