Cesium carbonate → 2-(3-{6-[(2,3-Dihydro-benzofuran-2-ylmethyl)-amino]-2-methoxy-pyrimidin-4-yl}-phenyl)-2-methyl-propionic acid

Participants

Reaction Conditions

Reaction Steps

A mixture of (6-chloro-2-methoxy-pyrimidin-4-yl)-(2,3-dihydro-benzofuran-2-ylmethyl)-amine (167 mg, 0.57 mmol), 3-(1-carboxy-1-methyl-ethyl)-phenyl-boronic acid (155 mg, 0.75 mmol), and Cs2CO3 (0.46 g, 1.43 mmol) in ethylene glycol dimethyl ether (8 mL) and water (2 mL) is degassed by bubbling with Ar gas for 5 minutes, and treated with tetrakis(triphenylphosphine) palladium (0) (33 mg, 0.03 mmol) at room temperature. The mixture is heated at 85° C. for 3 h. The mixture is diluted with H2O (20 mL), and extracted with EtOAc (10 mL). The aqueous layer is separated, acidified to pH 2.5 with 1M HCl solution, and extracted with EtOAc (2×10 mL). The extracts are dried (MgSO4), filtered through a short pad of SiO2 to afford 2-(3-{6-[(2,3-dihydro-benzofuran-2-ylmethyl)-amino]-2-methoxy-pyrimidin-4-yl}-phenyl)-2-methyl-propionic acid (139 mg, Example 90). LCMS: RT=2.05 minutes; MS: 420 (M+H); 1H NMR (300 MHz, DMSO-d6) □12.4 (1H, s), 8.05-7.8 (2H, m), 7.5-7.1 (5H, m), 6.8-6.75 (2H, m), 5 (1H, s), 4 (3H, brs), 3.65 (2H, brs), 3.4-2.95 (2H, m), 1.48 (6H, s).

Provenance & Evidence