Hydrochloric Acid → [(7-Benzyloxy-1-cyano-4-hydroxy-isoquinoline-3-carbonyl)-amino]-acetic acid

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[(7-Benzyloxy-1-cyano-4-hydroxy-isoquinoline-3-carbonyl)-amino]-acetic acid was prepared by heating a solution of 110 mg (0.316 mmol) of 7-benzyloxy-1-cyano-4-hydroxy-isoquinoline-3-carboxylic acid ethyl ester and 210 mg (2.8 mmol) of glycine in 5 mL of 0.5 N NaOMe in methanol at reflux temperature for 28 hours. The reaction mixture was cooled and acidified with 3 mL of 1 N HCl. A white solid was collected on a medium glass fritted filter to provide 115 mg of the title compound; MS (ESI+): 378.2 e/z (M+1)

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