反应详情

Triethylamine (10 ml, 72.1 mmol) and 4-picolylamine (4 ml, 39.4 mmol) were added to a tetrahydrofuran solution (20 ml) of 4-chloro-7-ethylamino-6-nitroquinazoline obtained from 7-ethylamino-6-nitro-4(3H)-quinazolone (737.9 mg, 3.15 mmol) according to the procedures in Reference Example 13 under ice-cooling. The mixture was stirred at room temperature for 13 hours and at 55° C. for 4 hours. After a solvent was distilled off, the residue was purified by silica gel column chromatography (eluted with ethyl acetate:hexane=9:1) to give the title compound (780 mg, 76%).