Hydrochloric Acid → 3-[1-(6-Ethoxy-7-hydroxy-2-morpholino-4-quinazolinyl)-4-piperidinyl]-1,2,3,4-tetrahydro-1,6-dimethyl-2,4-dioxoquinazoline

Participants

Reaction Steps

In 10 ml of DMF was suspended 1.19 g (30.0 mmol) of 60% sodium hydride, and 3.07 ml (30.0 mmol) of thiophenol in 20 ml of DMF was dropwised under ice-cooling. After the mixture was stirred at ice-cooling for 10 minutes, 5.74 g (10.0 mmol) of Compound 10 obtained in Example 10 in DMF (50 ml) was added at ice-cooling, then the reaction mixture was stirred at 150° C. for 20 hours. After the reaction mixture was cooled to room temperature, water was added, pH of the reaction mixture was adjusted at 5 by concentrated hydrochloric acid and was subjected to extraction with chloroform. The organic layer was washed with sodium chloride solution and dried, concentrated to give residue which was purified by silica gel column chromatography (eluent: chloroform/methanol=50/1). The more polar product obtained was recrystallized from ethanol/ether to give 2.67 g (yield: 49%) of Compound 47 as white crystals.

Provenance & Evidence