Diisopropylethylamine → tert-Butyl {3-[(3-aminophenyl)ethynyl]phenyl}carbamate

Participants

Reaction Conditions

Reaction Steps

A solution of 3-ethynylaniline (1.16 g, 9.87 mmol) and tert-butyl (3-iodophenyl)carbamate (3.0 g, 9.4 mmol) in THF (28 mL) was treated with bis(triphenylphosphine)palladium(II) chloride (330 mg, 0.47 mmol), copper(I) iodide (140 mg, 0.75 mmol) and N,N-diisopropylethylamine (3.27 ml, 18.8 mmol), and stirred at 25° C. overnight. The reaction was diluted with water and extracted with ethyl acetate three times. The combined organic solutions were dried with sodium sulfate, filtered, and concentrated in vacuo. The crude residue was purified by flash column chromatography to yield the desired product (1.42 g, 49%). LCMS for C19H21N2O2 (M+H)+: m/z=309.1.

Provenance & Evidence