Hydrochloric Acid → 2',4'-Difluoro(1,1'-biphenyl)-4-ol

Participants

Reaction Steps

A 30 liter resin pot is fitted with stirrer, thermometer and reflux condenser, and charged with 2.62 kg of 50% aqueous sodium hydroxide and 11.34 liters of water. 4-(2',4'-Difluorophenyl)phenylacetate (1.876 kg., 7.55 m) is added and the batch is heated to reflux over 2.5 hours. The batch is refluxed for 2 hours (in solution at 75°), then cooled to 100° and added to a solution of 3.27 liters of concentrated hydrochloric acid in 9.8 liters of water in a 50 liter resin pot over a 30 minute period.

Provenance & Evidence