Potassium Carbonate → 3-Bromo-5-phenylpyridine

Participants

Reaction Steps

A mixture of 3,5-dibromopyridine (10.0 g, 42.2 mmol), phenylboronic acid (4.6 g, 38.0 mmol), tetrakis(triphenylphosphine)palladium(0) (1.45 g, 1.25 mmol), potassium carbonate (17.5 g, 127 mmol), water (63 ml) and 1,2-dimethoxyethane (126 ml) was stirred at reflux overnight. Aqueous sodium hydroxide (1 M, 60 ml) was added followed by extraction twice with diethyl ether (100 ml). Chromatography on silica gel with dichloromethane as solvent gave the title compound. Yield 6.1 g, 68%, Mp 42-44° C.

Provenance & Evidence