[CH3:1][O:2][C:3]1[N:8]=[C:7]([O:9][CH3:10])[C:6]([NH2:11])=[CH:5][N:4]=1.[C:12](N1C=CN=C1)(N1C=CN=C1)=[S:13].CCCCCC.C(OCC)(=O)C>O1CCCC1>[N:11]([C:6]1[C:7]([O:9][CH3:10])=[N:8][C:3]([O:2][CH3:1])=[N:4][CH:5]=1)=[C:12]=[S:13]To a solution of 2,4-dimethoxypyrimidin-5-amine (prepared by the method described in U.S. Pat. No. 6,342,503B1) (4.68 g, 30.0 mmol) in tetrahydrofuran (60 mL) was added 1,1′-thiocarbonyldiimidazole (6.41 g, 36.0 mmol) portionwise at 0° C. The mixture was warmed to room temperature and stirred for 20 hr. The mixture was concentrated in vacuo to give a residue which was passed through a pad of silica gel eluting with n-hexane/ethyl acetate. The filtrate was concentrated in vacuo to give the title compound (5.0 g, 84%) as a colorless solid.
Wird geladen…
