2-Bromothiazole → HCID 23062573, compound

Participants

Reaction Steps

3-[(Piperidin-4-yl)carbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (100 mg) obtained in Example 228 is suspended in 2-butanol (5 ml), and thereto are added 2-bromothiazole (113 μl) and N,N-diisopropylethylamine (131 μl), and the mixture is heated under reflux for 24 hours. To the reaction solution are added 2-bromothiazole (57 μl) and N,N-dimethylacetamide (2 ml), and the mixture is further heated under reflux for 24 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is washed with water and a saturated brine, and dried over sodium sulfate. The solvent is evaporated under reduced pressure, and the resulting residue is purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate=3/1, then ethyl acetate) to give 3-[[1-(2-thiazolyl)piperidin-4-yl]-carbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (38 mg). This product is further treated with hydrogen chloride in dioxane to give the title compound (25 mg).

Provenance & Evidence