Diethylamine → HCID 68481571, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-(4′-iodo-4-ethyl-biphenyl-3-yl)-2,2,6,6-tetramethylpyran-3,5-dione (0.200 g, 0.42 mmol), trimethylsilylacetylene (0.10 ml, 0.47 mmol), copper(I) iodide (4 mg, 0.023 mmol), bis(triphenylphosphine)palladium(II) chloride (0.016 g, 0.023 mmol), triphenylphosphine (0.022 g, 0.084 mmol) and diethylamine (0.65 ml) in anhydrous N,N-dimethylformamide (0.25 ml) is heated at 120° C. under microwave irradiation for 25 minutes. This mixture is then allowed to cool to room temperature and filtered through diatomaceous earth (additional washing with dichloromethane). The solvent is removed under reduced pressure and the residue is purified by flash column chromatography on silica gel (hexane/ethyl acetate 9:1 to 3:1 ratio) to yield 4-[4-ethyl-4′-(trimethylsilylethynyl)biphenyl-3-yl]-2,2,6,6-tetramethylpyran-3,5-dione (0.143 g) as a white solid which is used without further purification in the next step.

Provenance & Evidence