Water → 2-[4-(2,6-Dichlorophenyl)piperazin-1-yl]-6-trifluoromethyl-1H-benzoimidazole

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Reaction Steps

A mixture of the benzoimidazole from step (c) above (75 mg, 0.34 mmol), the piperazine from step (a) above (90 mg, 0.39 mmol) and N,N-diisopropylethylamine (0.1 mL, 0.58 mmol, Aldrich) in DMSO (2 mL) was stirred at 80° C. for 24 h. The mixture was cooled to room temperature, water (10 mL) was added and the mixture was extracted with EtOAc (2×20 mL). The combined organic phases were washed with water (2×10 mL) and brine (5 mL), dried over Na2SO4, and filtered. The solvent was removed in vacuo and the residue was purified by silica gel chromatography, eluting with 20% EtOAc/hexane to give the title compound as a white solid. M.p. 263-265° C. MS (ESI, pos. ion) m/z: 415 (M+1).

Provenance & Evidence