Hydrochloric Acid → 8-(benzyloxy)-5-(5-(tert-butoxycarbonylamino)-N-methylpentylsulfonamido)-1,6-naphthyridine-7-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

To a solution of methyl 8-(benzyloxy)-5-(5-(tert-butoxycarbonylamino)-N-methylpentylsulfonamido)-1,6-naphthyridine-7-carboxylate (Example 2.3; 4.05 mmol) in methanol (8 ml) and water (8 ml) at rt was added sodium hydroxide (16.2 mmol). The reaction was heated at 50° C. Ethyl acetate was added and the aquous phase was treated with HCl 1N until pH=6-7. Ethyl acetate was added again, the layers were separated and the organic phase was dried with MgSO4 and concentrated. The crude product was obtained in 94% yield, and used in the next step without further purification.

Provenance & Evidence