Dimethylformamide → 2-Anilino4-(2-formyl-1-isopropylimidazol-5-yl)pyrimidine

Participants

Reaction Conditions

Reaction Steps

n-Butyllithium (7.2 ml of 1.6 M solution in hexane, 11.2 mmol) was added to a solution of 4-(1-isopropylimidazol-5-yl)-2-anilinopyrimidine (Method 5; 1.25 g, 4.48 mmol) in anhydrous THF (50 ml) cooled to −70° C., and the reaction mixture was then stirred at −70° C. for 30 minutes. Anhydrous DMF (0.7 ml, 9.0 mmol) was added and the mixture was stirred for 18 hour at ambient temperature. The mixture was quenched with water (50 ml), and was extracted with EtOAc (4×75 ml). The organic extracts were combined, washed with brine (2×50 ml), dried and evaporated. The residue was purified by chromatography eluting with EtOAc/Hexane (1:1) to give the title compound (930 mg, 68%) as a pale yellow crystalline solid. NMR (CDCl3): 1.6 (d, 6H), 5.60-5.75 (m, 1H), 6.98 (d, 1H), 7.12 (t, 1H) , 7.30-7.40 (m, 3H), 7.55-7.65 (m, 3H), 8.50(d, 1H), 9.90 (s, 1H); m/z 308.

Provenance & Evidence