Cesium fluoride → 5-{6-[2-(2,4-Dichloro-phenyl)-ethylamino]-2-methoxy-pyrimidin-4-yl}-thiophene-2-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

A mixture of (6-chloro-2-methoxy-pyrimidin-4-yl)-[2-(2,4-dichloro-phenyl)-ethyl]-amine [277 mg, 0.83 mmol, Intermediate (44)], 5-(5,5-dimethyl-[1,3,2]dioxaborinan-2-yl)-thiophene-2-carboxylic acid (300 mg, 1.25 mmol), cesium fluoride (378 mg, 2.5 mmol) and tetrakis(triphenylphosphine) palladium (77 mg, 0.07 mmol) in water (2 mL) and ethylene glycol dimethyl ether (8 mL) is degassed with bubbling nitrogen for 5 minutes and is heated at 85° C. for 16 hours. The reaction mixture is cooled, diluted with water (150 mL) and brine (50 mL), and extracted three times with EtOAc (150 mL) and the extracts are concentrated in vacuo. The residue is subjected to flash column chromatography on silica (10 g) eluting with 0 to 15% MeOH in ethyl acetate. The product is triturated twice with heptanes (5 mL) and twice with ether (5 mL) and dried to afford 5-{6-[2-(2,4-dichloro-phenyl)-ethylamino]-2-methoxy-pyrimidin-4-yl}-thiophene-2-carboxylic acid (189 mg, Example 87) as a solid. MS: 424 (M+H); 1H NMR [300 MHz, (CD3)2SO]: δ 13.2 (1H, s); 7.7 (3H, m); 7.6 (1H, s); 7.35 (2H, s); 6.6 (1H, s); 4.85 (3H, s); 3.6 (2H, m); 3 (2H, t). IC50=0.16 nM

Provenance & Evidence