Dimethylformamide → HCID 19363510, compound

Participants

Reaction Conditions

Reaction Steps

2-Amino-4-methoxy-3-pentyloxy-N-(2-pyridin-4-ylethyl)benzamide (100 mg, 0.280 mmol) obtained in Example 2-61, dimethyl formamide dimethyl acetal (0.19 ml, 1.4 mmol) and DMF (0.5 ml) were mixed, and p-toluene sulfonate monohydrate (2 mg, 0.011 mmol) was added to this solution. The mixture was stirred at 130° C. for 5 hours, and ethyl acetate (15 ml) and saturated aqueous sodium hydrogencarbonate solution (15 ml) were added to separate the organic layer. The organic layer was washed with saturated bnne (15 ml), and dried over anhydrous magnesium sulfate. The drying agent was filtered off and the filtrate was concentrated under reduced pressure. The obtained residue was purified by column chromatography on silica gel (chloroform/methanol=25/1) to give 7-methoxy-8-pentyloxy-3-(2-pyridin-4-ylethyl)-3H-quinazolin-4-one (57 mg, 55%) as a pale-yellow oil.

Provenance & Evidence