Diisopropylamine → methyl (E)-[4-[3-[4-[3-(4-hydroxy-piperidin-1-yl)propynyl]-phenyl]-3-(4-trifluoromethylphenyl)allyloxy]-2-methylphenoxy]acetate

Participants

Reaction Steps

1-Propargylpiperidin-4-ol (215 mg, 1.55 mmol) and diisopropylamine (0.51 mL, 3.64 mmol) were added to a solution of methyl (Z)-[4-[3-(4-iodophenyl)-3-(4-trifluoromethyl-phenyl)-allyloxy]-2-methylphenoxy]acetate (450 mg, 0.773 mmol; example 4) in tetrahydrofuran (10 mL). The mixture was degassed and copper(I) iodide (12 mg, 0.063 mmol) and bis(triphenylphosphine)palladium(II) dichloride (27 mg, 0.039 mmol) were added. The reaction mixture was stirred at ambient temperature for 20 h and evaporated in vacuo. The residue was purified by flash column chromatography (silica gel Fluka 60, dichloromethane/methanol 98:2-97:3-95:5) yielding methyl (E)-[4-[3-[4-[3-(4-hydroxypiperidin-1-yl)propynyl]-phenyl]-3-(4-trifluoromethylphenyl)allyloxy]-2-methylphenoxy]acetate as yellow oil.

Provenance & Evidence