Diethyl Ether → HCID 23153063, compound

Participants

Reaction Steps

Piperidine-1-carboxylic acid [4-(4-amino-3-chlorophenoxy)pyridin-2-yl]amide (100 mg) was dissolved in N,N-dimethylformamide (2 ml) under a nitrogen atmosphere, and then N-(4-fluorophenyl)malonic acid (171 mg), triethylamine (0.121 ml) and (1H-1,2,3-benzotriazol-1-yloxy)[tri(dimethylamino)]phosphonium hexafluorophosphate (383 mg) were added thereto at 50° C., followed by stirring at the same temperature for 1 hr and 30 min. The reaction mixture was cooled down to room temperature, and partitioned between ethyl acetate and a 1 N aqueous solution of sodium hydroxide. The organic layer was washed with a saturated aqueous solution of sodium hydrogencarbonate, water and brine in this order, and dried over anhydrous sodium sulfate. The solvent was evaporated to give a residue, which was purified by silica gel column chromatography (FUJI Silysia NH, eluent; ethyl acetate:ethanol=49:1). Fractions containing a crude product were concentrated to give a residue, which was then further purified by silica gel column chromatography (FUJI Silysia NH, eluent; ethyl acetate:ethanol=49:1). Fractions containing the target compound were concentrated to give a residue, to which diethyl ether (5 ml)-hexane (5 ml) was added to suspend. The solid was filtered off and dried under aeration to provide the titled compound (123 mg, 81.3%) as white powder.

Provenance & Evidence