Cesium carbonate → 4-[N-[1-[N-(benzofuran-2-ylcarbonyl)amino]cyclohexanecarbonyl]amino]-1-(4-fluoro-2-trifluoromethylphenyl)piperidin-3-ol

Participants

Reaction Conditions

Reaction Steps

To the suspension of 4-[N-[1-[N-(benzofuran-2-ylcarbonyl)amino]cyclohexanecarbonyl]amino]-3-piperidinol hydrochloride (300 mg) obtained in Step 2 of Example 1 in 5 ml of toluene, were added 1-bromo-4-fluoro-2-trifluoromethylbenzene (0.198 ml), cesium carbonate (1.42 g), (S)-2,2-bis(diphenylphospino)-1,1-binaphtyl (BINAP; 45.4 mg) and tris(dibenzylideneacetone)dipalladium (1.42 g). The reaction mixture was stirred for about 4 hours at 100° C. under nitrogen atmosphere, was diluted with 30 ml of ethyl acetate, filtered, and concentrated. The resulting residue was purified with column chromatography to give 179 mg of the titled compound.

Provenance & Evidence