2-hydroxy-N,N-dipropylacetamide

Conditions: temp:0.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of 2-hydroxy-N,N-dipropylacetamide (1.8 g) and dimethylformamide (20 ml) is added sodium hydride (about 60% oily, 0.5 g) at 0 to 5° C., and the mixture is stirred at 0° C. for one hour. To the reaction mixture is added 4-chloro-2-(4-fluorophenyl)-5,6,7,8-tetrahydroquinazoline (2.0 g) at the same temperature, and the mixture is stirred at room temperature for four hours. To the mixture are added chloroform and ice-water, and the chloroform layer is collected, washed with water, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue is purified by silica gel column chromatography (eluent; chloroform), and recrystallized from a mixture of diethyl ether and n-hexane to give the desired compound (2.2 g), m.p. 95-96° C. the mixture is stirred at room temperature for four hours the chloroform layer is collected washed with water dried over anhydrous sodium sulfate concentrated under reduced pressure The residue is purified by silica gel column chromatography (eluent; chloroform) recrystallized from a mixture of diethyl ether and n-hexane