Cl[C:2]1[C:3]2[C:10]3[CH2:11][CH2:12][N:13](C(OC(C)(C)C)=O)[CH2:14][C:9]=3[S:8][C:4]=2[N:5]=[CH:6][N:7]=1.[Cl:22][C:23]1[CH:24]=[C:25]([CH:27]=[CH:28][C:29]=1[F:30])[NH2:26].O1CCOCC1>CC(O)C.Cl.O1CCOCC1>[Cl:22][C:23]1[CH:24]=[C:25]([NH:26][C:2]2[C:3]3[C:10]4[CH2:11][CH2:12][NH:13][CH2:14][C:9]=4[S:8][C:4]=3[N:5]=[CH:6][N:7]=2)[CH:27]=[CH:28][C:29]=1[F:30]tert-Butyl 4-chloro-5,8-dihydropyrido[4′,3′:4,5]thieno[2,3-d]pyrimidine-7(6H)-carboxylate from Example 11A (407.5 g, 1.251 mol) was dissolved in 2-propanol (5.7 L). 3-Chloro-4-fluoroaniline (191.2 g, 1.313 mol) and a 4 M solution of gaseous hydrogen chloride in dioxane (17.4 mL, 63 mmol) were added. The mixture was heated to 80° C. for 3 days. The thick suspension was then diluted with additional 2-propanol (1 L), and further 4 M hydrogen chloride in dioxane (695 mL, 2.5 mol) was added. The mixture was again heated to 80° C. for 3 h. The solvent was then removed in vacuo, and the residue was treated with 1 M aqueous sodium hydroxide solution (12 L). The precipitate was collected by suction filtration and washed with water. The product was dried for 2 days at 50° C., then triturated with tert-butyl methyl ether and collected by suction filtration to yield 397 g (95%) of the title compound.
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