Dimethylformamide → HCID 178433766, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-methyl-3-{4-phenyl-5-[1-(tetrahydro-2H-pyran-2-yl)-1H-1,2,4-triazol-3-yl]-1,3-thiazol-2-yl}pyrazolo[1,5-a]pyridin-5-ol (73 mg, 0.16 mmol) produced in Example 31-B(i), (2-iodoethyl)benzoate (88 mg, 0.32 mmol), potassium carbonate (44 mg, 0.32 mmol) and N,N-dimethylformamide (3 mL) was stirred at 60° C. for 4 hr. To the reaction mixture was added water, and the mixture was extracted with ethyl acetate. The collected organic layer was washed with saturated brine and dried over anhydrous magnesium sulfate, and the insoluble material was filtered off. The filtrate was concentrated under reduced pressure, and the obtained residue was purified by basic silica gel column chromatography (ethyl acetate/hexane=30/70→100/0). The obtained solution was concentrated under reduced pressure. 1N Hydrochloric acid (2 mL), methanol (2 mL) and tetrahydrofuran (2 mL) were added to the obtained residue, and the mixture was stirred at 60° C. for 1 hr. To the reaction mixture were added methanol (1 mL) and tetrahydrofuran (1 mL), and the mixture was stirred at 60° C. for 2 hr. To the reaction mixture was added 2N aqueous sodium hydroxide solution (2 mL), and the mixture was stirred at room temperature for 1 hr. To the reaction mixture was added water, and the mixture was extracted with ethyl acetate. The collected organic layer was washed with saturated brine and dried over anhydrous magnesium sulfate, and the insoluble material was filtered off. The filtrate was concentrated under reduced pressure, and the obtained residue was washed with diisopropyl ether to give the title compound (54 mg, 81%) as a colorless solid.

Provenance & Evidence