Bromine → 2-Bromo-1-[3-(4-fluoro-phenyl)-5-methyl-3H-[1,2,3]triazol-4-yl]-ethanone

Participants

Reaction Steps

A solution of 1-[3-(4-fluoro-phenyl)-5-methyl-3H-[1,2,3]triazol-4-yl]-ethanone (3.62 g, 17 mmol) was dissolved in chloroform (28 mL) and acetic (0.5 mL) was heated to reflux and then a solution of bromine (0.89 mL, 17 mmol) in chloroform (9 mL) and heated under reflux for 2 h. After cooling to room temperature the mixture was poured onto ice-water and the mixture extracted with dichloromethane. The combined organic extracts were washed with water, brine, dried over sodium sulphate, filtered and evaporated. Purification by chromatography (silica, 10 to 60% ethyl acetate in heptane) afforded the title compound (3.34 g, 68%) as an off white solid. MS: m/e=298.3/300.2 [M+H]+.

Provenance & Evidence