反应详情

The title compound was prepared according to the general procedure as described in step 2 of method B for the preparation of phosphate derivatives by the reaction of sodium salt of N-(4-(2,4-difluoro-3-(trifluoromethyl)phenyl)thiazol-2-yl)-2-(2,5,7-trimethyl-4,6-dioxo-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-d]pyrimidin-3-yl)acetamide (500 mg, 0.93 mmol) with freshly prepared di-tert-butyl iodomethyl phosphate (Intermediate 2) (489 mg, 1.39 mmol) dry DMF (5 ml) to yield 460 mg of product as a white solid. The title compound was also prepared according to the general procedure as described in method A by coupling of N-(4-(2,4-difluoro-3-(trifluoromethyl)phenyl)thiazol-2-yl)-2-(2,5,7-trimethyl-4,6-dioxo-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-d]pyrimidin-3-yl)acetamide (2.50 g, 4.86 mmol) with freshly prepared di-tert-butyl iodomethyl phosphate (Intermediate 2) (5.95 g, 17.02 mmol) in the presence of sodium hydride (60% dispersion in mineral oil, 291 mg, 7.29 mmol) in dry DMF (25 ml) to yield 1.35 g of pure product as an off-white solid. 1H NMR (300 MHz, CDCl3): δ 1.44 (s, 18H), 3.34 (s, 3H), 3.51 (s, 3H), 3.92 (s, 3H), 4.74 (s, 2H), 6.44 (d, J=9.6 Hz, 2H), 7.09 (t, J=9.3 Hz, 1H), 7.51 (s, 1H), 8.45 (q, J=9.0 Hz, 1H). ESI (m/z): 736.56 (M+H)+.