Sodium Carbonate → HCID 178484564, compound

Participants

Reaction Conditions

Reaction Steps

Trans-3-[4-(methylamino)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (125 mg) obtained in Example 221 is suspended in ethanol (5 ml), and thereto are added 2-iodo-ethanol (105 μl) and sodium carbonate (57 mg), and the mixture is stirred at 50° C. for 15 hours. To the mixture is further added 2-iodo-ethanol (53 μl), and the mixture is further stirred at 80° C. for 6 hours. Again, 2-iodo-ethanol (53 μl) is added thereto, and the mixture is stirred at 80° C. for 24 hours. The reaction solution is concentrated under reduced pressure, and to the residue is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is washed with water, a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: n-hexane/ethyl acetate=1/2, then ethyl acetate) to give trans-3-[4-(N-(2-hydroxyethyl)-N-methylamino)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (53 mg). Subsequently, this product is dissolved in chloroform/methanol (5/1, 6 ml), and thereto is added 4N hydrogen chloride in ethyl acetate (1 ml). The solvent is evaporated under reduced pressure. The resulting residue is suspended in diethyl ether, and collected by filtration to give the title compound (55 mg).

Provenance & Evidence