[O:1]1[CH2:6][CH2:5][N:4]([C:7]2[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[N:10]3[CH:17]=[N:18][C:19]([C:20](OCC)=[O:21])=[C:9]3[N:8]=2)[CH2:3][CH2:2]1.C([NH2:28])(=O)C.C[O-].[Na+]>CN(C)C=O.CO.C(O)(C)C>[O:1]1[CH2:6][CH2:5][N:4]([C:7]2[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][CH:15]=3)[N:10]3[CH:17]=[N:18][C:19]([C:20]([NH2:28])=[O:21])=[C:9]3[N:8]=2)[CH2:3][CH2:2]1A stirred mixture of ethyl 5-morpholino-imidazo[1,5-a]quinazoline-3-carboxylate (2.0 g) and acetamide (1.2 g) in 20 ml of dry dimethylformamide was heated to 80° C. 30% sodium methoxide in methanol (1 ml) was added and the mixture was stirred at 100° C. for 2 hours, cooled to room temperature and diluted with isopropanol (20 ml). Crystals were filtered off, washed with isopropanol (15 ml), water (20 ml) and diethyl ether (10 ml), and dried to give the title compound as yellow crystals, m.p. >300° C. Yield 1.3 g.
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