5-Fluoro-2-(4-fluorobenzyloxy)pyrimidin-4-amine → HCID 178512304, compound

Participants

Reaction Conditions

Reaction Steps

Cyanamide (8.00 g, 190.0 mmol) was stirred at reflux in triethylorthoformate (60 mL) for 2 h. The reaction was cooled to room temperature and distilled to provide ethyl-N-cyanoimidate (12.5 g, bp=110-112° C./45 mm Hg).* To this imidate (1 mL) was added 5-fluoro-2-(4-fluorobenzyloxy)pyrimidin-4-ylamine (0.05 g, 0.2 mmol) and the mixture was heated at 90° C. for 4 h, cooled, diluted with chloroform, filtered, and evaporated. The crude product was purified by reverse phase chromatography to furnish 0.053 g (17%) of the title compound as an off white solid: mp 148-149° C.; 1H NMR (300 MHz, CDCl3) δ 9.45 and 9.33 (bd, bs, J≈10 Hz, 1H), 8.33 and 8.25 (2d, J≈2 Hz, 1H), 7.46-7.38 (m, 2H), 7.11-7.01 (m, 2H), 5.35 and 5.33 (2s, 2H); HPLC-MS (ESI) m/z 290 (M+H)+, 288 (M−H)−. * Bridsen, Peter K., and Wang, Xiaodong, Synthesis, 1995, 855-8.

Provenance & Evidence