Cesium fluoride → HCID 66649265, compound

Participants

Reaction Steps

To a stirred solution of 50 (400 mg, 1.08 mmol) in DME (20 ml) was added 3,4-dimethoxyphenylboronic acid (394 mg, 2.17 mmol), NaHCO3 (273 mg, 3.25 mmol), CsF (494 mg, 3.25 mmol), Pd(PPh3)4 (125 mg, 0.11 mmol) and water (10 ml). The reaction mixture was degassed for 15 min with a nitrogen stream, and was heated to reflux for 2.5 hrs under nitrogen. After cooling to room temperature the reaction mixture was diluted with AcOEt and successively washed with water, sat. NH4Cl, brine, dried over anhydrous MgSO4, filtered, and concentrated. The crude product was purified by flash column chromatography (eluents AcOEt/CH2Cl2: 5/95 to 30/70) and triturated in AcOEt/hexanes to afford title compound 331 (273 mg, 59% yield) as a yellow solid. MS (m/z): 427.1 (M+H)+.

Provenance & Evidence