Hydrochloric Acid → 4-{[(Benzyloxy)carbonyl]amino}-2-hydroxybenzoic acid

Participants

Reaction Steps

To a solution of sodium-p-aminosalicylate (100 g, 0.65 mol) in 10% aqueous NaOH solution (1 L) was added a 50% wt solution of benzyl chloroformate (670 g, 1.96 mol in toluene) at 0° C. and stirred at rt for 48 h. The reaction mixture was cooled and acidified with a 10% aqueous HCl at 0° C. The solid obtained was filtered and washed with cold water and dried. The solid was treated with PetEther and filtered to give the title compound (129 g, 68%) used in the next steps without further purification.

Provenance & Evidence