2 Bromopyridine

2-Bromopyridine is an organic compound with the formula BrC₅H₄N. It is a colorless liquid that is used as an intermediate in organic synthesis. It can be prepared from 2-aminopyridine via diazotization followed by bromination. It reacts with butyllithium to give 2-lithiopyridine, a versatile reagent. Pyrithione can be prepared in a two-step synthesis from 2-bromopyridine by oxidation to the N-oxide with a suitable peracid followed by subtitution using either sodium dithionite or sodium sulfide with sodium hydroxide to introduce the thiol functional group.