4-Fluorophenylboronic acid → [5-(4-Fluorophenyl)pyridin-3-yl]methanol

Participants

Reaction Steps

13.2 g of 4-fluorobenzeneboronic acid and 10.8 g of sodium hydrogen-carbonate are initially introduced, and a mixture of 16.1 g of 5-bromo-3-hydroxymethylpyridine, 30 ml of water and 60 ml of toluene is added with stirring and under a protective gas. A further 14 ml of water, 28 ml of toluene and 0.5 g of tetrakis(triphenylphosphine)palladium(0) are subsequently added. The reaction mixture is heated to reflux and held at this temperature for 2 hours. After cooling, the mixture is subjected to conventional work-up, giving 5-(4-fluorophenyl)nicotinyl alcohol. The alcohol is subsequently oxidized by conventional methods to give 5-(4-fluorophenyl)nicotinic acid.

Provenance & Evidence