Triethylamine → tert-Butyl {5-[(3-aminophenyl)ethynyl]pyridin-3-yl}carbamate

Participants

Reaction Conditions

Reaction Steps

Into the reaction flask were added tert-butyl (5-bromopyridin-3-yl)carbamate (2.00 g, 7.32 mmol), copper(I) iodide (56 mg, 0.29 mmol), bis(triphenylphosphine)palladium(II) chloride (0.20 g, 0.29 mmol), tetrahydrofuran (20 mL) and triethylamine (1.1 mL, 8.0 mmol). The reaction mixture was stirred under N2 bubbling for 5 min. 3-Ethynylaniline (0.849 g, 7.3 mmol) was then added. The reaction mixture was heated at 50° C. overnight. After removal of the solvent, the residue was treated with EtOAc and water. The organic layer was dried over Na2SO4 and concentrated under vacuum. The crude was purified by silica gel column chromatography to give the desired product as a yellow gel (0.60 g, 49%). LCMS for C14H12N3O2 ([M-(tBu)+H]+H)+: m/z=254.0.

Provenance & Evidence