Sodium Hydroxide → Pyridine, 2,3,5-trichloro-

Participants

Reaction Steps

To a 5-liter 3-neck flask fitted with a reflux condenser, a heater, thermometer and a stirrer were added 216.9 grams (1.0 mole) of 2,3,5,6-tetrachloropyridine, 500 milliliters of benzene, 1.0 liter of 8N sodium hydroxide and 130.7 grams (2.0 gram atoms) of zinc dust. The pH of the mixture was 14-15 and the mixture was heated and refluxed, with stirring, for 7 hours. After completion of the reaction, the reaction mixture was cooled and filtered. The filter cake was washed with benzene and the benzene wash was combined with the filtrate. Gas-liquid chromatography of the mixture indicated a 2,3,5-trichloropyridine content of about 131.35 grams (72 percent of theoretical).

Provenance & Evidence