Potassium Carbonate → 3-(Pyridin-3-yl)aniline

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A mixture of diethyl 3-pyridylborane (16.3 g, 0.11 mol), 3-bromoaniline (12.2 ml, 0.11 mol), potassium carbonate (45.8 g, 0.33 mol) and tetrakis(triphenylphosphine)palladium(0) (80 mg) in a mixture of water (40 ml) and dimethoxyethane (80 ml) is heated to 80° C. under a stream of nitrogen over night. After cooling the mixture is diluted with water and ethyl acetate and filtered through a fluted filterpaper. The layers are separated. The aqueous layer is extracted once with ethyl acetate. The combined organic phases are dried over sodium sulfate and concentrated under reduced pressure. The residue is dissolved in ethanol. Water is added and the mixture is evaporated to dryness. This residue crystallizes upon trituration with ice-cold water. The crystals are collected, dried and washed with petroleum ether to afford pure 2a (16.3 g, 87%). Mp 75-76° C.

Herkunft & Nachweise