Sodium Bicarbonate → 4-Chloroquinolin-7-ol

Participants

Reaction Steps

A solution of 7-benzyloxy-4-chloroquinoline (17 g, 56 mmol), (Konishi et al. WO 96/11187), in TFA (170 ml) was heated at reflux for 2 hours. The solvent was removed under vacuum and the residue was triturated with ether, filtered and washed with ether. The solid was suspended in an aqueous solution of sodium hydrogen carbonate (5.5 g, 65 mmol in 200 ml of water) and stirred at ambient temperature for 30 minutes. The solid was collected by filtration, washed with water and dried overnight under vacuum and over phosphorus pentoxide to give 4-chloro-7-hydroxyquinoline (9.85 g, 98%).

Provenance & Evidence