ethyl 2-chloro-5-hydroxybenzoate

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: To a mixture of commercially available 2-chloro-5-hydroxybenzoic acid (4 g, 23.18 mmol) in dry EtOH (90 mL), concentrated sulphuric acid (1 mL, 17.62 mmol) was added. The mixture was stirred under reflux overnight, then solvent evaporated under reduced pressure and the residue dissolved with DCM. A saturated solution of NaHCO3 was added, phases were separated, organics dried over sodium sulphate, filtered and evaporated to obtain 5 g of the corresponding 2-chloro-5-hydroxy-benzoic acid ethyl ester. was added under reflux overnight solvent evaporated under reduced pressure the residue dissolved with DCM A saturated solution of NaHCO3 was added phases were separated organics dried over sodium sulphate filtered evaporated