Cl.[Cl:2][C:3]1[C:12]2[C:7](=[CH:8][CH:9]=[C:10]([N+:13]([O-])=O)[CH:11]=2)[N:6]=[CH:5][N:4]=1.[O:16]([C:23]1[CH:29]=[CH:28][C:26]([NH2:27])=[CH:25][CH:24]=1)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1.CN(C)C1C=CC=CC=1>C(O)(C)C>[ClH:2].[NH2:13][C:10]1[CH:11]=[C:12]2[C:7](=[CH:8][CH:9]=1)[N:6]=[CH:5][N:4]=[C:3]2[NH:27][C:26]1[CH:25]=[CH:24][C:23]([O:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)=[CH:29][CH:28]=1A suspension of crude 4-chloro-6-nitroquinazoline hydrochloride (5 mmol) (Morley J. S. and Simpson J. C. E., J. Chem. Soc., 1948:360) was refluxed under nitrogen with stirring in isopropanol (10 mL) containing 4-phenoxyaniline (926 mg, 5 mmol) and N,N-dimethylaniline (1.215 g, 10 mmol) for 3 hours. The mixture was allowed to cool to 25° C., and the precipitate was collected by Buchner filtration, rinsed with isopropanol (2×10 mL) and dried at 60° C. in a vacuum oven to give 6-amino-4-(4-phenoxyanilino)quinazoline hydrochloride (1.702 g, 86%) as an orange solid; mp 293-294° C.
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