Cesium carbonate → 7-(4-Formylphenyl)-6-phenylpyrido[2,3-d]pyrimidine-2-carbonitrile

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Reaction Conditions

Reaction Steps

A mixture of 7-chloro-6-phenylpyrido[2,3-d]pyrimidine-2-carbonitrile (2-4) (0.350 g, 1.31 mmol), 4-formylphenyl boronic acid (0.492 g, 3.28 mmol), cesium carbonate (1.28 g, 3.94 mmol), and Pd(PtBu3)2 (0.067 g, 0.131 mmol) in anhydrous dioxane (8 mL) was degassed (3× vacuum pump/refilled with N2) and heated to 95° C. for 18 hr. The mixture was cooled, diluted with water, and extracted 3× with CH2Cl2. The combined organics were dried (anhd. Na2SO4), filtered, and concentrated. Purified by silica gel chromatography (10-30% EtOAc in Hexanes). 1H-NMR (500 MHz, CDCl3) δ 10.05 (s, 1H), 9.61 (s, 1H), 8.44 (s, 1H), 7.84 (d, 2H, J=8.3 Hz), 7.72 (d, 2H, J=8.3 Hz), 7.46-7.36 (m, 3H), 7.29-7.25 (m, 2H); LRMS, calc'd: 337.0, found: 337.0.

Provenance & Evidence