109073-77-0

1762-42-1

109073-77-0

The general procedure for the synthesis of 2,2'-bipyridine-4,4'-dimethanol from diethyl [2,2'-bipyridine]-4,4'-dicarboxylate was as follows: sodium borohydride (1.87 g, 49 mmol) was added to diethyl [2,2'-bipyridine]-4,4'-dicarboxylate (567 mg) dissolved in anhydrous ethanol (34 mL) , 1.89 mmol) suspension. The reaction mixture was refluxed for 3 hours. After completion of the reaction, it was cooled to room temperature and saturated ammonium chloride solution (24 mL/g NH4Cl) was added to quench the excess sodium borohydride. Subsequently, ethanol was removed by evaporation under reduced pressure. The resulting solid was dissolved in a minimal amount of water using an ultrasonic bath. The aqueous phase was extracted with ethyl acetate (5 x 34 mL) and the organic phases were combined and dried over anhydrous sodium sulfate. Finally, the organic phase was concentrated under reduced pressure to give a white powdery product in 91% yield.