2-Bromo-4-fluoropyridine (CAS number 357927-50-5) is a dihalogenated pyridine with a bromine and a fluorine at 2- and 4-positions. 2,2'-Bipyridine ligands can be easily synthesized from 2-bromo-4-fluoropyridine reacting with bis(tributyltin) through Stille coupling. The fluoro substituents originated from 2-bromo-4-fluoropyridine enable the as synthesized 2,2'-bipyridine ligands for further functionalization. A Janus-type organoiridium complex is prepared with such method, bearing both hole- and electron-transporting moieties. 2-Bromo-4-fluoropyridine is also used to synthesize a bis(pyridine) ligands with 1,2-ethynylbenzene via Sonogashira coupling. The bis(pyridine) stabilizes iodine cation through [N−I−N] halogen bonding, for developing halogenating reagents.+

A chemical catalyst is designed based on 2-bromo-4-fluoropyridine for site-selective lysine acylation of histones.

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