Tetrahydrofuran → HCID 16117161, compound

Participants

Reaction Steps

N-{4-[(4-Aminopyrimidin-6-yl)oxy]-2,5-difluorophenyl}-N′-(4-fluorophenyl)cyclopropane-1,1-dicarboxamide (100 mg) was dissolved in tetrahydrofuran (7.5 ml) under a nitrogen atmosphere, triethylamine (0.180 ml) and phenyl chloroformate (0.150 ml) were added dropwise at room temperature, followed by stirring for 50 min. The reaction mixture was partitioned between ethyl acetate and water. The organic layer was separated, washed with a 1N aqueous solution of sodium hydroxide and brine, dried over anhydrous sodium sulfate. The solvent was concentrated under reduced pressure. The residue was dissolved in N,N-dimethylformamide (2.5 ml). To the solution were added triethylamine (0.400 ml) and 3-(hydroxymethyl)azetidine hydrochloride (280 mg) at room temperature, followed by stirring overnight. The reaction mixture was partitioned between ethyl acetate and water. The organic layer was separated, washed with a 1N aqueous solution of sodium hydroxide and brine, dried over anhydrous sodium sulfate. The solvent was concentrated under reduced pressure. The resultant residue was purified by silica gel column chromatography (eluent; ethyl acetate, then ethyl acetate:methanol=95:5), and fractions containing the target compound were concentrated under reduced pressure. To the resultant residue was added tert-butyl methyl ether:heptane=1:2 to precipitate a solid. The solid was collected by filtration and dried under aeration to provide the titled compound as white powder (15.6 mg, 12%).

Provenance & Evidence