反应详情

Following General Procedure B and using 6-ethynyl-8-hydroxy-2,2,4,4-tetramethyl-chroman (Intermediate 19, 0.05 g, 0.22 mmol), 2-fluoro-4-iodo phenyl acetic acid methyl ester (0.096 g, 0.33 mmol), triethyl amine (3 mL), copper(I)iodide (0.020 g, 0.1 mmol) and dichlorobis(triphenylphosphine)palladium(II) (0.07 g, 0.1 mmol) followed by flash column chromatography over silica gel (230-400 mesh), and preparative normal phase HPLC using 10% ethyl acetate in hexane as the mobile phase, the title compound was obtained (0.037 g, 43%).