Cesium carbonate → 2-{3-[6-(2,2-Difluoro-2-phenyl-ethylamino)-2-methoxy-pyrimidin-4-yl]-phenyl}-2-methyl-propionic acid

関与物質

反応手順

A mixture of (6-chloro-2-methoxy-pyrimidin-4-yl)-(2,2-difluoro-2-phenyl-ethyl)-amine (0.19 g, 0.62 mmol), 3-(1-carboxy-1-methyl-ethyl)-phenyl boronic acid [190 mg, 0.94 mmol, see Example 49(b), step 2], and Cs2CO3 (0.51 g, 1.6 mmol) in ethylene glycol dimethyl ether (10 mL) and water (2 mL) is degassed by bubbling with Argon gas for 5 minutes, and treated with tetrakis(triphenylphosphine)palladium(0) (36 mg, 0.03 mmol) at room temperature. After 6 h at 85° C., the mixture is diluted with water (15 mL), and extracted with EtOAc (2×20 mL). The extracts are dried (MgSO4), filtered, and concentrated. The residue is chromatographed on SiO2 eluting with 70% EtOAc in heptane to afford 2-{3-[6-(2,2-difluoro-2-phenyl-ethylamino)-2-methoxy-pyrimidin-4-yl]-phenyl}-2-methyl-propionic acid [0.28 g Example 67]. LCMS: RT=2.82 minutes; MS: 428 (M+H); 1H NMR (300 MHz, CDCl3) 9.6 (1H, s), 8 (1H, s), 7.81 (1H, d, J=7.5 Hz), 7.5-7.4 (7H, m), 6.4 (1H, s), 4.2-4 (2H, m), 3.96 (3H, s), 1.65 (6H, s). IC50=38 nM

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